FINAL_Cary-Apex_IBT-Mod_EA_12172014

Environmental Assessment
FOR THE TOWNS OF CARY, APEX AND MORRISVILLE AND WAKE COUNTY
Interbasin Transfer

PREPARED BY
DECEMBER 2014
Division of Water Resources512 N. Salisbury Dr., Raleigh, NC 27604
PREPARED FOR
ES121214092345WDC
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CH2M HILL
3120 Highwoods Boulevard
Suite 214 – Magnolia Building
Raleigh, NC 27604
Tel [phone]
Fax [phone]

December 17, 2014
Mr. Harold Brady
NC Department of Environment and Natural Resources
Division of Water Resources
512 N. Salisbury Dr.
Raleigh, NC 27604
Subject: Environmental Assessment for the Towns of Cary, Apex, and Morrisville, and
Wake County Interbasin Transfer Certificate Modification
Dear Mr. Brady:
Please find enclosed 2 hard copies and 9 CD’s of the Environmental Assessment for the
Towns of Cary, Apex, and Morrisville, and Wake County Interbasin Transfer Certificate
Modification for submittal to the State Environmental Review Clearinghouse.
If you have any questions, please contact me at 919.760.1772, or by email at
[e-mail].
Sincerely,

CH2M HILL

Adam Sharpe
Project Manager

Cc: Leila Goodwin, Town of Cary
Syd Miller, Town of Cary
David Hughes, Town of Apex
Jessica Bolin, Town of Apex
Bill Kreutzberger, CH2M HILL

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I
Table of Contents
Table of Contents ....................................................................................................................................... i
Acronyms and Abbreviations ...................................................................................................................... v
Executive Summary .............................................................................................................................. ES-1
1 Background and Project Description .......................................................................................... 1-1
1.1 Background ............................................................................................................................ 1-1
1.1.1 Water Supply ............................................................................................................ 1-1
1.1.2 Water Treatment and Distribution ........................................................................... 1-1
1.1.3 Wastewater Collection and Discharge ...................................................................... 1-2
1.1.4 Reclaimed Water ...................................................................................................... 1-2
1.1.5 Interbasin Transfer.................................................................................................... 1-3
1.1.6 Regional Water Supply Planning ............................................................................... 1-3
1.2 Project Description ................................................................................................................ 1-4
1.2.1 Study Area ................................................................................................................. 1-5
2 Project Purpose and Need ......................................................................................................... 2-1
2.1 Historical Growth in Population and Water Demand ............................................................ 2-1
2.2 Future Population and Water Demand Forecast ................................................................... 2-2
2.2.1 Future Population Forecast ...................................................................................... 2-2
2.2.2 Water Demand Forecast ........................................................................................... 2-3
2.2.3 Future Wastewater Flow Forecast ............................................................................ 2-4
2.2.4 Interbasin Transfer.................................................................................................... 2-5
3 Alternatives Evaluation ............................................................................................................. 3-1
3.1 Description of Alternatives .................................................................................................... 3-1
3.2 No Action (Alternative 1) ....................................................................................................... 3-1
3.3 Increase in Interbasin Transfer to Meet 2045 Demands (Alternative 2a) - Proposed IBT
Certificate Modification ......................................................................................................... 3-2
3.4 Increase in Interbasin Transfer to Meet 2045 Demands and Use Current Permitted
Wastewater Capacity (Alternative 2b) ................................................................................... 3-3
3.5 Avoid Interbasin Transfer Increase by Sending Additional Untreated Wastewater to the
WWRWRF (Alternative 3a) .................................................................................................... 3-4
3.6 Avoid Interbasin Transfer Increase by Discharging Additional Treated Wastewater Effluent to
the Cape Fear River Basin (Alternative 3b) ............................................................................ 3-5
3.7 Avoid Interbasin Transfer Increase by Using a Water Source in the Neuse River Basin
(Alternative 3c) ...................................................................................................................... 3-5
3.7.1 New Water Supply Source Development ................................................................. 3-6
3.7.2 Finished Water Capacity Purchase from a Neuse River Basin Utility ....................... 3-8
3.8 Avoid Interbasin Transfer Increase by Using Groundwater as a Source (Alternative 3d) ..... 3-8
3.9 Avoid Interbasin Transfer Increase by Using Additional Water Resources Management Tools
(Alternative 3e) ...................................................................................................................... 3-9
3.10 Selection of the Preferred Alternative ................................................................................. 3-10
4 Existing Environmental Conditions in the Study Area ................................................................. 4-1
4.1 Study Area Source and Receiving Basins Defined .................................................................. 4-1
4.2 Water Resources .................................................................................................................... 4-1
4.2.1 Surface Water ........................................................................................................... 4-1
TABLE OF CONTENTS
II
4.2.2 Groundwater ........................................................................................................... 4-15
4.2.3 Wetlands ................................................................................................................. 4-16
4.2.4 Topography ............................................................................................................. 4-19
4.3 Soils ...................................................................................................................................... 4-19
4.3.1 Source Basin ............................................................................................................ 4-19
4.3.2 Receiving Basins ...................................................................................................... 4-19
4.4 Wildlife Resources ............................................................................................................... 4-19
4.4.1 Threatened and Endangered Terrestrial Species .................................................... 4-20
4.5 Aquatic Resources ................................................................................................................ 4-22
4.5.1 Threatened and Endangered Aquatic Species ........................................................ 4-22
4.5.2 Significant Aquatic Endangered Species Habitat .................................................... 4-24
4.6 Land Cover ........................................................................................................................... 4-24
4.6.1 Source Basin ............................................................................................................ 4-24
4.6.2 Receiving Basins ...................................................................................................... 4-24
4.7 Agricultural Land and Prime Farmland ................................................................................ 4-29
4.7.1 Source Basin ............................................................................................................ 4-29
4.7.2 Receiving Basins ...................................................................................................... 4-29
4.8 Forested Resources .............................................................................................................. 4-29
4.9 Public Lands and Scenic and Natural Areas ......................................................................... 4-33
4.10 Archaeological and Historic Resources ................................................................................ 4-36
4.11 Air Quality ............................................................................................................................ 4-38
4.12 Noise Levels ......................................................................................................................... 4-39
4.13 Toxic Substances and Hazardous Wastes ............................................................................ 4-39
5 Environmental Effects ............................................................................................................... 5-1
5.1 Water Resources .................................................................................................................... 5-1
5.1.1 Surface Water ........................................................................................................... 5-1
5.1.2 Groundwater ............................................................................................................. 5-6
5.1.3 Wetlands ................................................................................................................... 5-6
5.1.4 Topography ............................................................................................................... 5-6
5.2 Aquatic Resources .................................................................................................................. 5-6
5.3 Other Resources .................................................................................................................... 5-7
6 Mitigation ................................................................................................................................. 6-1
6.1 Water Conservation ............................................................................................................... 6-1
6.2 Water Shortage Response Plan ............................................................................................. 6-2
6.3 Water Reuse........................................................................................................................... 6-2
6.4 Water Quality Protection ....................................................................................................... 6-2
6.5 Regional Water Supply Collaboration .................................................................................... 6-3
7 References ................................................................................................................................ 7-1

List of Exhibits
1-1 Service Area Map
1-2 Water Movement Illustration
1-3 Study Area Map
2-1 Historical Population Estimates, 2001-2012
2-2 Historical Annual Average Daily Raw and Finished Water Demand for the Towns of Apex and Cary,
2001-2013
TABLE OF CONTENTS

III
2-3 Utility Service Area Population Forecast, 2015-2045
2-4 Annual Average Daily Raw Water Demand Forecast Expected Values, 2012-2045
2-5 Annual Average Daily Wastewater Flow Forecast Expected Values by Town and WRF Service Area,
2015-2045
2-6 Historical IBT Estimates for the Towns of Apex and Cary, 2001-2013
2-7 Forecast of IBT from the Haw River Subbasin to the Neuse River Basin, 2012-2045, Maximum Month
Average Day
2-8 Forecast of IBT from the Haw River Subbasin to the Cape Fear River Subbasin, 2012-2045, Maximum
Month Average Day
2-9 Forecast of IBT from the Haw River Subbasin to the Neuse River Basin and Cape Fear River Subbasin,
2012-2045, Maximum Month Average Day
3-1 Planned Process for DWR Round 4 Jordan Lake Allocation
3-2 Wake Stone Corporation Triangle Quarry Location
3-3 Annual Average Overall Water Use by Town of Cary Customers, 1995-2013
3-4 Summary of Alternatives
4-1 Surface Water
4-2 Jordan Lake’s Storage Volume
4-3 Historical Lake Levels – Jordan Lake
4-4 Haw River Flow, USGS Gaging Station – Bynum, North Carolina
4-5 Haw River Annual Flow, USGS Gaging Station – Bynum, North Carolina
4-6 Cape Fear River Flow, USGS Gaging Station – Lillington, North Carolina
4-7 Cape Fear River Annual Flow, USGS Gaging Station – Lillington, North Carolina
4-8 Wetlands
4-9 Natural Communities
4-10 Federally Listed Terrestrial Wildlife and Plant Species Potentially Occurring Within the Study Area
4-11 Federally Listed Aquatic Species Potentially Occurring Within the Study Area
4-12 Wildlife and Natural Habitat
4-13 Land Cover
4-14 Protected Lands
4-15 Gamelands
4-16 Significant Natural Heritage Areas
4-17 Historic Places
5-1 Summary of Hydrologic Model Scenarios
5-2 Comparison of the Percentage of the Period of Record Below the Key Hydrologic Indicators
Appendices
A 2001 Interbasin Transfer Certificate
B 2013 Annual Report on Interbasin Transfers
C Notice of Intent to Modify the Interbasin Transfer Certificate
D Modeling Evaluation of the Effects of the Cary/Apex Water Supply Interbasin Transfer Technical
Memorandum
E Agency Correspondence

TABLE OF CONTENTS
IV

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V
Acronyms and Abbreviations
AQI Air Quality Index
B Primary Recreation, Fresh Water (water classification)
BI Biotic Index
C Aquatic Life, Secondary Recreation, Fresh Water (water classification)
CA Critical Area (water classification)
CAWTF Cary/Apex Water Treatment Facility
CFNRBHM Cape Fear-Neuse River Basin Hydrologic Model
CNRM calibrated nutrient response model
cfs cubic foot per second
dBA decibel (A-weighted scale)
DWR Division of Water Resources
DWQ Division of Water Quality
EA environmental assessment
EIS environmental impact statement
EMC Environmental Management Commission
EPT Ephemeroptera, Plecoptera, and Trichoptera
FEMA Federal Emergency Management Agency
FIRM Flood Insurance Rate Map
FSC Federal Species of Concern
GIS geographical information system
GS North Carolina General Statute
IBT interbasin transfer (unless otherwise stated, calculated as the daily average of a
calendar month)
JLP Jordan Lake Partnership
Jordan Lake B. Everett Jordan Lake
LRWRP Long Range Water Resource Plan
mi2 square miles
mgd million gallons per day
mg/L milligrams per liter
ml milliliter
NCDENR North Carolina Department of Environment and Natural Resources
NCNHP North Carolina Natural Heritage Program
NCWRC North Carolina Wildlife Resources Commission
NLCD National Land Cover Database
ACRONYMS AND ABBREVIATIONS
VI
NPDES National Pollutant Discharge Elimination System
NPL National Priorities List
NRHP National Register of Historic Places
NSW Nutrient Sensitive Waters (water classification)
NWI National Wetland Inventory
O&M operations and maintenance
OWASA Orange Water and Sewer Authority
PCB polychlorinated biphenyl
RDU Airport Raleigh–Durham International Airport
ROD Record of Decision
RTP South Research Triangle Park
SAESH Significant Aquatic Endangered Species Habitat
SCI secondary and cumulative impacts
SCIMMP Secondary and Cumulative Impacts Master Management Plan
SNHA Significant Natural Heritage Area
State State of North Carolina
SR state road
TMDL total maximum daily load
Towns Apex, Cary, and Morrisville
TP total phosphorus
Triangle WWTP Durham County Triangle Wastewater Treatment Plant
USACE United States Army Corps of Engineers
USDA United States Department of Agriculture
USEPA United States Environmental Protection Agency
USFWS United States Fish and Wildlife Service
USGS United States Geological Survey
UT Unnamed Tributary
WRF Water Reclamation Facility
WS-III Water Supply III – Moderately Developed (water classification)
WS-IV Water Supply IV – Highly Developed (water classification)
WSRP water shortage response plan
WWTP Wastewater Treatment Plant
WWRWRF Western Wake Regional Water Reclamation Facility

ES-1
Executive Summary
Since the mid-1990s the Towns of Apex, Cary, and Morrisville (Towns) and Wake County (on behalf of the
Wake County portion of Research Triangle Park [RTP South]) have been cooperatively working to develop
and manage their water resources. The Towns, Wake County, and RTP South cooperate under various
organizational arrangements for raw water supply, water treatment, water distribution, wastewater
collection, wastewater treatment, reclaimed water distribution, and interbasin transfer (IBT). Together, the
Towns and Wake County have been planning for a secure long-range future water supply for their customers
and responsible water management, including IBT.
The Towns and Wake County are subject to an IBT certificate issued by the Environmental Management
Commission (EMC) on July 12, 2001 (“2001 IBT Certificate”). An IBT certificate is required by North Carolina
law, because wastewater discharges and consumptive uses occur in receiving basins that differ from the
Towns’ water supply source basin, the Haw River subbasin of the Cape Fear River basin. The 2001 IBT
Certificate limits transfers from the Towns’ water supply source basin, the Haw River subbasin (Jordan Lake),
to the Neuse River basin to 24 million gallons per day (mgd) on a maximum day basis.
The Towns have maintained compliance with the 2001 IBT Certificate since it was issued, including the
maximum day limit and eight additional conditions. Compliance with the transfer limit and certificate
conditions is detailed in annual reports submitted to the Division of Water Resources (DWR). In addition, no
impacts have been identified as a result of the ongoing transfers. This is consistent with both the 2000
Environmental Impact Statement (EIS) for RTP South and the Towns of Cary, Apex and Morrisville in Wake
County for the Increase in Interbasin Transfer for the Haw River Basin to the Neuse River Basin (CH2M HILL,
2000) and the 2001 Record of Decision (ROD), which predicted no significant direct impacts and are the
basis for the 2001 IBT Certificate.
The Towns and Wake County are requesting a modification of the 2001 IBT Certificate to meet three
objectives:
1. Modify the basis of the IBT limit from a maximum day IBT calculation to IBT calculated as the daily
average of a calendar month in accordance with the changes to GS 143-215.22L (regulation of surface
water transfers) based on Session Law 2013-388. (Note: otherwise stated, IBT in this document means
IBT calculated as the daily average of a calendar month)
2. Include, at the request of DWR, transfers to the Cape Fear River subbasin (consumptive uses in the Town
of Apex utility service area) so that the modified certificate addresses transfers from the Haw River
subbasin to both the Neuse and Cape Fear River subbasins.
3. Base the certificate on an updated 30-year planning period to address the Towns’ and Wake County’s
IBT needs through 2045 (the 2001 IBT Certificate was based on a 30-year planning period ending in
2030).
As has been reviewed with DWR, there are no alternatives included in the EA to modifying the 2001 IBT
Certificate to meet the first two objectives listed above: (1) comply with new law and (2) satisfy the request
from DWR. These modifications are consistent with the 2013 revisions to GS 143-215.22L and reflect a
change in perspective by DWR regarding the inclusion of consumptive transfers to the Cape Fear River basin
that in and of themselves are below the threshold required for an IBT certificate. It is assumed that a
“Updated 2001 IBT Certificate” would limit IBT to 22 mgd (now measured as the average day of a calendar
month), equivalent to the 24 mgd maximum day IBT limit, from the Haw River subbasin to the Neuse River
or Cape Fear River subbasins, based on the same 2030 expected conditions as the 2001 IBT Certificate. In
the context of this EA, references to the proposed IBT certificate modification mean proposed changes to
the Updated 2001 IBT Certificate. References to “no increase in IBT” means no increase from the Updated
2001 IBT Certificate. To meet the third objective – supplying water needs through 2045 - the Towns and
EXECUTIVE SUMMARY
ES-2
Wake County are requesting an IBT certificate modification that would allow increased transfers up to 33
mgd from the Haw River subbasin.
This Draft Environmental Assessment (EA) identifies and discusses the direct effects of the proposed IBT
certificate modification on both the source and receiving basins, and the Towns’ Utility Service Areas.
Potential direct effects on water resources, soils, wildlife resources, aquatic resources, land cover,
agricultural land and prime farmland, forested resources, public lands and scenic and natural areas,
archaeological and historic resources, air quality, noise levels, and toxic substances were evaluated. Also
evaluated were the project alternatives ranging from no action (continuing under the Updated 2001 IBT
Certificate) to the proposed IBT certificate modification (increase in IBT from the Updated 2001 IBT
Certificate), and alternatives to avoid an increase in IBT.
This EA concludes that the direct effects of the proposed IBT certificate modification on both the source
and receiving basins would be insignificant. The proposed IBT certificate modification will not significantly
change Jordan Lake elevations, water quality or water supply pool storage volumes, downstream flows,
downstream users’ water supply availability, or downstream water quality in the source or receiving basins.
Based on the hydrologic modeling, there are noticeable changes in a number of the reviewed hydrologic
indicators, but primarily as a result of future water withdrawals within the Cape Fear River basin and full
utilization of the Jordan Lake water supply pool. The Towns’ existing discharges or permits in the receiving
basins will not be expanded as a result of the proposed IBT certificate modification. No significant direct
effects to environmental resources are expected. This EA includes a summary of Towns’ mitigation
programs in place to minimize the effect of their IBT.
The proposed increase in IBT will support growth and development that is expected to occur in the source
and receiving basins, consistent with the Towns’ land use plans. The assessment of secondary and
cumulative impacts (SCI) is presented in the Towns’ Secondary and Cumulative Impact Master Management
Plan (SCIMMP), which is currently being updated. The SCIMMPs include a comprehensive description of
mitigation programs to avoid or minimize SCI to environmental resources that could occur with the Towns’
land use plans and implementation of projects in the Towns’ infrastructure master plans. The proposed
increase in IBT is consistent with the plans addressed in the SCIMMPs.

1-1
SECTION 1 Background and Project Description
1.1 Background
Since the mid-1990s the Towns of Apex, Cary, and Morrisville and Wake County (on behalf of the Wake
County portion of Research Triangle Park [RTP South]) have been cooperatively working to develop and
manage their water resources. The Towns, Wake County, and RTP South cooperate under various
organizational arrangements for raw water supply, water treatment, water distribution, wastewater
collection, wastewater treatment, reclaimed water distribution, and interbasin transfer (IBT). Together, the
Towns and Wake County have been planning for a secure long-range future water supply for their customers
and responsible water management, including IBT.
The water and wastewater utility systems serving customers throughout the Towns and RTP South are
managed by the Towns of Apex and Cary. Apex is responsible for service within its own urban service area,
and Cary is responsible for service provision for its own urban service area as well as that of Morrisville
(merged its utility with the Town of Cary in 2006), RTP South and Raleigh–Durham International Airport
(RDU Airport). The Town of Morrisville and RTP South no longer hold public water system identification
codes with the North Carolina Department of Environment and Natural Resources (NCDENR), Division of
Water Resources (DWR).
Exhibit 1-1 presents the Towns’ long range urban service areas, which are split between the Cape Fear and
Neuse River basins, with the Cape Fear River basin further divided into the Haw River and Cape Fear River
subbasins, in accordance with North Carolina General Statute (GS) 143-215.22G. Exhibit 1-2 illustrates water
movement within the service areas and how these movements relate to the basin boundaries defined in
GS 143-215.22G.
1.1.1 Water Supply
The water supply for the Towns and RTP South is B. Everett Jordan Lake (Jordan Lake) on the Haw River in
the Haw River subbasin of the Cape Fear River basin. The Towns of Apex and Cary jointly have a water
supply allocation issued by the Environmental Management Commission (EMC). In addition, the Town of
Cary administers the individual water supply allocations of the Town of Morrisville and Wake County. The
allocations for the Towns and Wake County by the EMC total 39 percent of the water supply pool (with an
assumed safe yield of 39 million gallons per day [mgd] based on DWR’s current calculation) and have
individual allocations as follows:
 Cary/Apex – 32 mgd (23.5 mgd/8.5 mgd as subdivided by the Towns, respectively)
 Morrisville – 3.5 mgd
 Wake County for RTP South – 3.5 mgd
1.1.2 Water Treatment and Distribution
The Towns of Apex and Cary jointly own the Cary/Apex Water Treatment Facility (CAWTF), which has a
current maximum day treatment capacity of 40 mgd. Operated by the Town of Cary, the plant meets the
water needs of the entire combined service area. The combined 2012 raw water demand of the Towns’
service area was approximately 20 mgd on an annual average day basis and 30 mgd on a maximum day
basis.
An expansion of the CAWTF to 56 mgd is currently under construction and will be supported by current
Jordan Lake water supply allocations. The expanded facility is expected to be online in 2016. An
environmental assessment (EA) has been completed for this expansion and a Finding of No Significant
Impact received.
1 BACKGROUND AND PROJECT DESCRIPTION
1-2
The Towns distribute this water supply from the Haw River subbasin to customers throughout their service
areas in the Haw River and Cape Fear River subbasins and the Neuse River basin. The Town of Cary serves
customers in both the Haw River subbasin of the Cape Fear River basin and the Neuse River basin. The
service area for the Town of Apex includes portions of all three basins (Exhibit 1-1).
1.1.3 Wastewater Collection and Discharge
The Towns currently discharge wastewater into the Neuse River basin and transfer wastewater back to the
Haw River subbasin via the Durham County Triangle Wastewater Treatment Plant (Triangle WWTP). The
Western Wake Regional Water Reclamation Facility (WWRWRF) has begun operations and by 2015 all flow
will be redirected from the Triangle WWTP to the WWRWRF, as discussed below. These facilities are shown
in Exhibit 1-1; how water is moved to these facilities and where they discharge is illustrated in Exhibit 1-2:
 Town of Cary:
- North Cary Water Reclamation Facility (WRF) (National Pollutant Discharge Elimination System
[NPDES] Permit: NC0048879) – permitted and built capacity of 12 mgd; discharges to Crabtree
Creek in the Neuse River basin
- South Cary WRF (NPDES Permit: NC0065102) – permitted capacity of 16 mgd with built capacity of
12.8 mgd; discharges to Middle Creek in the Neuse River basin
 Town of Apex:
- Apex WRF (NPDES Permit: NC0064050) – permitted and built capacity of 3.6 mgd; discharges to
Middle Creek
 Towns of Apex, Cary and Morrisville (joint ownership as Western Wake Partners; Cary owns the portion
serving Morrisville):
- WWRWRF (NPDES Permit: NC0088846) – currently beginning operation with a design capacity of 18
mgd and permitted capacity to 30 mgd; began discharging to the Cape Fear River in August 2014.
The wastewater flows generated from Cary’s portion of the WWRWRF service area were directed to the
Triangle WWTP for treatment and discharge pending the construction of the WWRWRF. The yearly average
flow sent to the Triangle WWTP is estimated at approximately 2.2 mgd. By late 2014, flows from this service
area will no longer be pumped to the Triangle WWTP; instead, the flows will go to the WWRWRF for
treatment and discharge to the Cape Fear River and the Towns’ agreement with Durham County for
wastewater treatment will expire.
All wastewater flows within the Town of Apex’s wastewater service area were directed to the Apex WRF
prior to the WWRWRF coming online, but a portion of the flows will be sent to the WWRWRF by 2015. This
shifts a portion of the Town’s wastewater discharge from the Neuse River basin to the Cape Fear River
subbasin.
1.1.4 Reclaimed Water
The Towns of Apex and Cary have permits for reclaimed water, although the Town of Apex has not had the
opportunity to use it to date. Reclaimed water programs will continue to be a critical element of the Towns’
water resources management portfolio to meet current and future water supply needs, to extend the life
span of the CAWTF capacity by reducing potable water demands, and to reduce nutrient discharges into
streams.
The Town of Cary is permitted to divert up to 5 mgd of treated effluent to its reclaimed water system.
Currently, the Town provides approximately 0.3 mgd on an annual average day basis and in excess of 1 mgd
on a seasonal peak day. The system, as illustrated in Exhibit 1-2, consists of the following:
1 BACKGROUND AND PROJECT DESCRIPTION
1-3
 South Cary Reclaimed Water Service Area: Located in the Neuse River basin and fed with reclaimed
water from the South Cary WRF.
 North Cary Reclaimed Water Service Area:
- Eastern distribution system: Located in the Neuse River basin and fed with reclaimed water from the
North Cary WRF.
- Western distribution system: Located in the Haw River subbasin, serving facilities in RTP South and
western Cary; the system is being extended farther south to Thomas Brooks Park. This system will
eventually be connected with the eastern distribution system and fed by the North Cary WRF;
currently, reclaimed water is supplied to this system from the Triangle WWTP.
1.1.5 Interbasin Transfer
The Towns of Apex, Cary, Morrisville, and Wake County (for RTP South), are subject to an IBT certificate
issued by the EMC in 2001 (“2001 IBT Certificate”). This certificate is required by North Carolina law,
because wastewater discharges and consumptive uses occur in receiving basins that differ from the Towns’
water supply source basin, the Haw River subbasin of the Cape Fear River basin. The 2001 IBT Certificate
limits transfers from the Towns’ water supply source basin, the Haw River subbasin (Jordan Lake), to the
Neuse River basin to 24 mgd on a maximum day basis. The Towns’ 2001 IBT Certificate is included in
Appendix A.
The Towns have maintained compliance with the 2001 IBT Certificate since it was issued, including the
maximum day limit and eight additional conditions. Compliance with the transfer limit and certificate
conditions is detailed in each Annual Report on Interbasin Transfers for RTP South and the Towns of Apex,
Cary, and Morrisville, which is submitted to the DWR annually. A copy of the Towns’ 2013 annual report is
included in Appendix B. No impacts have been identified as a result of the ongoing transfers. This is
consistent with both the 2000 environmental impact statement (EIS) (CH2M HILL, 2000) and the 2001
Record of Decision (ROD), which predicted no significant direct impacts and are the basis for the 2001 IBT
Certificate.
Condition 1 of the 2001 IBT Certificate required the Towns, after 2010, to return a portion of the water
transferred from the Haw River subbasin to the Neuse River basin back to either the Haw River or Cape Fear
River subbasins in accordance with a formula in the 2001 IBT Certificate. The Towns met this condition from
2011 through late 2014 by Cary transferring wastewater to the Triangle WWTP (2.2 mgd on average day
basis) per an Interlocal Agreement between Cary and Durham County. The Triangle WWTP discharges to
Northeast Creek in the Jordan Lake watershed (Haw River subbasin), as illustrated in Exhibit 1-1. Beginning
in 2014 with the startup of the WWRWRF, Apex, Cary, and Morrisville (Western Wake Partners) have
continued meeting this condition with the discharge of wastewater from the WWRWRF directly to the Cape
Fear River.
The 2001 IBT Certificate does not address IBT from the Haw River subbasin to the Cape Fear River subbasin,
because the amount of that transfer has not reached the threshold requiring a need for a certificate, and
based on DWR approaches to IBT when that certificate was issued. A transfer – entirely due to consumptive
use – is occurring, because a portion of the Town of Apex’s service area is within the Cape Fear River
subbasin. The current transfer levels are still significantly lower than the level in GS 143-215.22(l)(1)(a) that
would necessitate an IBT certificate (2 mgd, calculated as a daily average of a calendar month, or 3 mgd as a
daily maximum). However, based on the cumulative IBT reporting requirements outlined in G.S. 143-
215.22L DWR has now requested that this transfer be included in a modified IBT certificate.
1.1.6 Regional Water Supply Planning
The Towns have for many years worked together to plan for water supply and other water resources
management needs. Most recently, the Jordan Lake Regional Water Supply Partnership (also known as the
Jordan Lake Partnership [JLP]) was created in 2009 by jurisdictions and water systems in the Triangle region
1 BACKGROUND AND PROJECT DESCRIPTION
1-4
for the primary purpose of jointly planning for the expanded use of available water supply in Jordan Lake.
Members of the JLP include the Towns of Apex, Cary, and Morrisville; the Cities of Durham, Raleigh, and
Sanford; the Towns of Hillsborough, Holly Springs, and Pittsboro; Chatham, Durham, and Wake Counties;
and the Orange Water and Sewer Authority (OWASA). The Triangle Region Water Supply Plan (Triangle J
Council of Governments, 2012) compiled by the JLP identifies existing and future service areas for the
region’s water systems, identifies future water supply demands, examines current water supply sources and
yields, and evaluates strategies for meeting future needs. The information in the Triangle Region Water
Supply Plan is used in this EA to quantify expected future need and effect of the alternatives. In addition to
the regional water supply plan, the JLP is also investigating the interconnectivity of all members’ water
systems to allow water supply sharing on a regular or emergency basis.
The Triangle J Council of Governments facilitates the Regional Water Conservation and Efficiency
Committee, which includes the Cities of Raleigh and Durham, the Towns of Apex and Cary, and OWASA. The
group began meeting in 2009 to discuss increasing regional consistency in both year-round water
conservation measures and water shortage response plans. Participants adopted the same water shortage
response framework, and while there are some differences in specific programs, many adopted similar year-
round conservation measures.
The Towns’ continued planning efforts and participation in regional planning efforts demonstrates the
Towns’ commitment to the long-term viability of the region’s water supply for all communities.
1.2 Project Description
The Towns and Wake County are requesting a modification of the 2001 IBT Certificate for three primary
purposes:
1. Modify the basis for the IBT limit from a maximum day IBT calculation to IBT calculated as the daily
average of a calendar month, in accordance with the changes to GS 143-215.22L (regulation of surface
water transfers) based on Session Law 2013-388.
2. Include, at the request of DWR, transfers to the Cape Fear River subbasin (consumptive uses in the Town
of Apex service area) so that the modified certificate addresses transfers from the Haw River subbasin to
both the Neuse and Cape Fear River subbasins.
3. Base the certificate term on an updated 30-year planning period to address the Towns’ and Wake
County’s IBT needs through 2045 (the 2001 IBT Certificate is based on a 30-year planning period ending
in 2030).
The Towns are requesting that the proposed IBT certificate modification allow transfers up to 33 mgd from
the Haw River subbasin. Concurrent with the certificate modification, the Towns will be applying for
increased water supply allocations from Jordan Lake and requesting that the allocations assigned to the
Town of Morrisville and Wake County to be assigned to the Town of Cary as the owner of all water,
wastewater, and reclaimed water infrastructure in these areas. The Towns and Wake County have been
actively involved in the Round 4 Jordan Lake Allocation process. The requested increases in allocations will
also be based on a 30-year planning horizon, through 2045. The Towns intend to use their three existing
WRFs and the new WWRWRF to treat wastewater and to continue significant water resources planning,
conservation efforts, and the development of management tools to reduce IBT.
As has been reviewed with DWR, there are no alternatives included in the EA to modifying the 2001 IBT
Certificate to meet the first two objectives listed above: (1) comply with new law and (2) satisfy the request
from DWR. These modifications are consistent with the 2013 revisions to GS 143-215.22L and reflect a
change in perspective by DWR regarding the inclusion of consumptive transfers to the Cape Fear River basin
that in and of themselves are below the threshold required for an IBT certificate. It is assumed that an
“Updated 2001 IBT Certificate” would limit IBT to 22 mgd (now measured as the average day of a calendar
month) from the Haw River subbasin to the Neuse River or Cape Fear River subbasins, based on the same
1 BACKGROUND AND PROJECT DESCRIPTION
1-5
2030 expected conditions as the 2001 IBT Certificate. In the context of this EA, references to the proposed
IBT certificate modification mean proposed changes to the Updated 2001 IBT Certificate. References to “no
increase in IBT” means no increase from the Updated 2001 IBT Certificate. To meet the third objective –
supplying water needs through 2045 - the Towns and Wake County are requesting an IBT certificate
modification that would allow increased transfers up to 33 mgd from the Haw River subbasin.
1.2.1 Study Area
This EA provides the supporting documentation for an IBT certificate modification for the identified Study
Area focusing on the direct environmental effects of the water transfer. The Towns’ water supply source
basin, receiving basins (within the Towns’ service areas), and downstream water bodies are included in the
Study Area defined in Exhibit 1-3. This Study Area is generally described as follows:
 Source Basin:
- Haw River subbasin (source basin): Includes Jordan Lake and the watershed areas of 03-06-05 and
03-06-06, and the Haw River Arm of Jordan Lake. Downstream, the Study Area includes the Haw and
Cape Fear Rivers from the Jordan Lake Dam to the Town of Lillington. Within this reach, the
WWRWRF discharges into the Cape Fear River, reducing IBT, per administrative rule 15A North
Carolina Administrative Code (NCAC) 02E.401(b).
 Receiving Basin(s):
- Neuse River basin (receiving basin): The area contained within the outer boundary of the Towns’
utility service areas and facilities (North Cary, South Cary, and Apex WRFs) contributing to IBT.
Crabtree Creek and Middle Creek extending from the Towns’ service area boundaries to their
individual confluences with the Neuse River are also included.
- Cape Fear River subbasin (receiving basin): The area contained within the outer boundary of the
Town of Apex’s urban service area contributing to IBT.
This Study Area is generally the same as that used in the 2000 EIS (CH2M HILL, 2000) prepared for the 2001
IBT Certificate with the addition of the Cape Fear River subbasin (area south of U.S. 1) and an area in the
Neuse River basin directly north of the South Cary WRF. In addition, the water and wastewater facilities
presented in the 2000 EIS and its associated ROD, which are the bases of the 2001 IBT Certificate, are exactly
the same as those in the future water supply and IBT scenarios presented in Exhibits 1-1 and 1-3.

1 BACKGROUND AND PROJECT DESCRIPTION
1-6

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!
#
G
G
G
G
G
G
G
Cape Fear
River Basin
Neuse River
Basin
Haw River
Basin
Harris Lake
B. Everett
Jordan Lake
WWRWRF
Triangle
WWTP
South Cary WRF
Cary/Apex WTP
North Cary WRF
Apex WRF
Northeast Creek
Crabtree Creek
Middle Creek
Swift Creek
Buckhorn Creek Black Creek
New Ho
pe Cre
ek
EXHIBIT 1-1Service Area Map
Interbasin Transfer (IBT) Environmental Assessment
WAKE
JOHNSTON
DURHAM
FRANKLIN
Legend
G Wastewater Discharge
!Cary/Apex WTP
#Surface Water Intake
Major Waterways
Major Waterbodies
County Border
River Basin Boundary
Urban Service Areas
Apex
Cary
Morrisville
RDU Airport
RTP South
$
05.511Miles
1 BACKGROUND AND PROJECT DESCRIPTION
1-8

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1 BACKGROUND AND PROJECT DESCRIPTION
1-9
EXHIBIT 1-2
Water Movement Illustration

1 BACKGROUND AND PROJECT DESCRIPTION
1-10

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#
#
!
!
!#
G
G
G
G
G
G
G
Cape Fear
River Basin
Neuse River
Basin
Haw River
Basin
Harris Lake
B. Everett
Jordan Lake
Falls Lake
WWRWRF
Triangle WWTP
South Cary WRF
Cary/Apex WTP
North Cary WRF
Apex WRF
Cape Fear River
Haw River
Northeast Creek
Crabtree Creek
Middle Creek
Swift Creek
Buckhorn
Creek
Black Creek
Ne
w Ho
pe
Creek
EXHIBIT 1-3Study Area Map
Interbasin Transfer (IBT) Environmental Assessment
Legend
G Wastewater Discharge
!Water Treatment Plant
#Surface Water Intake
Major Waterways
Major Waterbodies
River Basin Boundary
Study Area Boundary
County Border
Urban Service Areas
Apex
Cary
Morrisville
RDU Airport
RTP South
$
01020Miles
1 BACKGROUND AND PROJECT DESCRIPTION
1-12

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2-1
SECTION 2 Project Purpose and Need
2.1 Historical Growth in Population and Water Demand
Past population growth and water demand trends of the Towns of Apex, Cary and Morrisville, and RTP South
have been a result of strong, sustained growth driven by the area’s thriving business climate, technology
environment, major universities, and attractive quality of life. The Towns’ growth and water usage profile
reflects the economic drivers and quality of life desired by each community’s residents. Changes to this
profile may occur over short periods of time, because of economic or demographic shifts (such as the recent
recession) and droughts (e.g., 2002, 2007–2008), but the long-term trends indicate a steadily rising
population and water demand.
The Towns recognize that understanding the water usage patterns of its customers is necessary to
understand the potential implications of changing trends. Both Towns have completed (individually and
collectively) several studies to understand customer water usage and project future water demand, as
documented in the Towns’ Long Range Water Resource Plan (LRWRP) (CH2M HILL and Brown and Caldwell,
2013).
Exhibit 2-1 presents historical population estimates from 2001 through 2012 for the Towns of Apex, Cary,
and Morrisville. RTP South has no residential population.
EXHIBIT 2-1
Historical Population Estimates, 2001-2012
Year Town of Apexa Town of Caryb Town of Morrisvillec
2001 25,136 101,465 9,736
2002 26,919 104,144 10,489
2003 28,139 107,418 11,736
2004 29,372 108,880 12,981
2005 30,381 112,804 14,235
2006 31,254 118,709 14,955
2007 33,780 126,958 15,593
2008 34,766 133,788 16,189
2009 3,5054 138,672 16,463
2010 37,886 137,979 18,447
2011 38,728 140,849 20,797
2012 40,003 143,423 21,223
a Data source: Town of Apex, 2012
b Data source: Town of Cary, 2012
c Data source: Town of Morrisville, 2012a
2 PROJECT PURPOSE AND NEED
2-2
Exhibit 2-2 summarizes the historical annual average daily raw and finished water demand for the Town of
Cary’s service area, inclusive of the Town of Morrisville, RTP South, and RDU Airport, and the Town of Apex’s
water service area from 2001 through 2013.
EXHIBIT 2-2
Historical Annual Average Daily Raw and Finished Water Demand for the Towns of Apex and Cary, 2001–2013
Year Annual Average Daily Raw Water
Demand (mgd) a
Annual Average Daily Finished Water
Demand (mgd) a
2001 16.3b 14.2
2002 16.9 14.9
2003 15.9 13.9
2004 17.0 14.8
2005 18.4 15.6
2006 17.6 15.7
2007 19.8 17.9
2008 18.7 16.1
2009 19.5 16.1
2010 20.9 17.1
2011 20.0 17.2
2012 19.3 16.5
2013 18.5 16.3
a Data source: Town of Cary, 2014
b In 2001 the Town of Cary purchased finished water from the Cities of Raleigh and Durham; therefore, raw water demand has
been estimated for this year based on an assumed ratio of raw water demand to finished water demand.
2.2 Future Population and Water Demand Forecast
2.2.1 Future Population Forecast
The population forecast presented in Exhibit 2-3 represents the portion of the population within each
Town’s utility service area that will be provided utility services through the year 2045. The projections do
not include the portion of the population within each Town’s service area that is currently on and will
remain on private water well and septic systems through 2045. Each Town is planning for all residences
with a well and septic system to be connected over time to the centralized utility system from 2020 through
2060. These population forecasts were an input to (Apex) or developed from (Cary) the future water
demand forecast, which is described in Section 2.2.2. The population projections included for Morrisville
(included in Cary’s service area) correspond with the Town of Morrisville’s land use plan and Planning
Department projections, which are based on State Demographers Certified Estimates (Town of Morrisville,
2012b).

2 PROJECT PURPOSE AND NEED
2-3

EXHIBIT 2-3
Utility Service Area Population Forecast, 2015–2045
Year Town of Apex Utility Service Area a Town of Cary Utility Service Area
(including Morrisville) b
2015 45,400 170,360
2020 53,100 188,340
2025 63,750 206,000
2030 74,400 221,330
2035 87,450 235,200
2040 100,500 242,760
2045 104,850 249,930
a Data source: CH2M HILL and Brown and Caldwell, 2013
b Data source: CH2M HILL and Brown and Caldwell, 2013 (Cary); Town of Morrisville, 2012b (Morrisville)
2.2.2 Water Demand Forecast
2.2.2.1 Calculations and Methodology
The following summarizes the basis of each Town’s water demand forecast methodology:
 Town of Cary:
- Projected water demands were developed for existing and future conditions based on water meter
billing data and parcel-level future development and land use information, respectively. The total
future system finished water demand consists of the existing demand (based on 2010 water meter
data), projected future demand, future non-revenue water, operational requirements, and bulk
water sales. The projections were developed for the Town’s water system service area, which is
defined as the combination of the Towns of Cary and Morrisville urban service areas, RDU Airport,
and RTP South. Demand projections for RTP South were provided by Wake County. All existing
reclaimed water customers, reclaimed water system expansion customers (construction of
reclaimed water pipelines is underway to supply these customers who are currently using potable
water), and all of RTP South irrigation demand are excluded from projections of future potable
water demand.
 Town of Apex:
- Projected water demands were developed for existing and future conditions based on Town-
developed population projections, spatially distributed based on Capital Area Metropolitan Planning
Organization traffic analysis zone data. For areas within the Town’s urban service area where no
Town-derived population projections exist, a land capacity analysis was completed based on future
land use. For non-residential development projections, the projection of future land use types and
acreages was used. Unit consumption factors were used with the population and land use
projections to develop projected water demand. In addition, projections of future non-revenue
water and operational requirements were included in the total future system finished water
demand.
The water demand forecasts developed are representative of the influence each Town’s current water
resources management programs and policies have on water demand, based on the assumption that they
will continue in the future absent of any influence of major technology or regulatory changes. Given the
significance of the historical investments and successes achieved with the current programs and policies,
2 PROJECT PURPOSE AND NEED
2-4
these forecasts do not consider new programs or policies in the future. The Towns remain committed to
implementing new programs, as they are determined to be effective and appropriate in the future, as
recommended in the LRWRP; these programs will increase the reliability with which the Towns can meet
customer demands and comply with a modified IBT certificate. Further details regarding the forecasting
calculations and methodology can be found in the LRWRP (CH2M HILL and Brown and Caldwell, 2013).
Variability is an inherent part of water demand and uncertainty is inherent in any type of forecast. With an
understanding of the variables that influence the need for future water supply and future IBT, the Towns
incorporated several factors to represent both variability and uncertainty in the forecast of future water
demand as part of the development of the LRWRP. These factors included the following:
 Growth rate (rate at which new development occurs)change
 Annual variability in water use due to weather (change in average annual use)
 Amount of process water used during the treatment process
 Non-revenue water (percentage of total finished water demand)
 Maximum day peaking factors (maximum day versus annual average daily)
Further details regarding the forecasting analysis can be found in Section 2 and Appendix A3 of the LRWRP.
2.2.2.2 Water Demand Forecast
Exhibit 2-4 presents 2012 and 2013 data as well as the annual average raw water demand expected values,
2015 through 2045, that were a result of the forecasting. Expected values are a statistical measure of the
likely outcome under conditions of future variability and uncertainty, reflecting expected average future
conditions.
The increase in water demand from the actual data for 2012 and 2013 to the 2015 raw water demand
projection is related to the inclusion of the demands associated with approved site plans. Once the Towns’
have committed water supply to developments through the site plan approval process, it necessary to
assume that the demand could come online as soon as possible for the purposes of water supply planning.
EXHIBIT 2-4
Annual Average Daily Raw Water Demand Forecast Expected Values, 2012–2045

Annual Average Daily Raw Water Demand (mgd)
2012 a 2013 a 2015 b 2020 b 2025 b 2030 b 2035 b 2040 b 2045 b
Towns of Cary and
Morrisville, RDU Airport,
and RTP South
15.9 15.3 19.7 23.5 27.0 29.7 32.3 33.7 34.5
Town of Apex 3.4 3.2 4.4 5.6 6.5 7.6 8.8 10.0 10.6
Total Demand 19.3 18.5 24.1 29.1 33.6 37.3 41.2 43.7 45.1
Note: Numbers may not sum because of rounding.
a 2012 and 2013 data represent actual flow data at the CAWTF.
b Data source: CH2M HILL and Brown and Caldwell, 2013
2.2.3 Future Wastewater Flow Forecast
The methodology used to derive the wastewater flow forecast was based on the same basic methodology
for both the Town of Apex and Town of Cary service areas: wastewater flows returned to the various WRFs
2 PROJECT PURPOSE AND NEED
2-5

as a percentage of the respective water demands. Further detail regarding the wastewater flow forecast
can be found in the LRWRP (CH2M HILL and Brown and Caldwell, 2013).
Exhibit 2-5 presents the forecast annual average daily wastewater flow expected values for each WRF,
outlined in Section 1, and discharge basin for 2015 through 2045.
EXHIBIT 2-5
Annual Average Daily Wastewater Flow Forecast Expected Values by Town and WRF Service Area, 2015–2045
WRF Service
Area
Discharge
Basin
2015 a
(mgd)
2020 a
(mgd)
2025 a
(mgd)
2030 a
(mgd)
2035 a
(mgd)
2040 a
(mgd)
2045 a
(mgd)
Towns of Cary
and Morrisville,
RDU Airport, and
RTP South
North Cary Neuse 8.0 9.2 10.1 10.9 11.6 12.0 12.4
South Cary Neuse 5.3 5.8 6.4 6.9 7.4 7.7 8.1
Western Wake Cape Fear 2.9 4.0 5.0 5.7 6.5 7.0 7.3
Subtotal 16.2 19.0 21.5 23.5 25.5 26.7 27.8
Town of Apex
Middle Creek Neuse 1.0 1.1 1.3 1.5 1.7 1.8 1.9
Western Wake Cape Fear 2.1 2.9 3.5 4.0 4.7 5.3 5.7
Subtotal 3.1 4.8 5.5 6.4 7.1 7.9 7.6
Total Flow 19.3 23.0 26.3 29.0 31.9 33.8 35.4
Note: Values may not sum because of rounding.
a Data source: CH2M HILL and Brown and Caldwell, 2013
2.2.4 Interbasin Transfer
At the time it was issued, the 2001 IBT Certificate was projected to be sufficient for transfers through 2030.
However, guidance from DWR at that time included a methodology for estimating future IBT requiring a
number of assumptions including: the timing and magnitude of future water demands in the Haw River
subbasin, wastewater discharges to the Cape Fear River subbasin, timing and magnitude of consumptive use
in the Haw, Cape Fear, and Neuse River subbasins, potable water offsets from reclaimed water usage, and
the percentage of reuse in the Haw River subbasin. Subsequent monitoring using daily data has provided
better understanding of these assumptions, indicating that the methodology and assumptions used for
calculating the maximum day IBT for the current certificate significantly under-estimated the IBT value.
Exhibit 2-6 presents the estimated annual average and maximum day IBT for 2001 through 2013 compiled
from daily monitoring data (Town of Cary, 2014).
EXHIBIT 2-6
Historical IBT Estimates for the Towns of Apex and Cary, 2001–2013
Year Annual Average IBT (mgd) Maximum Day IBT (mgd)
2001 6.8 15.0
2002 13.5 22.5
2003 13.4 17.8
2004 14.2 22.6
2005 145 19.6
2 PROJECT PURPOSE AND NEED
2-6
EXHIBIT 2-6
Historical IBT Estimates for the Towns of Apex and Cary, 2001–2013
Year Annual Average IBT (mgd) Maximum Day IBT (mgd)
2006 14.3 20.8
2007 15.9 23.5
2008 14.1 20.9
2009 14.0 20.4
2010 14.4 22.3
2011 14.1 21.7
2012 13.9 22.7
2013 13.8 19.2
Data source: Town of Cary, 2014
In accordance with the recent legislative changes to GS 143-215.22L, the forecast of IBT is calculated as a
daily average of a calendar month (instead of on a maximum day basis) and, for the month in which IBT is
expected to be highest, is generally described by the following formula:
IBTx = Withdrawal from Source basinx - Return to Source basinx
Return to Source Basinx = (Total Consumptive Usex * % of Total Demand in Source
River Basinx) + Source River Basin Wastewater Dischargex
Total Consumptive Usex = 50% of the daily average of a calendar month
In which 'x' represents a future year
NOTE: The Return to Source Basin calculation could include reclaimed water use in
the source basin. Reclaimed water usage has not been included in the
IBT projection since reclaimed water use is less predictable than
potable water use and there are limits on its availability during emergencies.
Exhibit 2-7 presents the forecast of future IBT for the transfer from the Haw River subbasin to the Neuse
River basin through 2045. Exhibit 2-8 presents the forecast of future IBT for the transfer from the Haw River
subbasin to the Cape Fear River subbasin. Exhibit 2-9 presents the total IBT from the Haw River subbasin to
both the Neuse River basin and the Cape Fear River subbasin. The IBT forecast presented in each of these
tables is the maximum daily average of a calendar month (the maximum average day IBT as compared to all
months in a calendar year), referred to as the maximum month average day. The future IBT forecast is
based on the WWRWRF operation beginning in 2014 and on continuation of the Towns’ current water
resources management policies and programs.
Exhibits 2-7, 2-8, and 2-9 present transfers developed from the forecast analyses under conditions driven by
weather and usage patterns that deviate from average, or expected value, conditions. IBT forecasts based
on average future conditions would not accurately reflect the range of transfers that can be reasonably be
anticipated to occur under the full range of anticipated conditions. Because an IBT certificate limit cannot
ever be exceeded, the maximum IBT has been calculated as the transfer resulting from conditions outside
the average which could reasonably be expected to occur.

2 PROJECT PURPOSE AND NEED
2-7

EXHIBIT 2-7
Forecast of IBT from the Haw River Subbasin to the Neuse River Basin, 2012–2045, Maximum Month Average Day
IBT (mgd)
2012a 2013 a 2015 2020 2025 2030 2035 2040 2045
17.0 16.0 19.4 22.1 25.2 27.5 29.8 30.7 31.0
a 2012 and 2013 IBT based on actual IBT monitoring data
EXHIBIT 2-8
Forecast of IBT from the Haw River Subbasin to the Cape Fear River Subbasin, 2012–2045, Maximum Month Average Day
IBT (mgd)
2012a 2013 a 2015 2020 2025 2030 2035 2040 2045
<0.1 <0.1 0.4 0.7 0.9 1.2 1.4 1.7 2.0
a 2012 and 2013 IBT based on actual IBT monitoring data
EXHIBIT 2-9
Forecast of IBT from the Haw River Subbasin to the Neuse River Basin and Cape Fear River Subbasin, 2012–2045, Maximum
Month Average Day
IBT (mgd)
2012a 2013 a 2015 2020 2025 2030 2035 2040 2045
17.1 16.1 19.8 22.8 26.1 28.7 31.1 32.4 33.0
a 2012 and 2013 IBT based on actual IBT monitoring data
According to the forecasts of future raw water supply needs and IBT, with the continuation of Jordan Lake as
the Towns’ primary water supply, the LRWRP identified the need to petition the State of North Carolina
(State) for a modification of the 2001 IBT Certificate. Subsequently, the IBT law was modified. The Towns
submitted a notice to the EMC on October 17, 2013 of the intent to request modification of the IBT
certificate in accordance with NCGS 143-215.22L, as amended by Session Law 2013-388. A copy of the
Notice of Intent is included in Appendix C.

2 PROJECT PURPOSE AND NEED
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3-1
SECTION 3 Alternatives Evaluation
3.1 Description of Alternatives
For the purposes of this EA, there is no alternative to modifying the 2001 IBT Certificate to meet two of the
three objectives outlined in Section 1.2: complying with changes in law (including change from maximum
day to calendar month basis for IBT limit) and satisfying the request from DWR to include transfers from the
Haw River subbasin to the Cape Fear River subbasin. Accordingly, in this section when alternatives are
described and compared, it is assumed the Towns would at a minimum receive a “Updated 2001 IBT
Certificate” including the following, which satisfy those two objectives under the conditions presented in the
EIS on which the 2001 IBT Certificate is based:
 Maximum transfer from the Haw River subbasin to the Neuse River basin of 20 mgd.
 Maximum transfer from the Haw River subbasin to the Cape Fear River subbasin is less than 2 mgd
(through 2030).
 Total maximum transfer from the Haw River subbasin to the Neuse and Cape Fear River subbasins of 22
mgd.
Several alternatives to the proposed project were defined and evaluated for their ability to meet the Towns’
water supply needs through 2045 (the third objective for modifying the current certificate). The following
three categories of alternatives, with a total of eight water supply alternatives, were evaluated:
1. No action (Updated 2001 IBT Certificate; 22 mgd total IBT)
2. Increase IBT:
- 2a – Increase in IBT to meet 2045 demands (Proposed IBT Certificate Modification; 33 mgd total IBT)
- 2b – Increase in IBT to meet 2045 demands and use current permitted wastewater capacity (44 mgd
total IBT)
3. Avoid IBT increase (Updated 2001 IBT Certificate; 22 mgd total IBT):
- 3a – Transfer of untreated wastewater from the Neuse River basin to the WWRWRF, which
discharges to the Cape Fear River basin
- 3b – Transfer of treated wastewater effluent from the Neuse River basin to the Cape Fear River
basin
- 3c – Use a water supply source in the Neuse River basin
- 3d – Use groundwater as a water supply source
- 3e – Use additional water resources management tools
Secondary and cumulative impacts (SCI) associated with each of the alternatives that meet the purpose and
need, and mitigation plans for these impacts, are discussed in the Secondary and Cumulative Impacts Master
Management Plan (SCIMMP) for each Town (CH2M HILL, 2005a, 2005b, 2005c, 2014a, 2014b, and 2014c).
3.2 No Action (Alternative 1)
Under Alternative 1, no actions designed to meet projected demands through 2045 would be undertaken;
the Towns would receive an Updated 2001 IBT Certificate limiting transfers from the Haw River subbasin to
22 mgd. The Towns would limit future development and utility services so that no additional water would
be transferred to the Neuse River basin above 20 mgd, essentially stopping all development and any
3 ALTERNATIVES EVALUATION
3-2
increase in water use after 2016. Additional transfer to the Cape Fear River subbasin would remain less than
2 mgd.
This alternative is not considered feasible because the Towns would be unable to meet future water needs
of their customers. It is also unlikely that already-permitted development could be legally halted in order to
prevent an increase in water use and a possible exceedance of the Updated 2001 IBT Certificate without
significant and costly management measures.
3.3 Increase in Interbasin Transfer to Meet 2045 Demands (Alternative 2a) - Proposed IBT Certificate Modification
Under Alternative 2a, the Towns would increase their Jordan Lake withdrawal consistent with future water
demand projections for 2045 (pending the separate Round 4 allocation process) and update the IBT
certificate to address IBT through the 30-year planning period ending in 2045 (the previous IBT certificate
was based on a 30-year planning period ending in 2030).
Alternative 2a would meet the demands through 2045 by transferring up to 33 mgd from the Haw River
subbasin (Jordan Lake); expanding the CAWTF to 72 mgd; using existing wastewater treatment facilities; and
continuing water resources management measures to minimize IBT. The Towns intend to continue to use
their existing WRFs (North Cary, South Cary, Apex, and WWRWRF) to treat wastewater. The WWRWRF
discharge returns treated wastewater effluent to the Cape Fear River basin, thereby reducing IBT. Exhibit 1-
3 illustrates the Towns’ treatment facility locations and the Haw River, Cape Fear River and Neuse River
subbasin boundaries.
The LRWRP (CH2M HILL and Brown and Caldwell, 2013) estimates that by 2045, the WWRWRF will discharge
about 12 mgd on an annual average day basis to the Cape Fear River basin. In addition to increase the
reliability of IBT compliance, the Towns would continue using management tools such as expanding
reclaimed water infrastructure to reduce both potable water demand and wastewater discharges in the
Neuse River basin, and continuing water resources planning and conservation/ efficiency efforts.
Concurrent with the certificate modification process, the Towns will apply for increased water supply
allocations from Jordan Lake through the DWR Round 4 Jordan Lake Allocation process. The procedures to
be followed in allocating the Jordan Lake storage are outlined in 15A NCAC 2G.0500. Exhibit 3-1 provides an
overview of the Round 4 Jordan Lake Allocation process, Cape Fear River basin water supply planning, and a
Cape Fear River Hydrologic Model update, relative to the JLP regional water supply planning work. The
requested increases in allocations will be based on 2045 needs - a 30-year planning horizon. Updates to the
Cape Fear River Basin Hydrologic Model have been made and the draft 2002 Cape Fear River Basin Water
Supply Plan (NCDENR, 2002a) is also being updated as part of the Round 4 Jordan Lake Allocation process.

3 ALTERNATIVES EVALUATION
3-3
EXHIBIT 3-1
Planned Process for DWR Round 4 Jordan Lake Allocation

Alternative 2a is considered the most viable and preferred alternative, and will be analyzed further in this
EA.
3.4 Increase in Interbasin Transfer to Meet 2045 Demands and Use Current Permitted Wastewater Capacity (Alternative 2b)
Under Alternative 2b, the Towns would increase their Jordan Lake withdrawal consistent with future water
demand projections for 2045 (pending the separate Round 4 allocation process) and update the IBT
certificate to address IBT through the 30-year planning period ending in 2045 (the previous IBT certificate
was based on a 30-year planning period ending in 2030).
Alternative 2b would meet the 2045 demands by transferring up to 44 mgd from the Haw River subbasin
(Jordan Lake); expanding the CAWTF to 72 mgd; and continuing water resources management measures to
minimize IBT. In contrast to Alternative 2a, wastewater treatment would occur through expansion of the
South Cary WRF from 12.8 mgd to its permitted discharge capacity of 16 mgd, as well as continue use of
existing facilities (North Cary, Apex and Western Wake WRFs.)
Alternative 2b represents the maximum IBT that could occur within the Town’s current NPDES permit limits.
This alternative would meet the long-term demand by requesting to transfer up to 44 mgd from the Haw
River subbasin (Jordan Lake), 11 mgd greater than Alternative 2a. Under Alternative 2a, the Long Range
Water Resources Plan projects that the South Cary WRF will have about 3 mgd of unused capacity on a
Source: CH2M HILL and Brown and Caldwell, 2013

3 ALTERNATIVES EVALUATION
3-4
maximum month average day basis (compared to the current facility capacity of 12.8 mgd). In this
alternative, the South Cary WRF permitted capacity of 16 mgd is fully utilized in 2045, with a corresponding
increase in IBT, because the South Cary WRF discharges into Middle Creek within the Neuse River basin.
As with Alternative 2a, WWRWRF discharges of treated wastewater effluent to the Cape Fear River basin
would reduce IBT, though the quantity of return/discharge to the Cape Fear River basin would be less, due
to the increased utilization of South Cary WRF. Under this alternative, the WWRWRF would discharge about
5 mgd on an average day basis to the Cape Fear River basin by 2045. In addition, the Towns would continue
using management tools to reduce IBT such as expanding reclaimed water infrastructure to reduce both
potable water demand and wastewater discharges in the Neuse River basin, and continuing water resources
planning and conservation/efficiency efforts.
While this alternative fully utilizes existing treatment facilities and existing permitted discharges, it would
require additional pipeline infrastructure to route a larger portion of the wastewater collection system to
the South Cary WRF. Because Alternative 2b would increase both costs and IBT above Alternative 2a levels,
Alternative 2a is preferred.
3.5 Avoid Interbasin Transfer Increase by Sending Additional Untreated Wastewater to the WWRWRF (Alternative 3a)
Under Alternative 3a, the Towns would increase their Jordan Lake withdrawal consistent with future water
demand projections for 2045.
Alternative 3a would meet the 2045 demands by transferring up to 22 mgd (no change from the Updated
2001 IBT Certificate) from the Haw River subbasin (Jordan Lake); expanding the CAWTF to 72 mgd; and
continuing water resources management measures to minimize IBT. In contrast to Alternatives 2a and 2b,
wastewater treatment would occur through expansion of the WWRWRF, as well as use of existing facilities
(North Cary, South Cary and Apex WRFs.)
Wastewater generated in both the Neuse River basin and in the Cape Fear subbasin would be pumped to
the new WWRWRF for treatment; the treated effluent would then be discharged into the Cape Fear River
via the WWRWRF’s outfall. Ultimately, an average of approximately 9 mgd of additional untreated
wastewater (in addition to the future flows already within the areas defined for the WWRWRF service area)
would need to be pumped from the North Cary WRF, South Cary WRF, or Apex WRF service areas (or some
combination of these service areas) into the WWRWRF influent collection infrastructure to avoid the need
to increase IBT.
By 2045, the additional inflows to the WWRWRF would result in treatment and discharge of about 24 mgd
on an annual average day basis to the Cape Fear River basin from the WWRWRF. In addition, the Towns
would continue using management tools to reduce IBT such as expanding reclaimed water infrastructure to
reduce both potable water demand and wastewater discharges in the Neuse River basin, and continuing
water resources planning and conservation/efficiency efforts.
Alternative 3a would require the construction of major raw wastewater pumping facilities and wastewater
conveyance infrastructure to transfer raw wastewater from the Neuse River basin into the Cape Fear
subbasin. While the existing infrastructure may initially be sufficient to handle the additional flows,
expansion of the WWRWRF influent wastewater pumping facilities and pipelines would be required for the
modified build-out capacity requirement.
This alternative would require the expansion of the WWRWRF to be online in approximately 2029, much
earlier than currently projected, and would result in already-built capacity and investment at the Apex WRF
and North Cary WRF being underutilized.
3 ALTERNATIVES EVALUATION
3-5
Because of the significant cost increase of Alternative 3a compared to Alternative 2a and the
underutilization of existing facility capacity, this alternative is not considered fiscally responsible and will not
be further evaluated.
3.6 Avoid Interbasin Transfer Increase by Discharging Additional Treated Wastewater Effluent to the Cape Fear River Basin (Alternative 3b)
Under Alternative 3b, the Towns would increase their Jordan Lake withdrawal consistent with future water
demand projections for 2045.
Alternative 3b would meet the 2045 demands by transferring up to 22 mgd (no change from the Updated
2001 IBT Certificate) from the Haw River subbasin (Jordan Lake); expanding the CAWTF to 72 mgd; and
continuing water resources management measures to minimize IBT. This alternative would use existing
wastewater conveyance infrastructure and the Towns’ existing WRFs (North Cary, South Cary, Apex and
WWRWRFs). The wastewater treatment capacities of the Towns’ WRFs would be the same as under
Alternative 2a.
Wastewater produced in the Neuse River basin would be treated at the WRFs currently used for the Towns’
wastewater service areas, and a portion of the effluent from the WRFs would be pumped into the Haw River
or Cape Fear River subbasins for discharge. Ultimately, approximately 9 mgd of additional treated
wastewater effluent (in addition to the WWRWRF effluent discharge defined for the WWRWRF service area)
would need to be pumped from the North Cary WRF, South Cary WRF, or Apex WRF (or some combination
of these service areas) into the Haw or Cape Fear subbasins to avoid increasing IBT above the 2001 IBT
Certificate. Because of the relative proximity of the South Cary WRF and Apex WRF to the Cape Fear River
basin, compared with the North Cary WRF, transfer of effluent from these facilities appears more cost
effective.
This alternative would require the construction of major pumping facilities to transfer treated effluent from
the Apex WRF and/or South Cary WRF. A new discharge outfall would be constructed on the Cape Fear
River, because of the longer distance to the WWRWRF effluent pumping facility and because the WWRWRF
effluent pipeline capacity is not sufficient for both the current WWRWRF build-out capacity and the
additional effluent flow. It is feasible to parallel the 14.5-mile WWRWRF effluent pipeline, although costs
would be significantly higher than other discharge options. Alternative 3b could result in additional
treatment requirements at the Apex WRF and South Cary WRF, because neither facility is designed to meet
the effluent total phosphorus (TP) limits in the current WWRWRF NPDES permit. In addition, more stringent
limits for nutrients than those included in the WWRWRF NPDES permit may be required, because of nutrient
impact concerns related to new discharges in the Middle Cape Fear River basin
Because of the significant cost increase of Alternative 3b compared to Alternative 2a, this alternative is not
considered fiscally responsible and will not be further evaluated.
3.7 Avoid Interbasin Transfer Increase by Using a Water Source in the Neuse River Basin (Alternative 3c)
Under Alternative 3c, the Towns would use a water source in the Neuse River basin to meet future water
demands and comply with the Updated 2001 IBT Certificate. The current Jordan Lake Allocation would not
be increased, and IBT would not be increased above the Updated 2001 IBT Certificate. This would be
accomplished by (1) the Towns developing a new water supply source or (2) purchasing finished water and
water supply capacity from another system in the Neuse River basin. To accomplish this, approximately 10
to 12 mgd of supply from the Neuse River basin is needed.
3 ALTERNATIVES EVALUATION
3-6
3.7.1 New Water Supply Source Development
The LRWRP (CH2M HILL and Brown and Caldwell, 2013) evaluated the feasibility of pumping raw water from
Crabtree Creek and storing the water in the existing Wake Stone Corporation Triangle Quarry, which is
located north of the Interstate 40/Harrison Boulevard interchange, as shown in Exhibit 3-2. The raw water
would be treated at a new WTP that would need to be constructed nearby and distributed to customers
through the existing water system.
The quarry has the potential to provide up to 4.6 billion gallons of raw water storage at the projected final
excavated volume, although the available volume would be less if quarry mining operations were not
completed at the time this alternative would need to be initiated. Costs of the lost revenue from the
unmined rock would likely be added to the Towns’ purchase cost for the quarry. The State of North Carolina
has first right of refusal for the quarry parcel when mining is complete, so the state would have to relinquish
that right for this alternative to be implemented.
Raw water would be withdrawn under operational guidelines based on the available flows in Crabtree
Creek; the developed guidelines are not based on any specific guidance from DWR but do reflect previous
experience working with DWR on a similar supply system in the Triangle area. Based on an initial evaluation:
 Water would be withdrawn only when flows in the creek are above approximately 17 mgd.
 The maximum withdrawal capacity would be 30 mgd.
 The difference between daily water withdrawn and daily demand would refill the quarry.
 When the quarry reaches 100 percent storage capacity, withdrawals from the creek would return to
average day demand (when flows in the creek are above approximately 17 mgd).
Based on these guidelines, an average annual yield of 10 mgd is projected for this alternative. During
summer peak demand months, up to 12 mgd could be provided from quarry storage.
This option would require a new WTP. The possibility of pumping 13 miles from the quarry to the existing
CAWTF was considered, but the pipeline would need to be routed exclusively through developed portions of
the Towns of Cary and Apex, resulting in significant expense and construction impacts.

3 ALTERNATIVES EVALUATION
3-7
EXHIBIT 3-2
Wake Stone Corporation Triangle Quarry Location

The following factors affect the feasibility of this option:
 Uncertainty about the timing for the quarry to be available for conversion to water supply use.
 The potential for direct impacts caused by the withdrawals from Crabtree Creek, including ability to
maintain minimum flows to meet habitat and water quality requirement.
 Whether the highly urbanized Crabtree Creek watershed could be reclassified as a water supply
watershed.
 If the watershed were reclassified as a water supply watershed, the resulting burden of
development and use restrictions on not only the Town of Cary, but also the Town of Morrisville, the
Cities of Raleigh and Durham, Wake County, and Durham County.
 The presence of a Superfund site in the headwaters of Crabtree Creek.
Because of the uncertain feasibility of this option, it is an unreliable solution to meet the Towns’ 2045 water
demands.

3 ALTERNATIVES EVALUATION
3-8
3.7.2 Finished Water Capacity Purchase from a Neuse River Basin Utility
Finished water and water supply capacity could potentially be purchased from another system in the Neuse
River basin. Several utilities in the Triangle region with water withdrawals in the Neuse River basin have
constructed new water supply and WTPs in the last decade to meet anticipated growth. However, because
of the economic conditions and lingering effects of the 2007–2008 drought, their actual demands have
lagged behind projections. Several utilities appear to have sufficient treatment capacity to consider at least a
short-term sale of finished water to the Towns of Apex and Cary. It is likely that three or four
interconnections would be necessary for the Towns to access a potential cumulative finished water supply
of up to 11 mgd on an average day basis, assuming 2 to 4 mgd are available from each interconnection.
Existing mutual aid interconnections with other regional utilities are not sufficient for regular supplies of this
quantity, so in addition to the costs of capacity purchase and water treatment costs, additional water
transmission pumping and pipeline infrastructure would be required for Alternative 3c.
Without a long-term water capacity purchase agreement, this option would be an unreliable source for the
Towns’ customers. An option for the long-term would be to develop a joint-venture project to expand
existing water supplies or develop new water supply sources. Neighboring utilities are also investigating
alternatives for expanding future water supplies.
Because of the prohibitive cost of purchasing finished water capacity and constructing additional water
transmission pumping and pipeline infrastructure, concerns about potential environmental impacts from
construction activities, and the likelihood that increasing demands in the region would limit the potential for
long-term capacity purchase agreements from existing sources in the Neuse River basin, this option is not
considered feasible.
3.8 Avoid Interbasin Transfer Increase by Using Groundwater as a Source (Alternative 3d)
Under Alternative 3d, new groundwater wells would be installed to supply the Towns with the additional
water needed to meet 2045 demands and to comply with a Updated 2001 IBT Certificate (IBT does not apply
to groundwater sources). According to the Wake County Comprehensive Groundwater Investigation Final
Report (CDM, 2003), iron and manganese concentrations in Wake County groundwater are typically high,
resulting in high treatment costs. This alternative would require 45 to 65 new wells withdrawing at an
average of 100 to 150 gallons per minute, and the wells would need to be placed at ¼- to ½-mile intervals.
This “well-field” approach, with multiple wells on a single property, would be impractical because of the
requirement for at least about 5 square miles of undeveloped property. Further investigation, including test
wells, would be required to determine the technical feasibility and yield of a groundwater public water
supply. Such a well system is expected to be cost prohibitive because of the area of land that would be
required, the length of the raw water transmission line that would be needed, the operations and
maintenance (O&M) challenges associated with numerous wells, and water quality concerns due to
expected iron and manganese concentrations. Also, there is no information to indicate whether the required
yield could be sustained. New water treatment facilities for groundwater would be required; the current
water treatment facilities at the CAWTF were designed for Jordan Lake’s surface water quality. Alternative
3d is not considered feasible.

3 ALTERNATIVES EVALUATION
3-9
3.9 Avoid Interbasin Transfer Increase by Using Additional Water Resources Management Tools (Alternative 3e)
The Towns have implemented proactive water resources management tools for more than 15 years to
encourage conservation and wise water use practices. Through these efforts, the Towns have been
successful in creating an awareness among customers of the value of wise water use practices. Alternative
3e would continue and expand the Towns’ programs with the implementation of additional water resources
management tools to reduce future water demands and comply with the Updated 2001 IBT Certificate.
These management tools could include new educational programs, new policies and regulations, new
financial incentives such as rate structure modifications, new system operating practices including peak load
management, additional development planning, expanded reclaimed water use, and new water efficiency
improvements.
Because of the success of the existing water resources management strategies and tools, the Towns do not
expect that implementing additional water resources management tools alone would reliably and
predictably reduce future potable water supply demands enough to avoid an increase in IBT. Exhibit 3-3
provides an example from the Town of Cary water billing (usage) data of changes in overall (combined
residential and nonresidential) water use for Town customers between 1995 and 2013. These billing data
are only for the Town of Cary where water management strategies have been in place for years and do not
include RDU Airport and RTP South. Analysis using billing data, which does not include non-revenue water,
allows for the review of the effectiveness of the Town’s programs on influencing customer behavior. The
weather-adjusted overall gallons per capita per day (GPCD) declined approximately 20 percent during this
period. A detailed analysis of consumption indicates single-family residential customer class’ unit
consumption values have decreased the most significantly over this period (CH2M HILL and Brown and
Caldwell, 2013).
EXHIBIT 3-3
Annual Average Overall Water Use by Town of Cary Customers, 1995–2013

0
20
40
60
80
100
120
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
GP
C
D
Actual GPCD Weather Adjusted GPCD
3 ALTERNATIVES EVALUATION
3-10
The Catawba-Wateree Water Management Group Benchmarking Survey of Water Demand Management
Programs (Maddaus Water Management (Maddaus, 2009) provides a review of 28 of the longest standing
and successful water conservation programs in the country, inclusive of the Town of Cary’s program. A
comparison of GPCD values from study participants indicates that the Town's overall GPCD ranked second
lowest out of the 24 that provided data, and well below the national average of 160 GPCD (AWWA, 2001).
The Towns’ conservation and reclaimed water programs have been driving factors in the reduction in
customer demand. This declining trend in consumption took place even as greater numbers of residential
irrigation systems have been installed in the area. The increased prevalence of these systems would have
the potential to increase peak season water demands, but this has not occurred to date.
The Towns anticipate continuing existing water resources management tools and implementing new
programs in the future, as they are determined to be effective and appropriate for the communities, as
recommended in the LRWRP (CH2M HILL and Brown and Caldwell, 2013). These programs will increase the
reliability with which the Towns can meet customer demands and comply with a modified IBT certificate.
However, Alternative 3e is not considered feasible as a means to meet projected growth needs while
reducing the Towns’ long-term water demand and comply with the Updated 2001 IBT Certificate.
3.10 Selection of the Preferred Alternative
Alternative 2a (increase IBT to meet 2045 demand) appears to be the most appropriate alternative to meet
the long-range water supply needs through the year 2045 for the Towns of Apex and Cary. Alternative 2a is
the Towns’ preferred alternative. The other alternatives present significantly greater technical,
environmental, and/or economic challenges. The discussion of existing environment and direct effects
presented in the following sections focus in detail on the preferred alternative.
Exhibit 3-4 provides a summary of the alternatives and evaluation criteria. The following criteria were
considered in selecting the preferred alternative:
 Project Purpose and Need. “Yes” or “No” is assigned to indicate the ability to provide the Towns with
sufficient water supply to meet long-term demands and comply with IBT rules.
 Jordan Lake Water Supply Allocation Increase. “Yes” or “No” is assigned to indicate the need for the
Towns to increase their Jordan Lake water supply storage allocations in the Round 4 Jordan Lake
Allocation process.
 Amount of IBT. Amount of IBT for each alternative, expressed as the average day in a calendar month.
 Existing Treatment Capacity Fully Utilized. “Yes” or “No” is assigned to indicate whether
implementation of the alternative would result in maximizing the use of existing water and wastewater
treatment capacity.
 New Treatment or Conveyance Infrastructure Needed. “Yes” or “No” is assigned to indicate whether
the implementation of this alternative would require construction of new water or wastewater
treatment facilities or conveyance infrastructure.
 Anticipated Cost Relative to the Preferred Alternative (2a). “Higher” or “Lower” is assigned to indicate
the cost relative to the Preferred Alternative (Alternative 2a).
 Technical Feasibility. “Yes” or “No” is assigned to indicate whether the alternative would be technically
feasible to implement based on considerations such as land requirements, constructability, or reliability.
 Potential Environmental Impacts from Construction or Operation. The table lists potential impacts on
the environment that would be expected to occur as a result of implementation of the alternative.
3 ALTERNATIVES EVALUATION
3-11
EXHIBIT 3-4
Summary of Alternatives
Alternative
Meets
Project
Purpose
and
Need?
Increase
Allocation
from
Jordan
Lake?
Amount of IBT
Fully
Utilizes
Existing
Treatment
capacity?
Requires New
Infrastructure?
Anticipated
Cost
Relative to
the
Preferred
Alternative
(2a)
Technical
Feasibility
Potential
Environmental Impact
from Construction/
Operation a
1 – No Action No No 22 mgd; current
planned development
projects could result
in exceeding this IBT.
No No Lower Yes None Likely
2a – Increase in IBT to Meet
2045 Demands - Proposed IBT
Certificate Modification
Yes Yes 33 mgd Yes No N/A Yes None Likely
2b – Increase in IBT to Meet
2045 Demands and Use
Current Permitted Wastewater
Capacity
Yes Yes 44 mgd No Yes; new pipelines to
convey wastewater to
South Cary WRF
Higher Yes Pipeline construction
3a – Avoid IBT Increase by
Sending Additional Untreated
Wastewater Effluent to the
WWRWRF
Yes Yes 22 mgd No Yes; new pump stations
and pipelines to convey
untreated wastewater
to WWRWRF
Higher Yes Plant/pipeline
construction, increased
discharge to Cape Fear
River
3b – Avoid IBT Increase by
Discharging Additional Treated
Wastewater Effluent to the
Cape Fear River Basin
Yes Yes 22 mgd Yes Yes; new pump stations
and pipelines to convey
treated effluent to Cape
Fear Basin
Higher Yes Plant/pipeline
construction, increased
discharge to Cape Fear
River
3c -– Avoid IBT Increase by
Using a Water Source in the
Neuse River Basin
Yes No 22 mgd No Yes; new WTP or water
transmission and
pumping from Neuse
Basin utility
Higher Yes Plant/pipeline
construction, Crabtree
Creek withdrawal
3 ALTERNATIVES EVALUATION
3-12
EXHIBIT 3-4
Summary of Alternatives
Alternative
Meets
Project
Purpose
and
Need?
Increase
Allocation
from
Jordan
Lake?
Amount of IBT
Fully
Utilizes
Existing
Treatment
capacity?
Requires New
Infrastructure?
Anticipated
Cost
Relative to
the
Preferred
Alternative
(2a)
Technical
Feasibility
Potential
Environmental Impact
from Construction/
Operation a
3d – Avoid IBT Increase by
Using Groundwater as a
Source
Unknown
without
further
study
No 22 mgd No Yes; numerous new
wells, WTP,
transmission
infrastructure
Higher Yes Well/plant/pipeline
construction;
groundwater
withdrawal
3e – Avoid IBT Increase by
Using Additional Water
Resources Management Tools
No No 22 mgd; but,
unpredictable and
possibly could result
in non-compliance
with Updated 2001
IBT Certificate
No No Lower Unpredict
able
None
a SCI are considered same for all alternatives that meet the purpose and need.

3 ALTERNATIVES EVALUATION

3-13
Alternative 1 includes taking no action. This alternative would fail to meet water demands before 2045 and
would not meet the project purpose and need.
Alternative 2a (Proposed IBT Certificate Modification) would meet the project purpose and need through
use of Jordan Lake and a corresponding increase in IBT from 22 to 33 mgd to meet 2045 demands. This
alternative is considered technically feasible. IBT would increase compared with the Updated 2001 IBT
Certificate, it would be minimized by the discharge of effluent from the WWRWRF into the Cape Fear River
basin. The infrastructure to implement this alternative is in place, and the corresponding cost to implement
this alternative would be lower than other alternatives.
Alternative 2b would increase the Towns’ IBT to meet 2045 demands while fully utilizing the Towns’
permitted WRF capacity. This alternative is considered feasible and would meet the purpose and need of
providing water to meet 2045 demands. However, this alternative would not minimize IBT to the extent of
other alternatives, including Alternative 2a.
Alternative 3a would avoid an increase in IBT by transferring a portion of the Towns’ untreated wastewater
from the Neuse River Basin to be treated at the WWRWRF and then discharged to the Cape Fear River Basin.
This alternative would meet the project purpose and need, but the pumping and pipeline infrastructure
required to transfer additional wastewater to the WWRWRF for treatment and discharge would increase the
capital and O&M costs and inefficiencies of this alternative. Furthermore, this alternative would result in
underutilization of existing permitted and constructed treatment facility capacity and conveyance
infrastructure and would require earlier expansion of the WWRWRF. The additional infrastructure would
also lead to the potential for additional temporary and permanent environmental impacts. This alternative is
considered less viable than other alternatives.
Alternative 3b would avoid an increase in IBT by transferring a portion of the Towns’ treated wastewater
effluent from the South Cary WRF and/or Apex WRF (in the Neuse River basin) to a discharge location in the
Cape Fear River basin. This alternative would meet the project purpose and need, but the major effluent
pumping facilities and pipeline infrastructure required to transfer additional treated WRF effluent through
developed areas to the Cape Fear River basin for treatment and discharge would increase the capital and
O&M costs and inefficiencies of this alternative. In addition, this alternative would require additional
treatment for nutrients, especially TP, to meet the same limits imposed in the WWRWRF NPDES permit.
More stringent limits could be imposed because of nutrient impact concerns related to new discharges in
the Middle Cape Fear River basin. This additional infrastructure would also lead to the potential for
additional temporary and permanent environmental impacts. This alternative is considered less viable than
other alternatives.
Alternative 3c would avoid an increase in IBT by using a water supply source in the Neuse River basin to
offset use of Jordan Lake. The infrastructure to treat and convey water supply from the Neuse River basin
would need to be permitted and constructed, which would be a substantial additional cost compared with
other alternatives. In addition, this approach does not fully utilize existing water treatment and distribution
infrastructure. The quarry water supply is technically feasible, but the timing for the quarry to be available
for conversion to water supply use is uncertain. There are also significant costs to the Towns and other
government entities to implement development and land use restrictions to comply with a new water
supply watershed designation for the highly urbanized Crabtree Creek watershed. This alternative also has
the potential for significant direct impacts caused by the withdrawals from Crabtree Creek, including the
ability to maintain minimum flows to meet habitat and water quality requirements and potential
environmental impacts from construction activities. Although technically feasible, this alternative is
considered less economically and environmentally viable than other alternatives evaluated.
Alternative 3d would use groundwater as a water supply source and avoid an increase in the Towns’ IBT.
This alternative would meet the project purpose and need, assuming that sufficient yield is available over
this planning horizon. However, the treatment costs and the number of wells required for this alternative,
3 ALTERNATIVES EVALUATION
3-14
along with the corresponding capital and O&M costs and inefficiencies are a significant cost factor for this
alternative compared with other alternatives. Additional studies would be required to determine if this
source would be a viable option. In addition, this alternative would result in underutilization of existing
water treatment and distribution infrastructure, and new transmission infrastructure would be required to
integrate the wellfield and new treatment plant with the Towns’ existing distribution systems. This
additional infrastructure would also lead to the potential for additional temporary and permanent
environmental impacts. This alternative is considered less viable than other alternatives.
Alternative 3e would minimize or avoid an IBT increase by utilizing additional water resources management
tools. This alternative would not fully meet the project purpose and need without the implementation of
other alternatives, and there is uncertainty regarding potential future water savings. As a result, this
alternative cannot reliably or predictably eliminate the need for increased use of water from Jordan Lake or
an increased IBT. The Towns do intend to continue implementing water resources management tools as
part of their overall water supply strategy, in accordance with the recommendation in the LRWRP (CH2M
HILL and Brown and Caldwell, 2013).
The evaluations documented in Exhibit 3-4 and summarized above support selection of Alternative 2a
(Proposed IBT Certificate Modification) as the preferred alternative.

4-1
SECTION 4 Existing Environmental Conditions in the Study Area
The existing environment is described for the study area as defined in Section 1. Baseline environmental
conditions are necessary for the analysis of potential environmental effects related to the proposed increase
in IBT. The primary effects and the SCI of the proposed increase in IBT as a whole on the study area, if any,
are discussed in Section 5.
This section is organized by topic. Each basin is further described regarding the following potentially affected
areas: water resources, wetlands, topography, soils, wildlife resources, aquatic resources, land use,
agricultural land and prime farmland, forest resources, public lands and scenic and natural areas,
archaeological and historic resources, air quality, noise levels, and toxic substances and hazardous wastes.
The data were gathered through literature reviews and research, geographic information system (GIS)
queries, phone conversations, letters, and meetings with various resource agencies.
4.1 Study Area Source and Receiving Basins Defined
The Study Area (Exhibit 3-1) is divided for the purposes of this discussion and addresses two areas:
 Source Basin, which includes the portions of the Cape Fear River basin from which water is withdrawn
and returned via consumptive use (Haw River subbasin), as well as where water is returned via
wastewater discharge (Cape Fear River subbasin). The Study Area includes both the New Hope Creek
Arm and Haw River Arm of Jordan Lake, and the contributing New Hope Creek Arm watershed areas.
These watershed areas include New Hope, Third Fork, and Northeast Creeks (03-06-05) and Morgan and
Little Creeks (03-06-06). Also included in the Study Area are the river reaches immediately downstream
of the withdrawal: the Haw River reach downstream of Jordan Lake and the Cape Fear River from the
confluence of the Haw and Deep Rivers to the Town of Lillington.
 Receiving Basins, to which water is transferred from Jordan Lake via both consumptive use and
wastewater discharge. The Study Area includes significant portions of the Towns’ service areas where
consumptive use occurs, in both the Neuse River basin (Cary and Apex) and the Cape Fear River subbasin
(Apex). The Cape Fear River subbasin was not required to be included in the 2001 EIS study area, and
has been added at the request of DWR in order to address all of the Towns’ transfers out of the Haw
River subbasin. The portion of the Cape Fear River subbasin in the Town of Apex’s urban service area
includes the watershed for White Oak Creek and Harris Lake. The Neuse River basin portion of the Study
Area also includes Crabtree and Middle Creeks, to which wastewater effluent is discharged by Cary and
Apex respectively, extending from the Towns’ service area boundaries to the creeks’ confluence with the
Neuse River. The Neuse River portion of the Study Area also includes portions of Swift Creek.
Although outside the Study Area, potential flow effects in the Cape Fear River at Fayetteville, due to
upstream withdrawal from the Haw River subbasin, as well as wastewater discharge to the Cape Fear River
subbasin, are discussed in Section 5.1.1 which pertains to water resources.
4.2 Water Resources
This section includes a description of surface water, groundwater, wetlands, topography, and floodplains in
the Study Area.
4.2.1 Surface Water
Both water quantity and water quality are important factors in the function of aquatic systems. Water
quantity and its seasonal variability influences both in-stream and adjacent riparian and floodplain
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-2
ecosystems. Water quantity is a critical concern for those who depend on surface water for water supply
and wastewater discharge; the assimilative capacity of a stream is important to protect water quality.
The Clean Water Act is the basis for water quality standards and other water quality programs. The overall
goal of the Clean Water Act is for all waters to be fishable and swimmable. Water quality standards consist
of the usage classification of a water body and the numeric and narrative criteria that have been set to
protect that use. At a minimum, all waters are classified to protect aquatic life and secondary recreation.
Other classifications may be added to reflect uses such as drinking water supply and primary recreation. In
North Carolina, all water bodies used for public water supply are given a “WS” classification. Minimum
statewide water supply protection standards (certain watershed development and wastewater discharge
restrictions) apply to the water supply watershed areas.
Exhibit 4-1 shows major waterbodies, impaired streams, and water supply watersheds. Exhibit 4-1 also
shows the location of monitoring stations discussed in this section.
4.2.1.1 Source Basin
The major surface water bodies in the Haw River subbasin, within the Cape Fear River basin, include Jordan
Lake and its tributaries, including New Hope Creek and Haw River Arms (Exhibit 1-3).
JORDAN LAKE
The Jordan Lake Dam is located on the Haw River, immediately downstream of the confluence of the Haw
River and New Hope Creek. Jordan Lake was developed to provide flood control and water supply, but it
must also meet multiple objectives including low flow augmentation, fish propagation, and recreation. The
lake must be actively managed to meet these different objectives. The major tributaries to Jordan Lake are
the Haw River, Northeast Creek, New Hope Creek, and Morgan Creek (Exhibit 4-1). The reservoir is about
5 miles long on the Haw River Arm, and 18 miles long on the New Hope Creek Arm. Jordan Lake has a
shoreline of approximately 200 miles. The Jordan Lake Project, initially filled in 1981 and 1982, encompasses
46,768 acres of which approximately 13,900 acres are permanently flooded to form a reservoir at 216 feet
above mean sea level. At this elevation, Jordan Lake has a total capacity of about 215,100 acre-feet, a
maximum depth of 66 feet, and a mean depth of about 17 feet (United States Army Corps of Engineers
[USACE], 2014).
Water in Jordan Lake is considered to be in one of three storage pools: flood control storage, conservation
storage, and sediment storage (Exhibit 4-2). The conservation storage pool is further split into a water
supply pool and a low-flow augmentation, or water quality pool. To support aquatic life and other
downstream uses, flows in the Cape Fear River are augmented by releases from the Jordan Lake Dam. These
flows come from the water quality pool. Water supply withdrawals for permitted users come from the water
supply pool. When full, the water quality pool contains approximately 94,600 acre-feet of water, and the
water supply pool contains approximately 45,800 acre-feet of water (NCDENR, 2013a). This water supply
pool is estimated to yield approximately 100 mgd, of which 32 percent (yielding 32 mgd) is allocated to the
Towns of Apex and Cary (NCDENR, 2002b). However, a separate reallocation process is currently in
progress.
"T
"T
!.
!...!.
!.
!.
!.
!.!.
!.
!.!.
!.
!.!.!.!.!.
!.!.
!.
.
!.
#*
#*#*
#*
Cape Fear
River Basin
Neuse River
Basin
Haw River
Basin
Harris Lake
B. Everett
Jordan Lake
Falls Lake
Cape Fear River
Haw River
Brier Creek
Black Creek
Mo
rg
an

Cr
e
e
k
L
ittl
e C
r
e
e
k
Booker Creek
Bolin Creek
Williams Creek
Walnut Creek
T hird F o r k C reek
Morgan Creek
(University Lake)
Gulf CreekLick CreekCrabtree
Creek
Swift Creek
W h i t e O a k C r e e k
Northeast Creek
Crabtree Creek
Middle Creek
Swift Creek
Buckhorn
Creek
New
Hope Creek
WAKE COUNTY
JOHNSTON COUNTY
CHATHAM
COUNTY
HARNETT COUNTY
FRANKLIN COUNTYORANGE COUNTY
LEE COUNTY
DURHAM COUNTY
JF34
JF23 JF24
BF57
JB69
JB66
JB68
JB79JB53 JB52
JB35
JB37JB36
BB85
BB89
JB330
JB295
JB278
JB277
BB437
BB146
BB102
BB104
BB103
BB238
BB324
B6160000
B6370000
BB53
BB90
EXHIBIT 4-1Surface Water
Interbasin Transfer (IBT) Environmental Assessment
Legend
Streams
Impaired Waterbody
River Basin Boundary
Study Area Boundary
County Border
Water Supply Watersheds
Major Waterbodies
Monitoring Stations
Type, Rating
"T Ambient
#*Fish, Excellent
#*Fish, Good-Fair
#*Fish, Poor
!.Benthos, Good
!.Benthos, Good-Fair
!.Benthos, Fair
!.Benthos, Poor
.Benthos, Not Rated
$
01020Miles
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-4

This page has been intentionally left blank.
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA

4-5
EXHIBIT 4-2
Jordan Lake’s Storage Volume

SOURCE: NCDENR, 2013A
Under normal conditions, the dam is operated to maintain a target flow of 600 cubic feet per second (cfs)
which is allowed to vary plus or minus 50 cfs because of the flow variability and lack of precision in
managing releases to meet the downstream flow target (USACE, 1992). Exhibit 4-3 presents the lake levels
since the filling of Jordan Lake started in 1981. Because of active management of the lake, the surface level
has remained relatively stable over time. Exhibit 4-3 shows that even during the 2002 and 2007 droughts
the lake level was effectively maintained, and it recovered to meet the different objectives of the resource.

Dam
Elevation 240
Top of flood
control pool
Elevation 216
Top of conservation pool
Elevation 202
Bottom of
conservation pool 74,700
acre-feet
acre-ft
Low Flow
Augmentation
94,600 acre-feet
538,400 acre-feet
Water Supply
45,800 acre-feet
Surface Area
31,800 acres
Sediment Storage
Conservation
Storage
Flood Control
Storage
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-6
EXHIBIT 4-3
Historical Lake Levels – Jordan Lake

SOURCE: USACE, 2014A
Jordan Lake has been eutrophic since it was filled in 1982. In 1983, the lake was classified as a combination
of Class B and Class A-II (for public water supply after treatment and later changed to Class WS-IV, reflecting
changes to the water supply classification system). The Jordan Lake watershed was classified as Nutrient
Sensitive Waters (NSW) and the DWR (formerly the Division of Water Quality [DWQ]) implemented a
watershed nutrient management strategy to control primarily phosphorus inputs from point sources and a
voluntary program to control nitrogen and phosphorus from nonpoint sources. The original NSW
supplemental classification required that a nutrient management strategy be implemented to protect the
reservoir from water quality problems associated with nutrient enrichment. Total phosphorus (TP) limits of
2 milligrams per liter (mg/L) were required for NPDES permitted facilities with flows greater than 0.005 mgd.
In 2000, all subject dischargers were meeting this limit. In addition, discharges located upstream from the
Upper New Hope Arm of Jordan Reservoir received TP limits of 0.5 mg/L during from April through October.
In 1997, the General Assembly adopted GS 143-215.1(c1) to (c6), which generally required dischargers to
any waters classified as NSW to meet annual mass-based effluent requirements for total nitrogen (TN) based
on a concentration of 5.5 mg/L and for TP based on a concentration of 2 mg/L. The statute also allowed
these limits to be varied based on the results of a calibrated nutrient response model (CNRM), and many
dischargers in the Jordan Lake watershed jointly undertook the effort to hire a consultant to develop a
CNRM. In 2000, DWQ continued the modeling efforts of the stakeholder group. Eventually, the Upper New
Hope Arm of Jordan Lake was placed on the 2002 State 303(d) list of Impaired Waters, based on results of
CNRM and additional water quality sampling. The 303(d) listing of the Upper New Hope Arm of the lake
resulted in the need for a total maximum daily load (TMDL) for this portion of the lake. The Jordan Lake
Nutrient management strategy was developed to meet these requirements. Since the 2002 listing for the
Upper New Hope Arm, water quality in the Lower New Hope and Haw River Arms also indicated they are
200.00
205.00
210.00
215.00
220.00
225.00
230.00
235.00
240.00
19
8
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Su
r
f
a
c
e

L
e
v
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l

(
f
e
e
t
)
Date
2002 Drought:
6-1-2001 to 12-31-2002
2007 Drought:
1-1-2007 to 12-31-2008
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-7
Impaired, based on chlorophyll a levels, and are currently listed as Impaired as well (NCDENR, 2005). 303(d)
listed waters are further discussed in Section 4.2.1.1.2.
A baseline study, conducted from January 2005 through September 2008 revealed that in addition to the
elevated nutrient and chlorophyll a levels throughout Jordan Lake, 18 percent of the total observations in
the Haw River Arm exceeded the state water quality standard of 40 micrograms per liter. Other water
quality concerns in the Haw River Arm include high pH and high total percent dissolved oxygen saturation
values, which are most likely linked to algal production. In the Upper New Hope Arm above State Road (SR)
1008, 83 percent of the chlorophyll a values exceeded the DWQ water quality standard. In addition, this arm
of the lake had high turbidity values and low Secchi depth readings, indicating poor water clarity due to algal
productivity and/or sedimentation. The Lower New Hope Creek Arm (downstream from SR 1008) was also
found to be Impaired for chlorophyll a (23 percent of the total observations) and turbidity (26 percent of the
total observations) (NCDENR, 2009a).
The Jordan Rules (as defined in 15 NCAC 02B .0262 - .0311) were developed for the purpose of
implementing the TMDL and Jordan Lake nutrient management strategy. To meet the requirements of the
TMDL, the Jordan Rules splits the reservoir and its drainage into three discrete areas: Haw River Arm, Upper
New Hope Arm, and Lower New Hope Arm. There are specific nutrient reduction targets for each of these
arms. These are expressed as loading targets as well as percent reductions compared to the estimated
annual average load from 1997 through 2001. The following is a summary of the nutrient reduction targets:
 Upper New Hope Arm
 TN – 35 percent reduction from the 1997 to 2001 baseline load of 986,186 pounds per year
allocated approximately 52 percent to point sources and 48 percent to nonpoint sources
 TP – 5 percent reduction from the 1997 to 2001 baseline load of 87,245 pounds per year allocated
approximately 28 percent to point sources and 72 percent to nonpoint sources
 Lower New Hope Arm
 TN – 0 percent reduction from the 1997 to 2001 baseline load of 221,929 pounds per year allocated
approximately 3 percent to point sources and 97 percent to nonpoint sources
 TP – 0 percent reduction from the 1997 to 2001 baseline load of 26,574 pounds per year allocated
to less than 1 percent to point sources and greater than 99 percent to nonpoint sources
 Haw River Arm
 TN – 8 percent reduction from the 1997 to 2001 baseline load of 2,790,217 pounds per year
allocated approximately 35 percent to point sources and 65 percent to nonpoint sources
 TP – 5 percent reduction from the 1997 to 2001 baseline load of 378,569 pounds per year allocated
approximately 29 percent to point sources and 71 percent to nonpoint sources
The adopted Jordan Rules were comprehensive and included the following components:
 Stormwater Rules – New Development
 Stormwater Rules – Existing Development
 Riparian Buffer Rules
 Wastewater Discharge Rule
 Agricultural Rule
 Fertilizer Management Rule
 Options for Offsetting Nutrient Loads
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-8
The Jordan Rules became effective in 2009, but each of the separate rules had different implementation
dates. For example, the original New Development Rule required local governments to implement their
programs in 2012, while the original Wastewater Discharge Rule required WWTP to meet nitrogen
requirements by 2014. Multiple session laws between 2009 and 2012 delayed the implementation dates of
specific rules, and Session Law 2013-360 delayed all implementation dates that hadn’t yet occurred by three
years. Since the Riparian Buffer Rules, the State and Federal New Development requirements, and the
WWTP discharge phosphorus requirements were already being implemented, they continue to be
implemented. Local governments have until 2017 to implement their new development programs and they
will not be required to implement existing development requirements until 2018 in the Upper New Hope
Arm and 2021 in the Haw and Lower New Hope Arm. Implementation of the development rules is required
only if monitoring shows that water quality standards are still not being met. WWTPs have until 2019 or
2021 to meet nitrogen requirements. It should be noted that the preceding information provides an
overview of the implementation dates for the Jordan Rules, but is not inclusive of all specific details or
schedules. Waters associated with Jordan Lake have been classified as Water Supply IV – Highly Developed
(WS-IV); Nutrient Sensitive Waters (NSW), Critical Area (CA), and in some portions, Primary Recreation,
Fresh Water (B) (NCDENR, 2013b). Jordan Lake serves as a current or planned future water supply for
Chatham County, the City of Durham, the Towns of Apex, Cary, Hillsborough, Holly Springs, Morrisville and
Pittsboro, OWASA, Orange County, and RTP South.
TRIBUTARIES TO JORDAN LAKE
303(d) Listed Waters
Section 303(d) of the Clean Water Act requires that states develop a list of waters that do not meet water
quality standards or which have impaired uses. The State must prioritize these waterbodies and prepare a
management strategy or TMDL. Jordan Lake’s major tributaries (the Haw River, New Hope Creek, Northeast
Creek, and Morgan Creek) are included in the State 303(d) list for impairments related to eutrophication
such as pH, low dissolved oxygen, and chlorophyll a. In addition, other small streams and tributaries in the
Source Basin Study Area are listed: Bolin Creek, Booker Creek, Buckhorn Creek, Gulf Creek, Lick Creek, Little
Creek, and Third Fork. Most of these streams have been reported to be Impaired for ecological/biological
integrity mainly due to urban runoff and land development; DWR has assigned a medium priority to most of
these streams (NCDENR, 2014a).
Haw River
The Haw River at Bynum has a drainage area of 1,275 square miles (mi2). Historical annual flows measured
at United States Geological Survey’s (USGS) Bynum gage (02096960) are presented in Exhibits 4-4 and 4-5.
Exhibit 4-4 presents a box and whisker chart highlighting the median and average flows. The natural cycle in
annual flows can be observed with the median annual flow values. Exhibit 4-5 presents the minimum,
average, and maximum annual flows.

4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-9
EXHIBIT 4-4
Haw River Flow, USGS Gaging Station – Bynum, North Carolina

EXHIBIT 4-5 Haw River Annual Flow, USGS Gaging Station – Bynum, North Carolina

0
500
1,000
1,500
2,000
2,500
3,000
19
7
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5
19
7
6
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1
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Fl
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(
c
f
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)
Date
Bynum Gage (02096960)
0
1
10
100
1,000
10,000
100,000
19
7
4
19
7
5
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7
6
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7
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(
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Date
Bynum Gage (02096960)
MinOfflow
AvgOfflow
MaxOfflow
Median Flow
Average Flow
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-10
Macroinvertebrate and fish communities are sampled by NCDENR to assess water quality and habitat
conditions. U.S. 64 is the last monitoring site on the Haw River before it enters Jordan Lake and is composed
of multiple channels. The benthic station BB443, at U.S. 64 on the Haw River, improved to a bioclassifcation
score of Excellent in 2008 for the first time since sampling on the Haw River began in 1983. This
improvement is likely due, in part, to the highest Ephemeroptera, Plecoptera, and Trichoptera (EPT) richness
ever recorded at this site. This station was not sampled in 2003 because of high summer flows and received
a score of Good in 2002 (NCDENR, 2012a).
Northeast Creek
Northeast Creek from U.S. 55 to the Triangle WWTP (3.3 miles) is Impaired for aquatic life because of
violations of standards for turbidity and dissolved oxygen. This segment is Supporting for recreation
(NCDENR, 2009b). On this segment a benthic station at SR 1102 was sampled but not rated in 1998
(NCDENR, 2012a).
Northeast Creek from Triangle WWTP to Kit Creek (3.3 miles) is Impaired for aquatic life because of
violations of standards for turbidity. This segment is also Impaired for recreation because of violations of
standards for fecal coliform bacteria (NCDENR, 2009b). On this segment, at SR 1100, a benthic station and
fish station were sampled in 1998 but were not rated (NCDENR, 2012a).
Northeast Creek from Kit Creek to downstream of Panther Creek (3.2 miles) is Impaired for aquatic life
because of violations of standards for turbidity. This segment is Supporting for recreation (NCDENR, 2009b).
On this segment, a benthic sampling site at SR 1731 received a rating of Fair in 1993 (NCDENR, 2012a).
DWQ developed a fecal coliform bacteria TMDL for Northeast Creek that was approved by EPA in September
2003. The TMDL recommended a 90 percent reduction in bacteria loading from urban stormwater in the
City of Durham (NCDENR, 2005).
New Hope Creek
On New Hope Creek, benthic sampling site BB238, located at SR 1107, is below the City of Durham's South
WRF. This site has consistently rated Fair, including as recently as 2008. Based on Biotic Index (BI) values,
water quality has not changed at this site (NCDENR, 2009b).
New Hope Creek from source to Sandy Creek (17.4 miles) is Supporting for aquatic life (NCDENR, 2009b).
Benthic sampling site BB324, near SR 1730 was rated Good-Fair in 2003 (NCDENR, 2012a).
New Hope Creek from Sandy Creek to SR 2220 (1.1 miles) is Supporting for aquatic life (NCDENR, 2009b). A
benthic sampling site at SR 1734 received a rating of Good in 1993. Also on this segment, fish sampling site
BF57, at SR 2220, was rated Good-Fair in 2003 and had no intolerant species, indicating degraded water
quality (NCDENR, 2012a).
New Hope Creek from SR 2220 to I-40 (3.5 miles) is Impaired for aquatic life due to violations of standards
for dissolved oxygen and turbidity. This segment is Not Rated for recreation (NCDENR, 2009b). A benthic
sampling site at SR 2220 received a rating of Fair in 1987 (NCDENR, 2012a).
New Hope Creek from I-40 to SR 1107 (4 miles) is Impaired for aquatic life (NCDENR, 2009b). A benthic
sampling site at I-40 received a rating of Fair in 1985 (NCDENR, 2012a).
DWQ completed a fecal coliform study in New Hope Creek in 2000 and determined that fecal coliform
bacteria did not exceed the standard in this segment. This segment is Supporting for recreation because of
this sampling. There are many single-family NPDES permitted discharges in this watershed that may
contribute oxygen-consuming wastes as well as bacteria and nutrients (NCDENR, 2005).
Morgan Creek
A sample was collected at benthic site BB146 near NC 54 during the 2008 drought. It should not have been
rated because it was collected during the drought, but it was assigned a Fair bioclassification. A year later, in
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-11
2009, the bioclassification increased from Fair to Good. The biological community was very similar to the
2003 sample and appears to have recovered from the drought. When corrected for the season, the EPT
richness (23) and the BI (4.36) recorded from the 2009 collection were similar to those recorded in
November 2003 (EPT = 22 and EPT BI = 4.22) (NCDENR, 2009b). A fish sampling station also near NC 54
received a rating of Good in 1994.
Further downstream, benthic sampling site BB53, below the OWASA WWTP received ratings of Fair in 1998
and 2003. A benthic sampling site upstream of the OWASA WWTP and a fish sampling site off SR 1900, were
also rated Fair in 1994 and 1988 respectively. Even farther downstream, benthic sampling sites at Botanical
Trail and SR 1726 received ratings of Good Fair and Fair, respectively in 1998.
HAW RIVER AND CAPE FEAR RIVER
The confluence of the Haw River and the Deep River, downstream of the Jordan Lake Dam, forms the Cape
Fear River in Subbasin 03-06-07. Subbasin 03-06-07 consists mainly of the Cape Fear River and several small
tributaries. The Cape Fear River at Lillington has a drainage area of 3,464 mi2. Historical annual flows
measured at Lillington gage (02102500) are presented in Exhibits 4-6 and 4-7. Exhibit 4-6 presents a box and
whisker chart highlighting the median and average flows, the natural cycles in flow can be observed. Exhibit
4-7 presents the minimum, average, and maximum annual flows.

EXHIBIT 4-6
Cape Fear River Flow, USGS Gaging Station – Lillington, North Carolina

0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
19
2
4
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6
19
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8
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6
20
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Fl
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(
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)
Date
Lillington Gage (02102500)

4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-12
EXHIBIT 4-7
Cape Fear River Annual Flow, USGS Gaging Station – Lillington, North Carolina

Ambient stations on the Cape Fear River include Cape Fear River at NC 42 near Corinth (B6160000) and Cape
Fear at US 401 near Lillington (B6370000) (Exhibit 4-1). The data from these stations have identified
exceedances of the state criteria for pH, turbidity, and fecal coliform (NCDENR, 2008).
The Cape Fear River was Fully Supporting in the NCDENR 2000 Cape Fear River Water Quality Plan (NCDENR,
2000); however, the Cape Fear River from confluence of the Haw and Deep Rivers to NC 42 (3.7 miles) is
now considered Impaired for aquatic life because of exceedance of the standard for chlorophyll a. Algal
blooms have been common in this segment of the river upstream of Buckhorn Dam; pH levels were
commonly elevated as well, likely as a result of the algal activity. Discharges in the Haw and Deep Rivers and
nutrient laden runoff from upstream urban and agricultural land uses are contributing nutrients into this
slow-moving segment. Algal activity was especially high during the summer of 2002, when flow was
extremely low because of drought conditions. The Cape Fear River from downstream of Daniels Creek to the
Upper Little River (19 miles) is Supporting for aquatic life (NCDENR, 2014a). Benthic sampling site BB437,
near U.S. 401, received a rating of Good–Fair in 2003 (NCDENR, 2012a). Turbidity was above the water
quality standard, likely due to runoff from upstream land uses in the Haw River and Deep River watersheds
(NCDENR, 2005).
Approximately one-third of the segment of the Cape Fear in the Source Basin Study Area (from the dam to
Lillington) is classified as WS-IV.
4.2.1.2 Receiving Basins
NEUSE RIVER SUBBASIN
The major surface water bodies in the Neuse River Subbasin, within the Neuse River Basin, include Crabtree
Creek, the headwaters of Swift Creek, and Middle Creek.
1
10
100
1,000
10,000
100,000
1,000,000
19
2
4
19
2
6
19
2
8
19
3
0
19
3
2
19
3
4
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3
6
19
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19
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9
0
19
9
2
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9
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8
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0
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20
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An
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(
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Date
Lillington Gage (02102500)
MinOfflow
AvgOfflow
MaxOfflow
Jordan Lake
operation
started in
1981
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-13
The entire Neuse River Basin was classified as NSW in 1988, and the DWR implemented a basinwide nutrient
management strategy to control nitrogen and phosphorus inputs from point and non-point sources.
Crabtree Creek
Crabtree Creek, Lake Crabtree, Brier Creek, Little Brier Creek, and Walnut Creek have been included in the
State 303(d) list because of a fish consumption advisory related to polychlorinated biphenyls (PCBs)
contamination from a Superfund site (NCDENR, 2014a).
Additional impairments in the basin include in Black Creek, Crabtree Creek, Hare Snipe Creek, Marsh Creek,
Mine Creek, and Richlands Creek because of ecological evaluations; Lake Crabtree because of turbidity; the
Neuse River because of copper and turbidity; and Pigeon House Creek because of zinc standards violations
(NCDENR, 2014a).
The upper reach of the Crabtree Creek (upstream of Lake Crabtree Dam) and its tributaries drain urban
areas in the Towns of Cary and Morrisville. The Study Area also contains the lower section of Crabtree Creek
and its floodplain, downstream of the North Cary WRF. The stream flows for several miles through the
William B. Umstead State Park and through the City of Raleigh before its confluence with the Neuse River.
Crabtree Creek, at the point of discharge of the North Cary WRF immediately downstream of the Lake
Crabtree Dam, has a drainage area of 52 mi2.
The USGS maintains a gage at Ebenezer Church Road, downstream of the park, and a gage at U.S. 1 (Capital
Boulevard), in the lower segment of the creek before its confluence with the Neuse River. The drainage area
at Ebenezer Church Road is 76 mi2. The drainage area at U.S. 1 is 121 mi2.
DWR ambient monitoring stations for the surface waters in the Study Area are shown in Exhibit 4-1. The
ambient monitoring data collected in Crabtree Creek have revealed exceedances of the state criteria for
dissolved oxygen and turbidity (NCDENR, 2012b).
Because of the lower than average flows during the 2010 basin cycle, the segment of Crabtree Creek within
Umstead State Park was the only segment on Crabtree Creek that had sufficient flow to sample the benthic
community. Sufficient flow at this location was most likely due to the wastewater effluent discharged from
the North Cary WRF located approximately 1 mile upstream. In 2005, this site, JB35, received a Fair
bioclassification, down from the Good-Fair bioclassification it had received in the previous two basin cycles
(1995 and 2000). In 2010 it again received a Good-Fair bioclassification (NCDENR, 2012a).
Upstream and downstream of Umstead Park, 2005 benthic sampling ratings of Poor and Fair occurred at
benthic stations JB36 at NC 54 and JB37 at U.S. 1, respectively. On Crabtree Creek, four benthic sites
sampled before 2000 were rated Fair and one was rated Poor. Fish sampling stations JF23 and JF24, near
and immediately downstream of Umstead, received ratings of Excellent in 2004 and 2010, respectively.
Lake Crabtree and the segment of Crabtree Creek through the park are classified as B-NSW waters. The
remainder of the stream is classified as C-NSW. Point sources are allowed in B-NSW and C-NSW waters.
Swift Creek
Swift Creek and its tributary, Williams Creek, are Impaired and were included in the 2012 State 303(d) list.
The impairment to ecological and biological Integrity is attributed to agriculture and urban runoff,
construction, and land development (NCDENR, 2012a). A land management plan and TMDL have been
developed for Swift Creek and its headwaters. These creeks are included in the draft 2014 Integrated
Report as impaired with an approved TMDL for assessment parameter(NCDENR, 2014a).
A small portion of the headwaters of Swift Creek (upstream of Lake Wheeler) is contained in the Study Area.
This portion of the Swift Creek watershed is within or close to the service area of the Apex, North Cary, and
South Cary WRFs that receive a portion of the water being transferred. There is a USGS gage (02087580) at
the downstream edge of the Study Area. The drainage area is 21 mi2.
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-14
The ambient monitoring data collected in Swift Creek have revealed exceedances of the state criteria for
dissolved oxygen (NCDENR, 2012b). Benthic sampling site JB52 on Swift Creek at SR 1152 has frequent
fluctuations in discharge as a result of a high percentage of impervious surface areas upstream. The drainage
area is 18.9 mi2 and includes large portions of the Town of Cary. Including the 2009 sample, this site has
been sampled seven times; each sample led to a Fair bioclassification. The consistently low EPT richness and
elevated BI and EPT BI strongly suggest persistent and unfavorable physico-chemical conditions at this
location. A fish community sampling site, JF91, is also located on SR 1152 on Swift Creek. This site was
rated Fair and Good–Fair during two sampling events in 2000 and was rated Good–Fair when sampled in
2010 (NCDENR, 2012a).
Four additional benthic sampling sites on Crabtree Creek within the Receiving Basins Study Area have been
sampled since 2000. Three of those sites were rated Fair and one was rated Poor. Farther downstream of
the Study Area, a benthic site at SR 1435 was sampled in 2009 and rated Fair.
This portion of Swift Creek has been classified as Water Supply III – Moderately Developed (WS-III) and NSW.
Point source discharges are allowed in WS-III-NSW waters.
Benthic sampling sites on Williams Creek at SR 1308 and U.S. 64 received ratings of Fair and Poor in 2010
and 2009, respectively.
Middle Creek
Middle Creek and an unnamed tributary to Middle Creek are on the 2012 State 303(d) list (NCDENR, 2014a).
A small portion of the headwaters of Middle Creek is also within the Receiving Basins Study Area. This
portion of the Middle Creek watershed is within or close to the service area of the Apex WRF that receives a
portion of the water being transferred. In addition, an unnamed tributary (UT) to Middle Creek and the
mainstem of Middle Creek receive the effluent of the Apex WRF and the South Cary WRF, respectively.
Therefore, the Study Area includes the UT to Middle Creek and its floodplains, downstream of the Apex WRF
discharge, as well as Middle Creek and its floodplains to its confluence with the Neuse River.
USGS maintains a continuous flow recording gauge on Middle Creek at NC 50 (02088000), 2.6 miles
downstream of the Cary South WRF. The drainage area at NC 50 is 83.5 mi2.
This segment of Middle Creek is located northeast of Fuquay Varina. Benthic sampling station JB68, at
SR 1375, was first sampled in 1986 and received a bioclassfication of Fair because of the high EPT BI (6.67).
Since that time the EPT BI (5.86 in 2010) has remained consistently lower. In 2010, the EPT BI (16) was
higher than any previous basinwide sample, suggesting a slight water quality improvement. Conductivity has
remained elevated between 220 and 300 microSiemens per centimeter since 2000, suggesting some
pollution inputs from upstream. This segment is located 3 miles south of the South Cary WRF (NC0065102)
(NCDENR, 2012a). Fish sampling site JF34 is also at SR 1375 and was rated Excellent in 2004.
Farther upstream on Middle Creek, benthic sampling sites JB330 and JB295 were rated Fair in 2010 and
2005, respectively. Farther downstream, benthic sampling site JB66 was sampled but not rated in 2002 and
JB69 was rated Good–Fair when sampled in 2005. On Middle Creek, ratings for seven benthic sites sampled
before 2000 ranged from Fair to Good and Not Rated (NCDENR, 2012a).
Most of Middle Creek is classified as “C” (Aquatic Life, Secondary Recreation, Fresh Water), and NSW. Point
sources are allowed in C-NSW waters.
CAPE FEAR RIVER SUBBASIN
The major surface water bodies in the Cape Fear River subbasin, within the Cape Fear River basin, include
Harris Lake and its tributaries, and White Oak Creek.

4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
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Harris Lake and its Tributaries
Harris Lake and its tributaries are not included in the State 303(d) list. Buckhorn Creek, downstream of
Harris Lake, is on the 303(d) list, as discussed later in this section.
The watershed containing Harris Lake and its tributaries is approximately 80 mi2 and extends south from the
Town of Apex to the Cape Fear River and east from the Chatham/Wake County line to the Town of Holly
Springs (Exhibit 4-1). The watershed contains Harris Lake, which is an impoundment of Buckhorn Creek used
by Duke Energy’s 900-megawatt Shearon Harris Nuclear Plant for cooling water. The watershed also
contains six named tributaries to Harris Lake: White Oak Creek, Little White Oak Creek, Utley Creek, Cary
Branch, Thomas Creek, and Tom Jack Creek. Duke Energy is a major landowner within the watershed. Major
point source dischargers in the watershed are the Town of Holly Springs (discharge to Utley Creek) and
Shearon Harris Nuclear Plant.
Modeling results indicate that nutrient and sediment loadings vary greatly throughout the Study Area. Harris
Lake has a strong water quality effect, because it traps significant amounts of sediment and phosphorus.
Agricultural activities and channel erosion from developed areas result in some catchments with very high
sediment and nutrient sources (Buck Engineering, 2003).
Earlier studies indicated the Holly Springs WWTP was a significant contributor of nutrients to Utley Creek.
Because of these water quality problems, the 2000 Cape Fear River Basinwide Water Quality Plan
recommended that the Town of Holly Springs consider other alternatives to the discharge to Utley Creek
(NCDENR, 2000). It also recommended that land use planning be used to prevent further increases in
nutrient loading from the developing watershed. The Town of Holly Springs has worked with DWR to
identify cost effective discharge alternatives that also protect water quality. In 2012, the State granted the
Town of Holly Springs a permit for an expansion of the WWTP. The permit specifies a discharge to a new
location on Utley Creek near its confluence with Harris Lake and requires stringent limits on nutrient levels
(NCDENR, 2012c).
Waters associated with the tributaries of Harris Lake, listed above, have been classified as “C”, Aquatic Life,
Secondary Recreation, Fresh Water (NCDENR, 2013b).
4.2.2 Groundwater
Because groundwater information is available for larger areas, the discussions for the existing environment
for the Source Basin Study Area and Receiving Basins Study Area are combined.
The western portion of the Study Area is within the Triassic Basin of the Piedmont region of North Carolina
and is characterized by a thin regolith layer, which limits groundwater storage capacity. Because of the
properties of Triassic soils, infiltration is low. Septic systems may not percolate well and could become a
public health hazard if not properly designed, installed, and maintained. The southeastern portion of the
Study Area, including the Cape Fear River downstream of Jordan Lake, is within the Coastal Plain basement
and metaigneous felsic hydrogeologic unit. The Coastal Plain Basement comprises undifferentiated
crystalline basement rocks of igneous and metamorphic origin overlain by sedimentary sands, gravels, clays,
and marine deposits. Hydraulic conductivity is higher in the eastern portion of the Study Area because of the
greater prevalence of gneiss rock compared to the sedimentary rock in the Triassic Basin. The metaigneous,
felsic hydrogeologic Unit is light-colored, massive to foliated metamorphosed bodies of varying assemblages
of felsic intrusive rock types. Local shearing and jointing are common. Well yields in areas with felsic geology
are average for the Piedmont whereas those in the Triassic are low. In general, well yields in the western
part of the Study Area tend to be low (approximately 5 to 25 gallons per minute) with yields in the southeast
being moderately higher. Some citizens within the Study Area currently obtain their water from wells and
discharge waste into septic systems. These citizens could request connections if municipal water and sewer
services are available to them.
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-16
There is one drought indicator well, “Chi Psi Fraternity, UNC,” or OR-069, within the Study Area. The well is
located in the Source Basin Study Area, within Orange County on the University of North Carolina’s campus.
The well has been on record for 65 years and the water level has decreased an average of 0.02 foot per year
over that time (NCDENR, 2014b).
4.2.3 Wetlands
According to the United States Environmental Protection Agency (USEPA), wetlands are lands of transition
between terrestrial and aquatic systems where the water table is usually at or near the surface or the land is
covered by shallow water at least part of the year (Title 40 Code of Federal Regulations Part 230.3(t)). For
regulatory purposes under the Clean Water Act, the term wetlands means “those areas that are inundated
or saturated by surface or ground water at a frequency and duration sufficient to support, and that under
normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil
conditions.” In general, wetlands share three key characteristics: wetland hydrology, hydric soils, and
hydrophytic plants. Wetlands and vegetated riparian areas are valuable because they are biologically
productive natural ecosystems, provide wildlife habitat, protect water quality, control erosion, and prevent
flooding damage.
The type and area of wetlands within the Study Area were determined using the United States Fish and
Wildlife Service (USFWS) National Wetland Inventory (NWI) maps in GIS format (USFWS, 2013). Although
the NWI does not map all wetlands, it is useful in terms of classifying types of wetlands and their
approximate locations within the Study Area.
Area streams tend to have relatively narrow floodplains, although broader floodplains are associated with
several significant local streams in the Study Area. Within these floodplains, riverine wetlands function as
storage areas for floodwaters, slowing runoff and thereby lessening flood levels downstream. These
wetlands also serve as areas of deposition for sediment and other material carried by floodwaters. Riverine
wetlands are common throughout the area.
Analysis of the soils mapping within the Study Area indicate the presence of hydric soils, a wetland indicator.
These soils are located primarily along stream channels, concurring with NWI data indicating that wetlands
within the Study Area are primarily located within riparian and floodplain areas. Small areas of emergent
wetlands are present along ponds. Open water ponds have been created along many of the streams within
the Study Area (United States Department of Agriculture [USDA], 2014).
4.2.3.1 Source Basin
The inventory of NWI wetlands in the Source Basin Study Area identifies 35,096 acres of wetlands
(approximately 14 percent of the Source Basin Study Area). These wetlands are shown in Exhibit 4-8. The
majority of wetland area in the Source Basin Study Area (51 percent) is open water lake area, primarily
Jordan Lake. The largest vegetated wetland type within the Source Basin Study Area is riparian or
bottomland forested/shrub wetlands associated with streams and their floodplains (42 percent).
4.2.3.2 Receiving Basins
The inventory of NWI wetlands in the Receiving Basins Study Area identifies 9,464 acres of wetlands
(approximately 10 percent of the Receiving Basins Study Area). These wetlands are shown in Exhibit 4-8.
The primary wetland types within the Receiving Basins Study Area are riparian or bottomland forest
associated with streams and their floodplains. The major type of NWI wetlands is forested and is part of
bottomland communities adjacent to larger streams within the Study Area.
Cape Fear
River Basin
Neuse River
Basin
Haw River
Basin
Harris Lake
B. Everett
Jordan Lake
Falls Lake
Cape Fear River
Haw River
Northeast Creek
Crabtree Creek
Middle Creek
Swift Creek
Buckhorn
Creek
Black Creek
New
Hope

Creek WAKE COUNTY
JOHNSTON COUNTY
CHATHAM
COUNTY
HARNETT COUNTY
FRANKLIN COUNTYORANGE COUNTY
LEE COUNTY
DURHAM COUNTY
EXHIBIT 4-8Wetlands
Interbasin Transfer (IBT) Environmental Assessment
Legend
Major Waterways
River Basin Boundary
County Border
Study Area Boundary
NWI Wetland Type
Lake
Freshwater Pond
Riverine
Freshwater Emergent Wetland
Freshwater Forested/Shrub Wetland
Other
$
01020Miles
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
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4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
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4.2.4 Topography
The Study Area is primarily located in the North Carolina Piedmont, with gently sloping to moderately steep
terrain. The terrain supported the formation of Jordan and Harris Lakes. The Cape Fear River within the
Study Area transitions to the Coastal Plain before it reaches the USGS gage at Lillington. The topography
transitions in this area, at the fall line, from sloping terrain and rolling hills to more of a flat topography.
Important topographical features in the Study Area include floodplains. Floodplains are low, relatively flat
areas adjacent to streams and function as storage areas for surface water during large rainfall events. Within
floodplains, micro topographical variations often create pockets of riverine wetlands, such as those within
the Study Area. These riparian floodplain areas provide multiple functions, including flood water storage,
sediment depositional areas, wildlife habitat, corridors for wildlife movement, and water quality functions
such as infiltration zones and surface water filtering.
Flood Insurance Rate Maps (FIRMs) for the area indicate approximately 98.5 mi2 of open water and Federal
Emergency Management Agency (FEMA)-regulated floodplains inside the Study Area. The majority of the
open water and floodplain area occurs in the Source Basin Study Area, with Jordan Lake comprising 21.7 mi2
of the 75.7 mi2. Approximately 22.8 mi2 of floodplain and open water occur in the Receiving Basins Study
Area (FEMA, 2013). Floodplains within watersheds greater than one square mile are regulated by FEMA.
FIRMs for the area are dated May 2, 2006 (FEMA, 2006). FIRMs for the Neuse River basin and Cape Fear River
basin in Wake County are being updated and are expected to be available for public review in 2014. This will
include new limited detailed floodplain studies and future flood conditions in some areas of the Cape Fear
River basin, which will likely increase the floodplain information available to the Towns. The floodplains may
change in the future based on the revisions reflected in the updated FIRMs.
4.3 Soils
According to the Wake County Soil Survey (USDA, 1970), “a soil association is a landscape that has a
distinctive proportional pattern of soils. It normally consists of one or more major soils and at least one
minor soil, and it is named for the major soils.” Most of the soil types within the Study Area can be
summarized by their broader soil association categories.
4.3.1 Source Basin
The major soil types in the Source Basin Study Area are Appling, Creedmoor, Georgeville, Nanford, Tarrus,
and Wedowee. These soils are mostly silt loams. Soil types within floodplains and adjacent to streams
include Wehadkee and Chewacla. Other soil types present in smaller areas include Georgeville, Nanford, and
Tarrus. Many of these soils have been impacted by the formation of Jordan Lake; development, especially in
the eastern portion of the Source Basin Study Area; and other soil disturbances.
4.3.2 Receiving Basins
The major soil types in the Receiving Basins Study Area are Appling, Cecil, Creedmoor, and White Store.
These soils are mostly sandy loams. Soil types within floodplains and adjacent to streams include Wehadkee
and Chewacla. Other soil types present in smaller areas include Appling, Mayodan, and White Store. Many
of these soils have been impacted by development and other soil disturbances.
4.4 Wildlife Resources
Within the Study Area, natural vegetation is typical of Piedmont upland and bottomland communities.
However, smaller unique ecosystems are also present. Exhibit 4-9 presents a listing of natural communities
within the Study Area (North Carolina Natural Heritage Program [NCNHP], 2013).

4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
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EXHIBIT 4-9
Natural Communities
Source Basin Study Area Receiving Basins Study Area
Piedmont Bottomland Forest (Typic Low Subtype) Piedmont Alluvial Forest
Mesic Mixed Hardwood Forest (Piedmont Subtype) Piedmont Monadnock Forest (Typic Subtype)
Dry-Mesic Oak–Hickory Forest (Piedmont Subtype) Mesic Mixed Hardwood Forest (Piedmont Subtype)
Piedmont Bottomland Forest (High Subtype)
Piedmont Alluvial Forest
Piedmont Levee Forest (Typic Subtype)
Source: NCNHP, 2013
Significant Natural Heritage Areas (SNHAs) also provide habitat for rare species and are listed in Exhibit 4-17.
Upland wildlife communities are home to Virginia opossum (Didelphis virginiana), raccoon (Procyon lotor),
eastern cottontail (Sylvilagus floridanus), gray squirrel (Sciurus carolinensis), red fox (Vulpes vulpes), gray fox
(Urocyon cinereoargenteus), white-tailed deer (Odocoileus virginianus), eastern mole (Scalopus aquaticus)
and several species of shrews and mice. Amphibians and reptiles are abundant and diverse. Frogs, turtles,
and water snakes inhabit wetlands and the perimeters of ponds and streams.
Bird life in the Study Area is typical of the Carolina Piedmont. The Northern cardinal (Cardinalis cardinalis),
American robin (Turdus migratorius), Carolina chickadee (Poecile carolinensis), Eastern bluebird (Sialia
sialis), Eastern towhee (Pipilo erythrophthalmus), various sparrow and warbler species, and other songbirds
make their homes in the backyard habitats and forests of the area. Hawks, such as the red-tailed hawk
(Buteo jamaicensis), owls, and vultures, are predator and scavenger species known to inhabit the area. The
open waters of Jordan Lake and the many ponds in the Study Area attract a variety of waterfowl, including
migratory species. Mallards, wood ducks, teal, and other ducks, as well as geese, may be seen during certain
seasons. Wading birds including great blue heron (Ardea herodias) and green heron (Butorides virescens)
may be encountered along water body shallows. The large open bodies of water also support predatory
bird populations, including bald eagle (Haliaeetus leucocephalus) and osprey (Pandion haliaetus).
Section 4.4.1.1 discusses more rare wildlife and wildlife habitats within the Study Area. Forested areas and
habitats are discussed in Section 4.8.
4.4.1 Threatened and Endangered Terrestrial Species
Specific regulations exist at the State and federal levels to protect endangered and threatened terrestrial
species and their habitats from impacts due to public or private projects and land-disturbing activities. The
primary law that protects sensitive wildlife species is the federal Endangered Species Act.
Information obtained from the USFWS list of Endangered and Threatened Species and Species of Concern
within the counties encompassed by the Study Area, including Wake (updated January 2014), Harnett
(updated September 2010), Johnston, Chatham, Orange, and Durham Counties in North Carolina (updated
December 2012), was analyzed to identify protected species with the potential to be present within the
Study Area. Exhibit 4-10 presents the list of federally protected terrestrial species with recent (not
historical) records within the Study Area.
Thirty wildlife species are federally listed in the counties encountered by the Study Area (Exhibit 4-10); of
these, five species are listed as endangered, one is listed as proposed, and one, the bald eagle (Haliaeetus
leucocephalus), is protected by the Bald and Golden Eagle Protection Act (USFWS, 2014a). An additional 23
species are listed as federal species of concern (FSC). Federally listed aquatic species and Significant Aquatic
Endangered Species Habitats (SAESHs) are discussed in Section 4.5.
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
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EXHIBIT 4-10
Federally Listed Terrestrial Wildlife and Plant Species Potentially Occurring Within the Study Area
Common Name Scientific Name
Federal
Status
Record
Status County
Vertebrate:
Bachman’s sparrow Aimophila aestivalis FSC Current Harnett, Chatham
Bald eagle Haliaeetus leucocephalus BGPA Current Wake, Johnston,
Harnett, Chatham,
Orange, Durham
Cerulean warbler Dendroica cerulea FSC Current Johnston
Northern long-eared bat Myotis septentrionalis P Current Wake
Northern pine snake Pituophis melanoleucus FSC Obscure Harnett
Red-cockaded woodpecker Picoides borealis E Current Wake, Johnston,
Harnett
Southern hognose snake Heterodon simus FSC Obscure Wake
Invertebrate:
Diana fritillary (butterfly) Speyeria diana FSC Current Wake
Septima’s clubtail Gomphus septima FSC Current Harnett, Chatham
Vascular Plant:
Bog oatgrass Danthonia epilis FSC Current Harnett
Bog spicebush Lindera subcoriacea FSC Current Wake, Johnston
Buttercup phacelia Phacelia covillei FSC Current Harnett, Chatham
Carolina bogmint Macbridea caroliniana FSC Current Johnston, Harnett
Carolina grass-of-parnassus Parnassia caroliniana FSC Current Harnett
Georgia lead-plant Amorpha georgiana var. georgiana FSC Current Harnett
Harperella Ptilimnium nodosum E Current Chatham
Michaux’s sumac Rhus michauxii E Current Wake, Durham
Pickering’s dawnflower Stylisma pickeringii var. pickeringii FSC Current Harnett
Ravine sedge Carex impressinervia FSC Current Harnett
Rough-leaved loosestrife Lysimachia asperulaefolia E Current Harnett
Roughleaf yellow-eyed grass Xyris scabrifolia FSC Current Harnett
Sandhills bog lily Lilium pyrophilium FSC Current Harnett
Sandhills milk-vetch Astragalus michauxii FSC Current Harnett
Smooth coneflower Echinacea laevigata E Current Durham
Spring-flowering goldenrod Solidago verna FSC Current Johnston, Harnett
Sweet pinesap Monotropsis odorata FSC Current Chatham, Orange,
Durham
Tall larkspur Delphinium exaltatum FSC Current Durham
Torrey’s Mountain-mint Pycnanthemum torrei FSC Current Orange
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
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EXHIBIT 4-10
Federally Listed Terrestrial Wildlife and Plant Species Potentially Occurring Within the Study Area
Common Name Scientific Name
Federal
Status
Record
Status County
Virginia least trillium Trillium pusillum var. virginianum FSC Current Wake
Well’s sandhill pixie-moss Pyxidanthera barbulata var.
brevifolia
FSC Current Harnett
Notes:
BGPA = Bald and Golden Eagle Protection Act
E = Endangered
FSC = Federal Species of Concern
P = Proposed
Source: USFWS, 2014a (Harnett County was last updated in 2010, Wake County was updated January 2014, and the remaining
counties were updated in 2012.)
4.5 Aquatic Resources
Water resources within the Study Area provide aquatic habitat for various species of fish, freshwater mussels,
and other aquatic organisms. Streams provide free-flowing, warm-water habitats with moderate gradients,
generally alternating pools and riffles, and substrates consisting mainly of rocks, gravel, sand, and mud. Many
ponds and lakes, including Jordan Lake, also provide warm-water habitat where recreational fishing
opportunities are available. Aquatic resources within the Study Area are varied and include important sport
fish, commercial fish, and rare species. In general, many fish within the area contain high concentrations of
mercury, similar to contamination observed throughout the country, due to atmospheric deposition of
mercury and bioaccumulation up the food chain (NCDENR, 2005).
Sport fishing in the Study Area occurs in farm ponds, municipal water supply reservoirs, and sections of the
rivers and their tributaries. Jordan Lake supports many different species of fish, including seven main
species of game fish: largemouth bass, crappie, striper, hybrids, bream, catfish, and white perch (North
Carolina Fish and Game, 2014). Popular sportfish species in the freshwater portion of the rivers and
reservoirs include bass, sunfish, crappie, and pickerel, among others. The river basins are also home to a
variety of other, non-game species of fish, including several species of catfish and carp (NCWRC, 2014). The
majority of commercial fishing occurs a substantial distance downstream from the Study Area.
Recreationally and commercially important anadromous species including striped bass, American and
hickory shad, and shortnosed and Atlantic sturgeon migrate into freshwater portions of the Cape Fear River,
Neuse River, and their tributaries to spawn (USFWS, 2014b).
Section 4.5.1.1 discusses the more rare aquatic species and habitats within the Study Area.
4.5.1 Threatened and Endangered Aquatic Species
Information obtained from the U.S. Fish & Wildlife Service (USFWS) list of Endangered and Threatened
Species and Species of Concern within the counties encountered by the Study Area including for Wake
(updated January 2014), Harnett (updated September 2010), Johnston, Chatham, Orange, and Durham
Counties in North Carolina (updated December 2012), was analyzed to identify protected aquatic species
with the potential to be present within the Study Area. Exhibit 4-11 presents the list of federally protected
aquatic species with recent (not historical) records within the Study Area.
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
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Eighteen species are federally listed in the counties encountered by the Study Area; of these, 3 species are
listed as endangered and 15 are listed as FSC.
EXHIBIT 4-11
Federally Listed Aquatic Species Potentially Occurring Within the Study Area
Common Name Scientific Name
Federal
Status
Record
Status County
Vertebrate:
American eel Anguilla rostrata FSC Current Wake, Johnston,
Harnett, Chatham,
Orange, Durham
Cape Fear shiner Notropis mekistocholas E Current Harnett, Chatham
Carolina darter Etheostoma collis lepidinion FSC Wake:
Probable/potential;
Others: Current
Wake, Chatham,
Orange, Durham
Carolina madtom Noturus furiosus FSC Current Wake, Johnston,
Durham
Carolina redhorse Moxostoma sp.2 FSC Current Harnett, Chatham
Pinewoods shiner Lythrurus matutinus FSC Current Wake, Johnston,
Durham
Roanoke bass Ambloplites cavifrons FSC Current Wake, Johnston,
Orange, Durham
Sandhills chub Semotilus lumbee FSC Current Harnett
Invertebrate:
Atlantic pigtoe Fusconaia masoni FSC Current Wake, Johnston,
Harnett, Chatham,
Orange, Durham
Brook floater Alasmidonta varicosa FSC Current Chatham, Orange
Carolina creekshell Villosa vaughaniana FSC Current Chatham
Dwarf wedgemussel Alasmidonta heterodon E Current Wake, Johnston,
Orange
Green floater Lasmigona subviridis FSC Current Wake, Johnston,
Orange, Durham
Panhandle pebblesnail Somatogyrus virginicus FSC Current Durham
Savannah lilliput Toxolasma pullus FSC Current Orange
Tar River spinymussel Elliptio steinstansana E Current Johnston
Yellow lampmussel Lampsilis cariosa FSC Current Johnston, Harnett,
Chatham, Orange,
Durham
Yellow lance Elliptio lanceolata FSC Current Wake, Johnston
Status
E = Endangered
FSC = Federal Species of Concern
Source: USFWS, 2014a (Harnett County was last updated in 2010, Wake County was updated January 2014, and the remaining counties
were updated in 2012.)
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
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4.5.2 Significant Aquatic Endangered Species Habitat
Approximately 33 miles of SAESHs occur in the Source Basin Study Area, primarily as part of Phil’s Creek,
Morgan Creek, Pritchard Creek, and unnamed tributaries. Within the Receiving Basins Study Area,
approximately 43 miles of endangered species habitat occur, primarily as part of Swift Creek, Macgregor
Downs Lake, Williams Branch, Speight Branch, and unnamed tributaries. Exhibit 4-12 presents the aquatic
SNHAs within the Study Area. Some of the species that these habitats support include the dwarf
wedgemussel, cape fear shiner, yellow lance, Atlantic pigtoe, green floater, and yellow lampmussel, among
others.
4.6 Land Cover
This section summarizes the existing land cover and land uses for the Source Basin Study Area and Receiving
Basins Study Area. The primary source for land cover information is the 2006 National Land Cover Database
(NLCD) (USGS, 2011). The satellite-based dataset was developed through efforts of a consortium of federal
and state agencies to provide detailed land cover information. Data are provided as a 30-meter grid of land
cover characterized into more than a dozen developed and undeveloped cover categories. Exhibit 4-13
illustrates the land cover categories within the Study Area and provides the acreage within each broad land
use category.
4.6.1 Source Basin
As shown in the Exhibit 4-13, approximately 14 percent of the Source Basin Study Area is developed open
space and approximately 10 percent other low-, medium-, or high-density developed areas. Approximately
55 percent of the Source Basin Study Area is currently forested, grassland, shrubland, or barren. Deciduous
forest is the largest cover type at 29 percent; evergreen forest is 21 percent. Approximately 10 percent of
the area is wetland or open water, mainly Jordan Lake.
4.6.2 Receiving Basins
As shown in Exhibit 4-13, approximately 26 percent of the Receiving Basins Study Area is developed open
space and approximately 21 percent other low-, medium-, or high-density developed areas. Approximately
35 percent of the Receiving Basins Study Area is currently forested, grassland, shrubland, or barren.
Deciduous forest is the largest cover type at 15 percent; evergreen forest is 10 percent. Approximately
9 percent of the area is wetland or open water.
Cape Fear
River Basin
Neuse River
Basin
Haw River
Basin
Harris Lake
B. Everett
Jordan Lake
Falls Lake
Cape Fear River
Ha
w River
CHATHAM
COUNTY
Northeast Creek
Crabtree Creek
Middle Creek
Swift Creek
Buckhorn
Creek
Black Creek
New H
ope Creek WAKE COUNTY
JOHNSTON COUNTY
HARNETT COUNTY
FRANKLIN COUNTYORANGE COUNTY
LEE COUNTY
DURHAM COUNTY
Upp
e
r Cape Fear River Aqu
atic Habitat
Middle Creek (Wake/Johnston) Aquatic Habitat
Haw River
Aquatic Habitat
University Lake Aquatic Habitat
Crabtree Creek Aquatic Habitat
New Hope Creek Aquatic Habitat
Rocky River Subbasin Aquatic Habitat
Swift Creek (
Wake
/Jo
hnston) Aquatic Habitat
EXHIBIT 4-12Wildlife and Natural Habitat
Interbasin Transfer (IBT) Environmental Assessment
Legend
Major Waterways
River Basin Boundary
Study Area Boundary
County Border
Major Waterbodies
Significant Natural Heritage Areas (SNHA)
Aquatic SNHA
NHEO - Colonial Wading Bird Colony
NHEO - Natural Community
$
01020Miles
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
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Cape Fear
River Basin
Neuse River
Basin
Haw River
Basin
Harris Lake
B. Everett
Jordan Lake
Falls Lake
Cape Fear River
Ha
w River
CHATHAM
COUNTY
Northeast Creek
Crabtree Creek
Middle Creek
Swift Creek
Buckhorn
Creek
Black Creek
New Hope Cr
eek WAKE COUNTY
JOHNSTON COUNTY
Y
HARNETT COUNTY
ORANGE COUNTY
LEE COUNTY
DURHAM COUNTY
EXHIBIT 4-13Land Cover
Interbasin Transfer (IBT) Environmental Assessment
Legend
Major Waterways
River Basin Boundary
Study Area Boundary
County Border
Major Waterbodies
Land Cover Values
Open Water
Developed, Open Space
Developed, Low Intensity
Developed, Medium Intensity
Developed, High Intensity
Barren Land (Rock/Sand/Clay)
Deciduous Forest
Evergreen Forest
Mixed Forest
Shrub/Scrub
Grassland/Herbaceous
Pasture/Hay
Cultivated Crops
Woody Wetlands
Emergent Herbaceous Wetlands
$
01020Miles
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4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
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4.7 Agricultural Land and Prime Farmland
The USDA Natural Resources Conservation Service has classified lands into three categories based on
suitability for agricultural uses. Prime farmland is land that has the best combination of physical and
chemical characteristics for producing food, feed, fiber, forage, oilseed, and other agricultural crops with
minimum inputs of fuel, fertilizer, pesticides, and labor, and without intolerable soil erosion, as determined
by the Secretary of Agriculture. Prime farmland is of major importance for meeting the nation’s short and
long range needs for food and fiber with minimal input of energy and economic resources and the least
damage to other environmental resources. Unique farmland is land other than prime farmland that is used
for production of specific high-value food and fiber crops, as determined by the Secretary of Agriculture.
Farmland, other than prime of unique farmland, is land that is of statewide or local importance for the
production of food feed, fiber, forage, or oilseed crops (USDA, 1981).
An analysis of cultivated area was conducted using the 2006 NLCD satellite imagery (USGS, 2011). Currently,
agriculture comprises a small portion of land cover for the Study Area. Approximately 7 percent of the
Source Basin Study Area and 10 percent of the Receiving Basins Study Area are in agricultural use.
Agricultural lands are dispersed throughout the source basin, with higher concentrations in the northwest
portion of the basin and directly east of Jordan Lake. Cultivated lands in the receiving basins are
concentrated in the east part of the basin, primarily along Middle Creek. These agricultural areas include
pockets of cultivated row crops and pasture areas. Major crops include tobacco, soybeans, wheat, barley,
oats, corn, and pastures and forages.
4.7.1 Source Basin
Prime farmlands are present within the Study Area. The major soil types in the Source Basin Study Area are
Appling, Creedmoor, Georgeville, Nanford, Tarrus, and Wedowee. These soils are mostly silt loams. Of the
major soil types within the Source Basin Study Area, Appling, Creedmoor, Herndon, Enon, and Wedowee are
listed as prime farmlands (USDA, 2014). Chewacla soils must be drained to be of use for agricultural
purposes. Other soil types considered of statewide importance include Georgeville, Nanford, and Tarrus.
Many of these soils, especially in the eastern portion of the Study Area, have been affected by development
and other soil disturbances and are not currently being used for agriculture.
4.7.2 Receiving Basins
The major soil types in the Receiving Basins Study Area are Appling, Cecil, Creedmoor, and White Store. Of
the major soil types within the Receiving Basins Study Area, Appling, and Creedmoor are listed as prime
farmlands (USDA, 2014). Chewacla soils must be drained to be of use for agricultural purposes. Other soil
types considered of statewide importance include Appling on steeper slopes, Mayodan thin silt loams, and
White Store. Many of these soils, especially in the western portion of the Study Area, have been affected by
development and other soil disturbances and are not currently being used for agriculture.
4.8 Forested Resources
Forests provide "quality of life" benefits for local communities and provide habitat for wildlife. Selected sites
may serve the community as parks, greenways, and recreational areas. Forested buffers protect water
quality in local streams by slowing stormwater runoff and removing nutrients, sediment, and other
pollutants. These areas can also be used as a buffer or screen between incompatible land uses. Forested
areas, if of significant enough size, can provide economic value through harvesting.
This section further describes those lands within the forested land use category. Although much of the
original forest community in the Study Area has been progressively harvested for wood products and
cleared for agricultural, residential, and industrial development, significant forested areas remain. Natural
reseeding of abandoned tracts of land usually results in a mixture of pine and second growth hardwoods.
Currently, approximately 48 percent (263 mi2) of the Study Area is in forested land use. Forested land
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-30
covers 219 mi2 within the Source Basin Study Area and 45 mi2 within the Receiving Basins Study Area (USGS,
2011).
CH2M HILL analyzed a source, the North Carolina Gap Analysis Program (GAP), which describes forested
resources within the Study Area (USGS, 2006). NC GAP is based on land cover data not land use data, which
are limited by parcel boundaries. These data provide a better understanding of the types of forest resources
present within the Study Area. The most dominant forest types within the Study Area are as follows:
 Piedmont/Mountains Dry-Mesic Oak and Hardwood Forests
- Covers 78 mi2 within the Study Area: 60 mi2 within the Source Basin Study Area and 18 mi2 within
the Receiving Basins Study Area.
- Dominant species include white oak (Quercus alba) and are also represented by sweetgum
(Liquidambar styraciflua) and tulip poplar (Liriodendron tulipifera) dominated forests.
 Piedmont Dry-Mesic Pine Forests
- Covers 68.4 mi2 within the Study Area: 54.5 mi2 within the Source Basin Study Area and 13.9 mi2
within the Receiving Basins Study Area.
- The dominant species is loblolly (Pinus taeda).
 Dry Mesic Oak Pine Forests
- Covers 65.6 mi2 within the Study Area: 51.7 mi2 within the Source Basin Study Area and 15.9 mi2
within the Receiving Basins Study Area.
- Dominant species assemblages include loblolly with white, southern red (Q. rubra), and/or post oak
(Q. stella) and loblolly with water oak (Q. nigra). Eastern red cedar (Juniperus virginiana) may co-
occur with post, black (Q. velutina), and blackjack oaks (Q. marilandica).
 Coniferous Cultivated Plantation (natural/planted)
- Covers 53 mi2 within the Study Area: 43.5 mi2 within the Source Basin Study Area and 9.5 mi2 within
the Receiving Basins Study Area.
- The dominant species is loblolly, but slash (P. elliottii) and longleaf pine (P. palustris) also occur.
Because of the fragmented and patchwork nature of the forested parcels of land in the Study Area, smaller
areas of forest are not suitable for continued silviculture use. However, forested areas being converted to
other land uses provide a one-time source of wood products.
Cape Fear
River Basin
Neuse River
Basin
Haw River
Basin
Harris Lake
B. Everett
Jordan Lake
Falls Lake
Cape Fear River
Ha
w River
Lee Game Land
Northeast Creek
Crabtree Creek
Middle Creek
Swift Creek
Buckhorn
Creek
Black Creek
New H
ope Creek
WAKE COUNTY
JOHNSTON COUNTY
CHATHAM
COUNTY
HARNETT COUNTY
FRANKLIN
ORANGE COUNTY
LEE COUNTY
DURHAM COUNTY
Raven Rock
State Park
William B. Umstead
State Park
Jordan Game Land
Butner-Falls of Neuse Game Land
Harris Game Land
Butner Falls of Neuse Safety Zone
Chatham Game Land
Jordan Waterfowl Impoundment
Butner-Falls of Neuse Waterfowl Impoundment
Harris Gameland
EXHIBIT 4-14Protected Lands
Interbasin Transfer (IBT) Environmental Assessment
Legend
Major Waterways
River Basin Boundary
Study Area Boundary
County Border
Major Waterbodies
Gamelands
Managed Areas
$
01020Miles
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4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
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4.9 Public Lands and Scenic and Natural Areas
This section discusses public or conservation lands, federal, State and local parks, and other scenic and
recreational areas including recreation areas, greenways, and gamelands. Open spaces provide scenic and
recreational opportunities for residents. These public lands, generally held in perpetuity, cannot typically be
redeveloped. The major parks, recreation areas, and public lands within the Study Area and within a 1-mile
buffer along streams and rivers are displayed in Exhibit 4-14; the largest is the Jordan Lake Recreation Area.
Gamelands within the Study Area were identified by using North Carolina Wildlife Resources Commission
(NCWRC) GIS coverage (NCWRC, 2013). Gamelands provide the public with recreational opportunities
including hunting. The gamelands within the Study Area are listed in Exhibit 4-15.
EXHIBIT 4-15 Gamelands
Gameland Acres within Study Area Gameland Total Acres
Chatham 2,723 1,667
Harris 12,299 931
Jordan 40,620 40,568
Lee 1,394 379
Source: NCWRC, 2013
SNHAs include those spaces within public lands or private conservation lands held by non-profit organizations
such as the Triangle Land Conservancy. These areas are home to rare plant or animal species, high-quality
natural communities, and geologic features and may provide scenic and recreational value to the community.
The NCNHP compiles the NCDENR list of SNHAs, as required by the Nature Preserve Act (GS Chapter 113-A-
164 of Article 9A). The sites included in the list are the best representatives of the natural diversity of North
Carolina and, therefore, have priority for protection. Inclusion in the list does not imply that any protection
or public access exists. The SNHAs within the Study Area are listed in Exhibit 4-16.
EXHIBIT 4-16
Significant Natural Heritage Areas
SNHA
Acres within
Study Area
SNHA Total
Acres County
Portion within
Towns’ Service
Areas
Source Basin Study Area
Bald Mountain 140.5 140.5 Orange No
Battle Park 80.8 80.8 Orange No
Beaver Creek Floodplain 172.1 172.1 Wake No
Bennett Mountain 84.2 84.2 Chatham No
Berryhill Rhododendron Bluff 15.4 15.4 Orange No
Big Oak Woods 56.6 56.6 Durham, Orange No
Big Woods Road Upland Forests 2,116.0 2,116.0 Chatham No
Blackwood Mountain 129.9 129.9 Orange No
Bolin Creek Natural Area 281.5 281.5 Orange No
Boothe Hill 117.2 117.3 Chatham No
Bush Creek Marshes 216.5 216.5 Chatham No
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-34
EXHIBIT 4-16
Significant Natural Heritage Areas
SNHA
Acres within
Study Area
SNHA Total
Acres County
Portion within
Towns’ Service
Areas
Calvander Laurel Bluff and Bottom 65.5 65.6 Orange No
Camp Agape 127.8 127.8 Harnett No
Cape Fear River/Buckhorn Levees 417.5 417.5 Chatham, Lee No
Cape Fear River/McKay Island Floodplain 1,140.5 1,140.6 Chatham, Lee No
Cub Creek Bottomlands and Beaver Ponds 103.3 103.3 Chatham, Orange No
Dry Creek/Mount Moriah Bottomland 523.3 523.3 Orange, Durham No
Eubanks Road Xeric Hardpan Forest 4.1 4.1 Orange No
Gum Springs Church Road Slopes 285.1 285.1 Chatham No
Haw River Aquatic Habitat 244.5 918.3 Chatham No
Haw River Dicentra Slopes 15.9 15.9 Chatham No
Haw River Levees and Bluffs 518.2 1,010.2 Chatham No
Henry J. Oosting Natural Area 193.7 193.7 Orange No
Herndon Creek Ravine 147.4 147.4 Chatham No
Kit Creek Slopes and Floodplain 55.4 55.4 Chatham No
Little Creek Bottomlands and Slopes 1,447.3 1,447.3 Durham, Orange No
Lower Deep River Slopes 538.6 611.2 Chatham No
Lower New Hope Creek Floodplain Forest and
Slopes 1,830.8 1,830.8 Durham, Chatham No
Lower Rocky River/Lower Deep River Aquatic
Habitat 153.6 396.7 Chatham, Lee No
Mason Farm/Laurel Hill Oak-Hickory Forest 447.4 447.4 Orange No
Meadow Flats 233.4 233.4 Orange No
Moncure Boggy Streamheads 269.1 269.1 Chatham No
Morgan Creek Bluffs 214.9 214.9 Orange No
Morgan Creek Floodplain Forest 1,589.0 1,589.0 Orange, Chatham, Durham No
New Hope Creek Bottomland Forest 987.1 987.1 Durham No
New Hope Overlook Bluff and Slopes 405.8 405.8 Chatham No
North Edwards Ridge 119.7 119.8 Chatham No
Northeast Creek Floodplain Forest 984.2 984.2 Chatham, Durham, Wake Yes
Northeast Creek/Panther Creek Dikes and
Bottomlands 498.7 498.7 Chatham Yes
Parkers Creek Ridges 226.9 226.9 Chatham No
Pickards Mountain 495.6 495.6 Orange No
Pittsboro Wilderness 272.6 1,830.7 Chatham No
Poes Ridge/Dam Road Upland Forests 177.6 177.6 Chatham No
Raven Rock State Park 4,138.5 8,276.9 Harnett No
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-35
EXHIBIT 4-16
Significant Natural Heritage Areas
SNHA
Acres within
Study Area
SNHA Total
Acres County
Portion within
Towns’ Service
Areas
Robeson Creek Depression and Hardpan 32.6 32.7 Chatham No
Robeson Creek Slopes 140.2 140.2 Chatham No
Shaddox Creek Swamp 22.6 22.6 Chatham No
Shearon Harris Longleaf Pine Forest 259.5 356.9 Wake No
Terrells Mountain 61.2 188.6 Chatham, Orange No
Third Fork Creek Wetlands 165.4 165.4 Durham No
University Lake Aquatic Habitat 163.2 163.2 Orange No
University Lake/McCauley Mountain Slopes 466.6 466.6 Orange No
Upper Cape Fear River Aquatic Habitat 852.7 3,769.2 Chatham, Harnett, Lee No
Weaver Creek Pine Forest 581.9 581.9 Chatham No
White Oak Creek Floodplain 613.8 613.8 Chatham, Wake No
SUBTOTAL 25,643.4 35,963.2
Receiving Basins Study Area
Bennett Place Forest 83.5 83.5 Durham No
Blue Pond Salamander Site 2.6 2.6 Wake No
Camp Pipsissewa 26.4 26.4 Orange No
Cates Creek Hardpan Forest 6.5 22.4 Orange No
Cates Creek Hardwood Forest 160.5 160.5 Orange No
Couch Mountain 263.9 263.9 Orange No
Crabtree Creek Aquatic Habitat 110.4 331.2 Wake No
Crabtree Creek Monadnock Ridge 396.4 3,298.1 Orange No
Crabtree Creek/Ebenezer Church Road Slopes 79.1 158.1 Wake No
Currie Hill 179.2 277.8 Orange No
Duke Forest Oak-Hickory Upland 594.1 1,270.0 Durham No
Gate 4 Mafic Forests 387.5 723.8 Durham No
Gate 9 Pond 410.0 410.0 Durham No
Hemlock Bluffs State Natural Area 122.0 122.0 Wake Yes
Lake Johnson Nature Park 76.7 131.7 Wake No
Middle Creek (Wake/Johnston) Aquatic Habitat 217.0 217.0 Johnston, Wake No
Middle Creek Amphibolite Slope 36.8 36.8 Johnston No
Middle Creek Bluffs and Floodplain 358.0 358.0 Wake Yes
Middle Creek Floodplain Knolls 149.1 149.1 Johnston No
Neuse River (Clayton) Forests 418.4 1,121.3 Wake No
New Hope Chestnut Oak Forest 38.4 38.4 Orange No
New Hope Church Road Basic Forest 35.5 35.5 Orange No
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-36
EXHIBIT 4-16
Significant Natural Heritage Areas
SNHA
Acres within
Study Area
SNHA Total
Acres County
Portion within
Towns’ Service
Areas
New Hope Creek Aquatic Habitat 40.2 131.4 Orange No
New Hope Creek Slopes 477.0 1,898.7 Orange No
Richland Creek Hardwood Forest 73.6 73.6 Wake No
Steep Bottom Branch Slopes 213.8 213.8 Orange No
Stirrup Iron Creek Marsh and Sloughs 435.8 435.7 Durham No
Stony Creek Spring 42.4 81.3 Orange No
Swift Creek (Wake/Johnston) Aquatic Habitat 31.3 242.5 Johnston No
Swift Creek Bluffs 48.5 48.5 Wake Yes
Walnut Creek Bottomland Forests 47.3 300.6 Wake No
Walnut Creek Sumac Site 5.1 5.1 Wake No
William B. Umstead State Park 5,511.8 11,157.6 Wake Yes
SUBTOTAL 11,078.8 23826.9
GRAND TOTAL 36,722.2 59,790.1
Source: NCNHP, 2014
4.10 Archaeological and Historic Resources
Archaeological sites are important because they contain the only material remains of Native American
cultures dating back 12,000 years throughout North Carolina. The Cape Fear and Neuse River basins contain
many archeological sites that have been surveyed. Several of these sites have significant archeological
resources from many native groups that lived in the region up until 200 years ago. More than
7,000 recorded archaeological sites are located within the Cape Fear River basin, almost 1,500 of which are
located in Wake County (North Carolina Department of Cultural Resources, 1999). Because of the size of the
project’s source and receiving basins and because no construction will occur with the project, preparation of
an archeological survey was not completed for this project.
Europeans settled the Upper Piedmont area in the 1700s. Historic structures from those periods are
significant because they preserve North Carolina history. The National Register of Historic Places (NRHP) is
the formal repository of information pertaining to historic structures and districts. Places considered for
listing include historic structures and districts, cemeteries, and archaeological sites. The Study Area contains
many listings which can be found on the NRHP National Register Information System Database (National
Park Service, 2012). Exhibit 4-17 lists the historic places within the Study Area. Fifty-eight sites are located
in the Source Basin Study Area, and 31 sites are located in the Receiving Basins Study Area.

4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-37
EXHIBIT 4-17
Historic Places
Source Basin Study Area Receiving Basins Study Area
Alberta Mill Complex American Tobacco Company Manufacturing Plant
American Tobacco Company Manufacturing Plant Apex Historic District
Apex City Hall Bloomsbury Historic District
Apex Historic District Burch Avenue Historic District
Apex Union Depot Carpenter Historic District
Beta Theta Pi Fraternity House Cary Historic District
Blacknall, Richard D., House Crabtree Creek Recreational Demonstration Area
Bull Durham Tobacco Factory Downtown Durham Historic District
Burch Avenue Historic District
Erwin Cotton Mills Company Mill No. 1 Headquarters
Building
Carolina Inn Fadum House
Carpenter Historic District Harris, Harwell Hamilton and Jean Bangs, House and Office
Carr, John C. and Binford, House Hawkins-Hartness House
Carrboro Commercial Historic District Heck-Andrews House
Chapel Hill Historic District Hi-Mount Historic District
Chapel Hill Town Hall Ivey–Ellington House
Chapel of the Cross Jones, Crabtree, House
Downtown Durham Historic District Jones, Nancy, House
Durham Cotton Mills Village Historic District Kamphoefner, Henry L., House
Durham Hosiery Mills No. 2–Service Printing Company Building Longview Gardens Historic District
Ebenezer Methodist Church Madonna Acres Historic District
Emmanuel AME Church Morehead Hill Historic District (Boundary Increase)
Erwin Cotton Mills Company Mill No. 1 Headquarters Building Morrisville Historic District
Forest Hills Historic District Oak View
Gimghoul Neighborhood Historic District Page, Williamson, House
Goodwin Farm Complex Page-Walker Hotel
Green Level Historic District Paschal House
Greystone Powe House
Hill, John Sprunt, House Pugh House
Hogan, Thomas and Mary, House Raleigh Bonded Warehouse
Lakewood Park Historic District Utley–Council House
Lawrence, Calvin Wray, House West Durham Historic District
Leigh Farm -
Liberty Warehouse Nos. 1 and 2 -
Lloyd, Thomas F., Historic District -
Mangum, Bartlett, House -
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-38
EXHIBIT 4-17
Historic Places
Source Basin Study Area Receiving Basins Study Area
Mangum, James, House -
Mason, John A., House -
McKinnon, Kenneth, House -
Meadowmont -
Morehead Hill Historic District -
New Hill Historic District -
North Carolina Central University -
North Carolina Mutual Life Insurance Company Building -
O'Brien, William Thomas, House -
O'Kelly's Chapel -
Old Chapel Hill Cemetery -
Old East, University of North Carolina -
Playmakers Theatre -
Rocky Ridge Farm Historic District -
Scarborough House -
Smith Warehouse -
St. Joseph's African Methodist Episcopal Church -
Stokesdale Historic District -
Stone, Joseph B., House -
Thomas, James A., Farm -
Venable Tobacco Company Prizery and Receiving Room -
Venable Tobacco Company Warehouse -
West Chapel Hill Historic District -
Source: National Park Service, 2012
4.11 Air Quality
The USEPA uses the Air Quality Index (AQI) to report ambient air quality conditions. The AQI includes these
classifications: good, moderate, unhealthy for sensitive groups, unhealthy, and hazardous. In 2012, the
median AQI in Wake County was 42, or good. No days were considered unhealthful and 4 days were
considered unhealthful for sensitive populations (USEPA, 2012).
A new, more stringent National Ambient Air Quality Standard for ozone was established by USEPA in 1997. As
of June 2005, Wake County, which was identified as a maintenance area, is no longer subject to the 1-hour
standard. In March 2008, USEPA further strengthened the national standards for 8-hour ozone levels. Since
2006, Wake County has been listed as a maintenance area for the 8-hour ozone standard. Ozone is not directly
emitted but is formed when sunlight reacts with volatile organic compounds and nitrogen oxides. Ozone is a
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-39
component of smog. The largest source of the precursors to the formation of ozone is exhaust from motor
vehicles. The Raleigh and Durham area is listed as a maintenance area for carbon monoxide, which is primarily
emitted from transportation and industrial sources (USEPA, 2013a).
North Carolina had its lowest ozone levels on record in 2013 since air monitoring began in the early 1970s. The
declining ozone levels coincided with lower emissions from the state's power plants. A report by the NCDENR
Division of Air Quality shows that the state’s coal-fired power plants have cut nitrogen oxide emissions, a
primary industrial contributor to ozone pollution, by more than 80 percent since the General Assembly
enacted the Clean Smokestacks Act in 2002 (NCDENR, 2013c).
4.12 Noise Levels
Within the Study Area, noise is created primarily by three sources: vehicular traffic, RDU Airport, and
seasonal recreational use of lakes. Noise levels are highest along traffic corridors, with lower noise levels in
residential areas. Typical flight patterns for the RDU airport cross a small part of the northeast portion of the
Study Area. Seasonal use of Jordan Lake, in the Source Basin Study Area, for recreational purposes
contributes to increased noise during the warm months. Lesser contributors to noise include industrial and
agricultural activities. Undeveloped rural land is naturally devoid of significant human noises.
Sound is measured in decibels, a logarithmic scale; the measure of decibels on an A-weighted scale (dBA) is
used to characterize sound levels sensed by the human ear. The auditory threshold is 0 dBA; a deafening
sound is about 120 dBA. Typical daytime suburban noise levels, which would reasonably apply to the Study
Area, is about 55 dBA. Noises associated with vehicular traffic and localized noise associated with flight
patterns often exceed suburban noise levels. Noise in rural areas is typically less than 50 dBA unless the area
is close to roads or railroads.
4.13 Toxic Substances and Hazardous Wastes
Prior to the 1970s, few controls were in place to control the discharge of hazardous materials into the
environment. Toxic substances and their cleanup are enforced by USEPA regulations under the Resource
Conservation and Recovery Act and the Comprehensive Environmental Response, Compensation, and
Liability Act. The goals of these laws are to eliminate or reduce toxic waste; clean up waste that has been
leaked, spilled, or has been improperly disposed of; and protect people from harmful waste.
There is one Superfund site on the border between the Source Basin and Receiving Basin, the Koppers
Company, Inc. (Morrisville Plant) site, which includes an area where a wood treating facility operated from
1968 to 1975. USEPA placed the site on the National Priorities List (NPL) in 1989 because of contaminated
groundwater, soil, and surface water resulting from facility operations. Site conditions have been
investigated, steps have been taken to clean up the site, and site contamination does not currently threaten
people living and working near the site. By treating groundwater, evaluating additional cleanup activities,
and undertaking 5-year reviews, USEPA, NCDENR, and the site’s potentially responsible party continue to
protect people and the environment from site contamination (USEPA, 2013b).
A second Superfund site is located adjacent to the Study Area, the Ward Transformer site, which includes an
area where Ward Transformer Company operated a facility that handled transformers, switchgear, and
other types of electrical equipment from 1964 to 2006. USEPA placed the site on the NPL in 2003 because
of nearby contaminated fish tissue, sediment, and soil resulting from facility operations. Site conditions are
being investigated, steps are being taken to clean up the site, and site contamination does not currently
threaten people living and working near the site. By investigating the site, conducting cleanup activities, and
placing institutional controls on the site property, USEPA, NCDENR, and the site’s potentially responsible
parties continue to protect people and the environment from site contamination (USEPA, 2013c). This site is
located in the Receiving Basins Study Area upstream from Crabtree Creek, Lake Crabtree, Brier Creek, Little
Brier Creek, and Walnut Creek, all of which have been included on the State 303(d) list due to a fish
consumption advisory related to PCB contamination.
4 EXISTING ENVIRONMENTAL CONDITIONS IN THE STUDY AREA
4-40
Permit-requiring activities within the Study Area include treated water discharge permits, hazardous waste
operations, dry cleaners, and industrial activities. Nearby permit-requiring activities include operation of the
Shearon Harris Nuclear Power Plant (USEPA, 2013d) and a Wake County (Feltonsville) landfill near the Town
of Apex. The landfill has a non-discharge permit from DWQ for use of land application as waste disposal
(Buck Engineering, 2003).
Other potential sources for toxic substances present in the Study Area include agricultural-related
substances such as fertilizers, weed control chemicals, pesticides, and fuels from vehicles including cars and
boats. Other common toxic substances are employed in the construction of homes and commercial
buildings, including glues, solvents, and paints. Typical household hazardous wastes include oils, cleaners,
solvents, paints, herbicides, and fertilizers.

5-1
SECTION 5 Environmental Effects
For both the source and receiving basins, the direct environmental effects, if any, are described for the
resources discussed in Section 4. The discussion in this section focuses on the evaluation of direct effects on
water resources, aquatic resources and other resources in the Study Area as a result of the proposed
increase in IBT.
This EA concludes that the direct effects of the proposed IBT certificate modification on both the source
and receiving basins would be insignificant. As discussed in this section, the proposed IBT certificate
modification will not significantly change Jordan Lake elevations, water quality or water supply pool storage
volumes, downstream flows, downstream users’ water supply availability, or downstream water quality in
the source or receiving basins. Based on the hydrologic modeling, there are noticeable changes in a number
of the reviewed hydrologic indicators, but only as a result of future water withdrawals within the Cape Fear
River basin and full utilization of the Jordan Lake water supply pool. The Town’s existing discharges or
permits in the receiving basins will not be expanded as a result of the proposed IBT certificate modification.
No significant direct effects to environmental resources are expected.
No construction is associated with the requested increase in IBT, so there is little potential for direct effects
on land-based resources, and those effects would be addressed in environmental documents for
construction of the specific facilities. The facilities and water resources management plans associated with
this request are the same as those that were presented in the 2000 EIS (CH2M HILL, 2000), which is the basis
of the 2001 IBT Certificate. The extension of the planning period from 2030 to 2045 is the only substantive
change from the 2000 EIS. The ROD associated with the 2000 EIS stated that there were no direct impacts
associated with the transfer, and the potential SCI were being mitigated to a level deemed reasonable by
the EMC. In the time since the 2001 IBT Certificate was issued, no impacts from the IBT have been identified.
The potential for SCI resulting from the Towns’ land use plans and implementation of associated
infrastructure master plans is addressed in the Towns’ SCIMMPs (CH2M HILL, 2014a, 2014b, and 2014c).
The proposed increase in IBT is consistent with the plans addressed in the SCIMMPs. The Towns’ service
areas are predominantly the same as presented in the 2000 EIS (minor changes are inclusion of the Town of
Apex’s expanded service area in the Cape Fear subbasin and expansion of the Town of Cary’s service area
immediately north of the South Cary WRF and westward into Chatham County). Important SCI definitions
include the following:
 Cumulative effects are defined as “resulting from the incremental impact of the proposed activity when
added to other past, present, and reasonably foreseeable future activities regardless of what entities
undertake such other activities” (15A NCAC 1C .0101(d)(2)).
 Indirect effects, or secondary effects, are “caused by and result from the proposed activity although they
are later in time or further removed in distance, but they are still reasonably foreseeable” (15A NCAC 1C
.0101(d)(4)).
The SCIMMPs include a comprehensive description of mitigation programs to avoid or minimize SCI to
environmental resources that could occur with the Towns’ land use plans and implementation of projects in
the Towns’ infrastructure master plans.
5.1 Water Resources
5.1.1 Surface Water
The primary potential impact associated with IBT is typically water quantity in the source basin resulting
from the transfer of surface water. To evaluate the potential for water quantity effects within the Study
5 ENVIRONMENTAL EFFECTS
5-2
Area resulting from the increased IBT, the primary tool used was the combined Cape Fear–Neuse River Basin
Hydrologic Model (CFNRBHM). DWR originally developed individual hydrologic models for the Cape Fear and
Neuse River basins. In 2012, a combined model was created to facilitate analysis of the numerous
interconnections between the two basins. The resulting model was developed using the OASIS water
resources program which combines graphic representations of components such as river sections, demands,
and withdrawals, with logical statements that describe the components’ behavior. These statements,
including operational rules, demands, and elevation–storage relationships are evaluated within a linear
programming environment to determine the state of each component within the system (HydroLogics,
2006).
The revised base CFNRBHM was completed in January 2014 and includes all withdrawals and discharges in
both river basins greater than 100,000 gallons per day (i.e., 0.1 mgd). DWR modified the base model by
incorporating future demands to create several future scenarios. Estimates of existing demands and
discharges as well as projections to the year 2045 were developed by DWR by using local water supply plans
(LWSP), information provided directly from municipalities, and input from Triangle J Council of
Governments. The 2010 and 2045 OASIS model scenarios were obtained from DWR to evaluate the
hydrologic effects of the proposed increase in IBT on water resources. Additional model background, further
details regarding the structure of the CFNRBHM, and the model scenarios are discussed further in the
Modeling Evaluation of the Effects of the Cary/Apex Water Supply Interbasin Transfer Technical
Memorandum (CH2M HILL, 2014d), included in Appendix D.
The following four CFNRBHM scenarios were developed to establish baseline scenarios for the years 2010
and 2045, and to allow evaluation of the potential relative effects of the proposed increase in IBT and
alternatives:
 2010 Baseline – represents current conditions as defined by DWR
 2045 Baseline – represents Alternative 1 (no action) and Alternatives 3a through 3e (avoid an increase in
IBT)
- The 2045 Baseline scenario is intended to approximate 2045 conditions without the proposed
increase in IBT, and is based on the withdrawal and discharge values used in the 2000 EIS - the basis
of the Towns’ 2001 IBT certificate. The objective of this scenario is to represent EA alternatives
where the Towns do not increase their IBT above the Updated 2001 IBT Certificate limit. This
objective could be simulated by either constraining the water supply withdrawn from Jordan Lake
(the 2045 Baseline scenario) or by increasing the discharge/return to the Cape Fear River basin with
an increased Jordan Lake withdrawal. EA Alternatives 3a and 3b represent future scenarios with an
increased discharge to the Cape Fear River basin, but ultimately the results for scenarios explicitly
representing these alternatives would be very similar to the 2045 Baseline scenario. There may be a
small increased benefit to the lowest flow periods (downstream of Jordan Lake), but a significant
portion of the low flow hydrograph for the river will be controlled by the operational targets at the
Lillington USGS gage dictating the releases from the Jordan Lake water quality pool. Therefore, the
EA Alternatives that do not increase the Towns’ IBT (1 and 3a through 3e) are all represented by the
2045 Baseline scenario.
 2045 Expanded IBT – represents Alternative 2a (proposed increase in IBT)
 2045 Maximum IBT – represents Alternative 2b (increased discharge to the Neuse River basin)
To isolate the impact of the proposed increase in IBT from the effects of increased use of the Jordan Lake
water supply pool, all of the 2045 scenarios assume full allocation and use of the Jordan Lake water supply
pool (total average annual demand = 100 mgd). A summary of the model scenarios is provided in Exhibit 5-
1; additional details on each scenario can be found in Appendix D.

5 ENVIRONMENTAL EFFECTS
5-3
EXHIBIT 5-1
Summary of Hydrologic Model Scenarios

Model Scenario (EA Alternatives)
2010
Baseline a
2045
Baseline
(1, 3a -3e) a
2045
Requested IBT
(2a) a
2045
Increased Neuse
Discharge IBT (2b)
a
Updated 2001 IBT Certificate Yes Yes Yes Yes
Increased IBT No No Yes Yes
Jordan Lake Drought Contingency Plan –
Turned on in CFNRBHM Yes Yes Yes Yes
Water Shortage Response Plans –
Turned on in CFNRBHM Yes Yes Yes Yes
Cary/Apex Jordan Lake Average Day
Withdrawal (mgd) b 20.7 32.8 45.9 45.9
Jordan Lake Average Day Withdrawal by
Others (mgd) c 2.2 45.1 45.1 45.1
Additional Jordan Lake Average Day
Withdrawal for Full Utilization (mgd) N/A 22.1 9.0 9.0
Total Jordan Lake Average Day Demands
(mgd) 22.9 100.0 100.0 100.0
CAWTF Process Water Average Day
Discharges (mgd) 3.1 2.6d 6.6 6.6
Cary/Apex Cape Fear River Basin Average
Day WRF Discharges (mgd) 2.1 12.7 12.8 5.0
Cary/Apex Neuse River Basin Average Day
WRF Discharges (mgd) 14.1 8.4 22.3 30.1
Cary/Apex Average Day IBT (mgd) e, f 16 15 24 32
Cary/Apex Maximum Month Average Day
IBT (mgd) e, f 19 22 33 44
N/A – Not applicable
a Numbers have been rounded.
b Includes the Town of Apex, Cary, Morrisville and RTP South
c Includes Chatham County, Hillsborough, Orange County, Orange Water and Sewer Authority, Pittsboro, Holly Springs,
and the City of Durham as listed in Appendix D, Table 3.
d Based on 8 percent WTP process water loss (2000 EIS [CH2M HILL, 2000] analysis assumption).
e IBT values have been rounded to whole numbers.
f 2010 IBT value is based on input data to CFNRBHM; 2045 IBT values are projected based on forecasting data provided in
the LRWRP (CH2M HILL and Brown and Caldwell, 2013).

5 ENVIRONMENTAL EFFECTS
5-4
Output variables related to Jordan Lake elevation, water quality and water supply pool levels, and flows at
Lillington and Fayetteville - also used in the 2000 EIS - were selected in collaboration with DWR as key
hydrologic indicators for use in evaluating the relative effects of the alternatives. Model results for each
indicator were summarized using a variety of presentation formats including flow/level duration curves,
time series plots, and statistics during for both the period of record (January 1930 through September 2011)
and extreme drought conditions (1950s, 2002, and 2007 droughts). The Modeling Evaluation of the Effects
of the Cary/Apex Water Supply Interbasin Transfer Technical Memorandum (CH2M HILL, 2014d), Appendix
D, includes a detailed discussion of the modeling evaluation. The remainder of this section summarizes that
evaluation.
Exhibit 5-2 presents results showing the frequency with which the following conditions occur, using the
entire period of record, for each model scenario:
 Jordan Lake Levels less than 210 feet msl (lower limit for boat ramp use)
 Jordan Lake Levels < 210 ft. MSL (lower limit for boat ramp use); between Memorial Day and Labor Day
 Water Quality Pool less than 80 percent (Stage 1 Drought trigger, in accordance with the Jordan Lake
Drought Contingency Plan)
 Water Quality Pool less than 60 percent (Stage 2 Drought trigger, in accordance with the Jordan Lake
Drought Contingency Plan)
 Water Quality Pool less than 40 percent (Stage 3 Drought trigger, in accordance with the Jordan Lake
Drought Contingency Plan)
 Water Quality Pool less than 20 percent (Stage 4 Drought trigger, in accordance with the Jordan Lake
Drought Contingency Plan)
 Water Supply Pool less than 50 percent
 Cape Fear River Flow at Lillington less than 550 cfs (normal target flow is 600 ± 50 cfs)
 Cape Fear River Flow at Fayetteville less than 600 cfs
EXHIBIT 5-2
Comparison of the Percentage of the Period of Record Below the Key Hydrologic Indicators
Model Scenario
(as presented in Appendix D)
2010
Baseline
2045
Baseline
2045
Requested IBT
2045
Increased Neuse
Discharge IBT
EA Alternative 1 (no action)
and 3a through 3e 2a 2b
Jordan Lake Level < 210 feet msl 0.0% 1.6% 2.0% 2.0%
Jordan Lake Level < 210 feet msl,
Memorial Day to Labor Day 0.0% 0.2% 0.3% 0.4%
Water Quality Pool <80% 13.5% 15.8% 16.4% 16.9%
Water Quality Pool <60% 5.6% 5.9% 6.4% 6.5%
Water Quality Pool <40% 0.9% 0.5% 0.7% 0.8%
Water Quality Pool <20% 0.0% 0.0% 0.0% 0.0%
Water Supply Pool <50% 0.0% 1.6% 1.9% 1.9%
Flow at Lillington < 550 cfs 13.9% 15.6% 15.9% 16.4%
Flow at Fayetteville < 600 cfs 5.9% 6.1% 6.3% 6.7%
5 ENVIRONMENTAL EFFECTS
5-5
The following bullets provide a scenario comparison for the key hydrologic indicators:
 2045 Baseline vs. 2010 Baseline
- The modeling evaluation results indicate a potential for a small decrease in lake level and Cape Fear
River flow from the 2010 to 2045 Baseline scenario. This is attributed to the full utilization of the
Jordan Lake water supply pool and the increase in water withdrawals upstream of Jordan Lake –
both of which are assumed to happen regardless of whether there is any increase in the Towns’ IBT.
- The 2045 Baseline results are indicative of the potential effects of Alternatives 1 (no action) and 3a
through 3e – all of which represent no increase in IBT and the Towns’ continued operation under a
Updated 2001 IBT Certificate.
 2045 Requested IBT and 2045 Increased Neuse River Discharge vs. 2045 Baseline
- Under both the 2045 Requested IBT and 2045 Increased Neuse River Discharge scenarios, there is a
very small increase in duration that the lake level, as compared to the 2045 baseline scenario, is
below 210-ft MSL (0.4 percent increase in duration over the period of record), and both the water
supply and water quality pools operate at lower levels for a very small percentage of the period of
record (example: 0.6 percent increase in duration below 80 percent full for the water quality pool,
as compared to the 2045 baseline scenario).
- For all scenarios, the water quality pool never goes below 20 percent.
In addition to the key hydrologic indicators reviewed, Jordan Lake Drought Stages, as defined by the Jordan
Lake Drought Contingency Plan, and downstream water supply availability were reviewed. The following
bullets highlight the results:
 For all scenarios, there is no occurrence of a Stage 4 Drought, as defined in the Jordan Lake Drought
Contingency Plan, during the entire period of record.
 The frequencies and durations of Stage 1 and Stage 2 Droughts for all 2045 scenarios were greater than
the 2010 Baseline scenario, as would be expected based on the increased withdrawals within the Cape
Fear River basin and the assumed full utilization of the water supply pool.
 A beneficial effect of the 2045 scenarios, attributed to the increase in wastewater discharge to the Cape
Fear River from the WWRWRF resulting in a reduced need for releases from Jordan Lake during drought
periods, is that there is a lower frequency of Stage 3 Droughts for the 2045 scenarios when compared to
the 2010 Baseline scenario. The model results show that all downstream demands (City of Sanford,
Harnett County, City of Dunn, Fayetteville PWC, Smithfield Foods, Lower Cape Fear Water and Sewer
Authority, and Cape Fear Public Utility Authority) are met 100 percent of the time for all model
scenarios; no shortages result from the increase in future demands or from either of the scenarios with
an increase in IBT.
A comparison of in-stream flows under the 2045 Baseline and 2045 Requested IBT scenario was also
performed at the Lillington gage and at Fayetteville. It was determined that on average there is only a 10 cfs
(0.3 percent) difference between the scenarios for the period of record. During drought periods the 2045
Requested IBT scenario had a 0.2 to 1.9 percent increase in time below specific low flow targets (550 cfs and
250 cfs for Lillington; 600 cfs for Fayetteville). These results indicate that the proposed increase in IBT will
not affect the water quality pool sufficiently to reduce upstream releases from Jordan Lake required to
maintain in-stream flows, even during periods of drought. Downstream flow releases from Jordan Lake will
remain subject to the USACE release regimes, and the target flows at the Lillington gage, which protect in-
stream aquatic habitat and resources, will continue to be met.
A review of water shortage response plan (WSRP) implementation occurrences (frequency and duration) for
public water supply systems downstream of Jordan Lake with river flow based WSRP stage triggers, indicates
5 ENVIRONMENTAL EFFECTS
5-6
a potential increase in WSRP implementation occurrences for the City of Dunn, Fayetteville PWC and
Harnett County from the 2010 Baseline scenario to the 2045 scenarios. This increase is attributed to the
increase in water supply withdrawals within the Cape Fear River basin, including the assumed full utilization
of the Jordan Lake water supply pool. The 2045 Requested IBT model scenario results are not significantly
different in frequency or duration of WSRP implementation occurrences when compared to the 2045
Baseline scenario, increasing frequency of occurrence by one event (10 events instead of 9 events) and
duration for the longest drought event by approximately four days (25 days instead of 21 days).
The proposed increased IBT from Jordan Lake is not expected to significantly impact lake levels or
downstream flows; therefore, no impacts on water quantity or water quality near Jordan Lake or
downstream are expected. WWRWRF discharges into the Cape Fear River are expected to increase as
growth occurs and as the withdrawals from Jordan Lake increase. Water quality will be protected because
the WWRWRF has more stringent nutrient removal criteria in its NPDES permit than any other facility in the
Middle Cape Fear River basin.
Wastewater discharges are expected to increase in the Neuse River basin portion of the Receiving Basins but
are planned to be within the limits of the current NPDES permitted flows. No additional water quantity or
water quality impacts beyond those already accounted for in the NPDES permits are expected.
Potential SCI on surface waters from other factors such as growth are further discussed in Section 5 of the
SCIMMPs (CH2M HILL, 2014a, 2014b, and 2014c).
5.1.2 Groundwater
Shallow groundwater resources are connected to surface waters and wetlands and, therefore, have a
potential to be indirectly impacted if surface water hydrology is altered. Results of the hydrologic modeling
show that long-term changes to the Jordan Lake water surface elevation, pool volume, and in-stream flow
were minimal for all scenarios. These short drawdown periods are not expected to affect groundwater
levels. Increased withdrawal from Jordan Lake is not expected to impact lake levels; therefore, no impacts
on groundwater levels near Jordan Lake are expected.
5.1.3 Wetlands
Wetland complexes are present along the fringe of the Jordan Lake reservoir and where tributary streams
backwater as they flow into Jordan Lake. These wetlands would have the potential to be impacted by water
withdrawal if the withdrawal pattern changes the surface water elevation of Jordan Lake. Results of the
hydrologic modeling show that long-term changes to lake elevation and in-stream flow were minimal for all
scenarios. The primary difference is a result of future demands. During extreme droughts, the lake level
shows an additional but temporary drawdown of 1 to 2 feet. These short, 2 to 3 month, drawdown periods
should not have long-term effects on wetland areas. Riparian wetlands should not be affected, because the
lake is managed to maintain downstream flow levels. Even during extreme droughts, the water quality pool
storage volume is sufficient to maintain the target flows at Lillington. Potential SCI to wetlands are further
discussed in Section 5 of the SCIMMPs (CH2M HILL, 2014a, 2014b, and 2014c). Water needs for wetlands
adjacent to Jordan Lake should still be met, and impacts on these wetlands are not expected.
5.1.4 Topography
Topography, including floodplains adjacent to Jordan Lake and downstream, will not be impacted by the
additional water withdrawal. The impacts of topography on water surface elevation were minimal for all
scenarios. Floodplain functions will be unaltered.
5.2 Aquatic Resources
Aquatic resources in Jordan Lake, its tributaries, and in the downstream reaches of the Haw River and Cape
Fear River are not expected to be directly impacted by the proposed increase in water withdrawal from
Jordan Lake. Lake levels are not expected to be significantly altered, and downstream flow releases from
5 ENVIRONMENTAL EFFECTS
5-7
Jordan Lake will remain subject to the USACE release regimes. The Cape Fear River is designated as a
Primary Nursery Area below Buckhorn Dam and the maintenance of downstream flow release patterns is
important to anadromous fish, especially with regard to spring flows. In-stream flow patterns will not be
impacted, and the target flows at the Lillington gage, which protect in-stream aquatic habitat, aquatic
resources and water quality, will continue to be met.
5.3 Other Resources
Within the Study Area, other resources, as categorized in Section 4, include:
 Soils
 Wildlife Resources
 Land Cover
 Agricultural Land and Prime Farmland
 Forested Resources
 Public Lands and Scenic and Natural Areas
 Archaeological and Historic Resources
 Air Quality
 Noise Levels
 Toxic Substances/Hazardous Wastes
These resources are not expected to be directly affected by the proposed increase in IBT. This conclusion is
based on the following:
 There are no construction activities directly associated with the proposed increase in IBT.
 There have been no measurable impacts on the Jordan Lake water surface elevation or downstream
flow patterns as a result of the Towns’ current withdrawal and IBT, and the results of the hydrologic
modeling indicate that no significant impacts are expected in the future.
 Any future facility construction needed to meet 2045 water demands will undergo a separate
environmental permitting process and assessment of potential environmental impacts.

5 ENVIRONMENTAL EFFECTS
5-8

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6-1
SECTION 6 Mitigation
The Towns of Cary, Apex and Morrisville, as well as RTP South, are thriving communities in the heart of the
Triangle region of North Carolina, between the City of Raleigh and the RTP. The Triangle region has
repeatedly ranked among the top regions in the country in which to live or work, find a home or start a
business, raise a family, or retire.
To provide a high quality of life for its residents and continue to be an attractive place to live and raise a
family, the Towns are managing growth by using innovative planning approaches and techniques. The Towns
are always working to address environmental concerns related to open space, water and wastewater
infrastructure, transportation, and stormwater. The Towns have placed a high priority on preserving natural
and historical features and have focused on maintaining their unique downtown areas. The Towns have put
these priorities into action by developing individual SCIMMPs (CH2M HILL, 2014a, 2014b, and 2014c) and
have implemented programs to direct denser developments to designated activity and employment centers,
preserve open space, protect floodplain and riparian buffers, and maintain water quality through erosion
and sediment control and stormwater programs.
The SCIMMPs discuss the federal, State, and local programs that mitigate the potential SCI related to growth
facilitated to some extent by infrastructure and public utility projects, including this proposed increase in
IBT. The SCIMMPs discuss the potential for SCI to occur and the programs designed to mitigate SCI to a level
that is not expected to be significant. The SCIMMPs are included in this section by reference. Because no
construction is proposed as part of this IBT certificate modification, the only potential for direct effects is
related to water resources. As discussed in Section 5, the water withdrawal and wastewater discharges
related to the proposed IBT certificate modification are not expected to generate significant effects on
water resources in the Study Area. One way the Towns accomplish this is through management of their
water demands through the water resources management programs summarized in this section. Additional
information is provided in the SCIMMPs.
6.1 Water Conservation
Each Town uses education, regulations, and incentives to encourage water conservation by residents and
businesses, including the following components:
 Water waste is prohibited. No person shall operate an irrigation system in a manner that allows water to
fall on impervious surfaces (e.g., driveways, roads, and sidewalks).
 No person shall operate an irrigation system in a manner that allows water to accumulate and run off
the property.
 An odd/even day irrigation schedule for all customers is in place year-round, allowing customers to
irrigate 3 days per week. In Cary, hand-held hose watering and drip irrigation is allowed every day.
Exceptions can be made for newly placed sod.
 Rain sensors are required on all automatic irrigation systems to measure rainfall and override the
irrigation systems to shut them off. To meet the requirements of this ordinance, sensors should shut off
irrigation systems when ¼ inch of rain has fallen.
 The Towns use direct mailings, utility bill insert messages, appearances at community events, brochures,
flyers, messages in annual drinking water quality reports, and the Town Web sites to provide water
conservation information to customers.
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6-2
 The Town of Cary has a tiered rate system to incentivize water conservation. The highest rate tiers are
based on a “water budget” of 15,000 gallons, based on the maximum amount of water that could be
needed for landscape irrigation on a typical lot size. Non-residential domestic water meter and irrigation
meter budgets are developed on a site-specific basis. The Town also charges the lowest rate for use of
reclaimed water for non-potable uses, where applicable.
The Town of Cary’s water conservation program is presented in the LRWRP (CH2M HILL and Brown and
Caldwell, 2013), which evaluates the effectiveness of program measures and charts a course for future
measure implementation. The LRWRP provides an overarching road map for water resources management
for the future for each Town (CH2M HILL and Brown and Caldwell, 2013). A comprehensive summary of the
Towns (Cary and Apex) existing water conservation programs can be found in each Towns’ SCIMMP (CH2M
HILL, 2014a; 2014c)
6.2 Water Shortage Response Plan
Each Town has a water shortage response plan that outlines policies to implement water use reductions during
water shortage events. Each Town Manager is authorized by ordinance to invoke water use reduction or
rationing measures and to develop and enforce those water use reduction measures when a water emergency
exists. Voluntary, mandatory, and water-shortage-emergency measures may be imposed on all water customers
for the duration of the water emergency, depending on severity. The Towns have developed a staged water
use reduction system. Note that each stage imposes the requirements of all preceding stages.
The following factors are considered when implementing the water shortage response plans:
 Jordan Lake water supply storage volume
 Current level of Towns’ potable water demand
 Jordan Lake water surface elevation
 USACE operation of Jordan Lake in drought contingency mode
 Water quality concerns regarding Jordan Lake or other sources
 Drought advisories issued by the North Carolina Drought Management Advisory Council
 Sudden loss of supplemental water supplies during periods of high demand
6.3 Water Reuse
The Towns recognize that having a reclaimed water system reduces the amount of drinking water that is used for
non-potable water needs, such as irrigation and cooling towers. The use of reclaimed water reduces the water
that needs to be withdrawn from Jordan Lake, the Town’s water source. The Towns of Apex and Cary have
permits allowing the use of reclaimed water, and the LRWRP (CH2M HILL and Brown and Caldwell, 2013)
provides recommendations for the future use of reclaimed water by each Town.
The Town of Cary’s program is currently being expanded. The program is intended to provide a safe, cost-
effective, and beneficial alternative to using valuable drinking water for some non-potable water needs. The
system allows the Town to reduce the amount of wastewater that is discharged into Neuse River basin from the
Town’s WRFs (CH2M HILL and Brown and Caldwell, 2013; CDM Smith, 2013). The Town of Apex is currently
building demand for a reclaimed water system and plans to use its reclaimed water permit in the future. The
planning efforts for the future of the Towns’ reclaimed water systems demonstrate their commitment to
continue strong water stewardship, which includes using reclaimed water as a beneficial resource.
6.4 Water Quality Protection
The Towns’ ability to continue to meet their existing NPDES permit requirements as growth occurs is critical
for the protection of in-stream water quality in their receiving waters. The WWRWRF discharges into the
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Cape Fear River, and the discharges are expected to increase as growth occurs and as the withdrawals from
Jordan Lake increase. Water quality will be protected because the WWRWRF has more stringent nutrient
removal criteria in its NPDES permit than any other facility in the Middle Cape Fear River basin.
Wastewater discharges are also expected to increase in the Neuse River basin portion of the Receiving
Basins, but they are expected to be within the limits of the current NPDES permitted discharge amounts. No
additional water quantity or water quality impacts beyond those already accounted for in the NPDES
permits are expected. The NPDES permitting process, including setting limits, monitoring and enforcement,
will ensure water quality conditions in the receiving streams are maintained as growth occurs (CH2M HILL,
2014a, 2014b, and 2014c).
6.5 Regional Water Supply Collaboration
Efforts to balance the water supply needs of those utilities in the Jordan Lake watershed with needs of the
environment and downstream utilities are ongoing. The Triangle Regional Water Supply Plan was developed
by local governments and water agencies to enhance the long-term sustainability, security, and reliability of
the region’s water supply, including Jordan Lake (Triangle J Council of Governments, 2012). One group that
was created in 2009 during the regional planning process was the Jordan Lake Regional Water Supply
Partnership, or JLP. The ongoing Jordan Lake water supply pool allocation process is one collaborative
planning effort currently in process.
In addition to the water supply planning efforts currently underway, the USACE has a drought contingency
plan for Jordan Lake, which outlines water management measures and coordination actions in the event of a
severe drought. The water level is used as the primary drought indicator. More prescriptive management
plans are provided in the Jordan Lake Drought Management Plan (NCDENR, 2002c).

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7-1
SECTION 7 References
American Water Works Association (AWWA). 2001. Impact of the National Plumbing Standards on Water
Infrastructure Investments. Prepared by California Urban Water Conservation Council and Maddaus Water
Management.
Buck Engineering. 2003. Middle Cape Fear Local Watershed Plan, Technical Memorandum 1: Watershed
Characterization. August.
CDM. 2003. Wake County, Comprehensive Groundwater Investigation, Final Report. Prepared for Wake
County, North Carolina. June.
CDM Smith. 2013. Reclaimed Water Master Plan Update. Prepared for the Town of Cary, North Carolina.
July.
CH2M HILL. 2014a. Draft Secondary and Cumulative Impacts Master Management Plan, Cary, North
Carolina.
CH2M HILL. 2014b. Draft Secondary and Cumulative Impacts Master Management Plan, Morrisville, North
Carolina.
CH2M HILL. 2014c. Draft Secondary and Cumulative Impacts Master Management Plan, Apex, North
Carolina.
CH2M HILL. 2014d. Modeling Evaluation of the Effects of the Cary/Apex Water Supply Interbasin Transfer.
Technical memorandum. Prepared for the Towns of Cary and Apex, North Carolina.
CH2M HILL. 2005a. Secondary and Cumulative Impacts Master Mitigation Plan, Cary, North Carolina.
CH2M HILL. 2005b. Secondary and Cumulative Impacts Master Mitigation Plan, Morrisville, North Carolina.
CH2M HILL. 2005c. Secondary and Cumulative Impacts Master Mitigation Plan, Apex, North Carolina.
CH2M HILL. 2000. Final Environmental Impact Statement for RTP South and the Towns of Cary, Apex, and
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of Water Resources. Available at:
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http://www.townofcary.org/Departments/waterresources/water/longrangeplan.htm.
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http://www.ncfishandgame.com/north-carolina/jordan_lake.php Accessed February 2014.
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Carolina Water Quality Assessment and Impaired Waters List. Division of Water Resources (formerly Division
of Water Quality). Raleigh, North Carolina.
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Appendix A2001 Interbasin Transfer Certificate
This page has been intentionally left blank.
North Carolina Division of Water Resources I - 3 Jordan Lake Water Supply Storage Allocations Round Two
Environmental Management Commission and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report – Revised June, 2001
ENVIRONMENTAL MANAGEMENT COMMISSION
Certificate Authorizing the Towns of Cary, Apex, and Morrisville and Wake County
to Increase Their Transfer of Water
from the Haw River basin to the Neuse River basin
under the Provisions of G.S. 143-215.22I
On September 13, 2000, the Towns of Cary, Apex, and Morrisville and Wake County (for RTP
South) petitioned the Environmental Management Commission (EMC) for an increase in the
existing Cary/Apex interbasin transfer certificate from 16.0 to 27.0 million gallons per day,
incidental to their proposed increased withdrawals from Jordan Lake and discharge of treated
wastewater to tributaries of the Neuse River. Public hearings on the proposed transfer increase
were held in Raleigh on March 5, 2001 and in Fayetteville on March 6, 2001 pursuant to G.S.
143-215.22I. The original hearing officer’s report was prepared in April of 2001 and mailed to
members of the EMC on May 2, 2001. A revised hearing officer’s report was prepared in June
of 2001 and mailed to members of the EMC on July 3, 2001.
The EMC considered the petitioner’s request at its regular meeting on July 12, 2001. According
to G.S. 143-215.22I (g), the EMC shall issue a transfer certificate only if the benefits of the
proposed transfer outweigh the detriments of the proposed transfer, and the detriments have been
or will be mitigated to a reasonable degree.
The EMC may grant the petition in whole or in part, or deny it, and may require mitigation
measures to minimize detrimental effects. In making this determination, the EMC shall
specifically consider:
1.The necessity, reasonableness, and beneficial effects of the transfer
2.Detrimental effects on the source river basin
2a.The cumulative effect on the source major river basin of any water transfer or
consumptive water use
3.Detrimental effects on the receiving basin
4.Reasonable alternatives to the proposed transfer
5.Use of impounded storage
6.Purposes and water storage allocations in a US Army Corps of Engineers multi-
purpose reservoir
7.Any other facts or circumstances necessary to carry out the law
In addition, the certificate may require a drought management plan. The plan will describe the
actions a certificate holder will take to protect the source basin during drought conditions.
The members of the EMC reviewed and considered the complete record which included the
hearing officer’s report, staff recommendations, the applicant’s petition, the Final Environmental
Impact Statement, the public comments relating to the proposed interbasin transfer, and all of the
criteria specified above. Based on that record, the Commission makes the following findings of
fact.
North Carolina Division of Water Resources I - 4 Jordan Lake Water Supply Storage Allocations Round Two
Environmental Management Commission and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report – Revised June, 2001
Finding of Fact
THE COMMISSION FINDS:
(1)Necessity, Reasonableness, and Benefits of the Transfer
North Carolina has been enjoying significant population and job growth over the last
decade. Growth in the Triangle is centered on the Research Triangle Park and the
surrounding communities of Durham, Raleigh, Cary, Apex, and Morrisville. The
proposed transfer of water will provide water to three of these fast growing communities
in the Triangle. Their current combined population is about 122,900 with a maximum day
water use of 23.4 million gallons per day (mgd) and projected to grow to a population of
325,400 with maximum day water use of 53.6 mgd by 2030. This water will also support
economic development and job creation in the portion of RTP located in Wake County as
well as the workers who are attracted to the Triangle region to fill these jobs. Raleigh and
Durham each have dedicated sources of water that are adequate to meet current needs but
are inadequate in their current state of development to meet long term demands for these
communities. Raleigh and Durham do not have enough water to supply Cary, Apex, and
Morrisville to meet their long-term needs.
Cary and Apex are located on the eastern boundary of the Jordan Lake Project and have
invested in development of the only water supply intake on the lake, with approval of the
state, sized to allow the withdrawal of 50 mgd of water. The Cary-Apex water treatment
plant provides water to Cary, Apex, Morrisville, RTP, and Raleigh-Durham International
Airport. The Chatham County water system also receives raw water through this intake to
supply water to the eastern part of the county.
The state permitted the development of a raw water intake on the eastern shore of Jordan
Lake to supply surrounding communities from this regional water supply. Cary and Apex
received permission to use Jordan Lake water to meet their community needs and support
economic development in and around RTP. They received permission to transfer 16 mgd
of water from the Haw River Basin to the Neuse River Basin. This amount is no longer
adequate to meet the communities’ water demands. Durham and Raleigh have assisted
the communities receiving water from the Cary-Apex water system by providing water to
the system but can not continue because they need the water to meet demands within
their own service areas.
These petitioners have made a request to transfer enough water to meet their future needs.
The petitioners’ combined 2030 projected transfer amount is 24.1 mgd plus an additional
2.9 mgd contingency amount for a total requested amount of 27 mgd. The projected
2009 transfer amount is 27 mgd, which will drop to 17.9 mgd in 2010 when the regional
water reclamation facility becomes operational. The 24.1 mgd transfer amount assumes
that the Towns of Cary and Apex will construct a regional water reclamation facility that
would discharge to the Cape Fear River Basin by 2010, therefore limiting the need for
additional future transfers.
North Carolina Division of Water Resources I - 5 Jordan Lake Water Supply Storage Allocations Round Two
Environmental Management Commission and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report – Revised June, 2001
The transfer of water will benefit the Research Triangle Region by guaranteeing water to
support the economic development and associated population growth that have been
encouraged by the establishment of the Research Triangle Park.
Based on the record the Commission finds the transfer is necessary to supply water to the
growing communities of this area. Water from the source basin is readily available and
within a short distance from the service area. The applicants have reasonably mitigated
this need by returning treated wastewater to the source basin by December 31, 2009, and
therefore the transfer is a reasonable allocation to these communities. The transfer will
greatly benefit these communities by providing raw water of high quality for residential
and industrial purposes.
The Commission finds that the appropriate transfer amount should not include a
contingency factor, therefore 24 mgd is the appropriate necessary and reasonable
transfer amount.
(2)Detrimental Effects on the Source Basin
In order to assess the direct impacts of the proposed transfer on the source basin,
the petitioners participated in the development of a Cape Fear River Basin
Hydrologic Model that was developed for water supply planning, using Moffat &
Nichol and the Danish Hydraulic Institute as contractors. The model considers all
major water withdrawals (water supply and irrigation) and discharges within the
Cape Fear River basin, including those into and out of Jordan Lake. As required
under G.S. 143-215.22I(f)(2), local water supply plans were considered in
developing the model. In addition, industrial and agricultural withdrawals were
model inputs. Model runs for seven alternatives were evaluated for present and
2030 water demands. Impacts were assessed for the Jordan Lake watershed and
downstream to Lock and Dam Number 1, including impacts at Fayetteville.
The source for all of the petitioners’ water is the water supply pool of Jordan
Lake. The water supply pool is operated entirely separate from the low flow
augmentation pool. The low flow augmentation pool, not the water supply pool, is
dedicated to maintaining flows in the Cape Fear River downstream of Jordan
Lake dam. Therefore, the petitioners’ water supply withdrawals will have no
significant impact on the downstream flows as demonstrated with the model. A
comparison of the alternatives showed that the proposed transfer will not have any
significant impact on Jordan Lake surface water elevation, minimum releases
from the dam, water quality pool levels, the target flows at Lillington, flows at
Fayetteville, and water quality pool levels compared to the other alternatives and
to present conditions (see Appendix B in the EIS). As shown in the following
figure (Figure 14 from the EIS) there are no significant differences in flows at
Fayetteville.
North Carolina Division of Water Resources I - 6 Jordan Lake Water Supply Storage Allocations Round Two
Environmental Management Commission and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report – Revised June, 2001
Approximately two-thirds of Jordan Lake's conservation storage is dedicated to
maintaining minimum flows in the Cape Fear River, compared with the one-third
dedicated to water supply. Downstream users benefit from this low-flow
augmentation pool without requiring a Jordan Lake allocation and at no cost.
Upstream users do not benefit from the low flow augmentation pool. The historic
low flow of the Cape Fear River at Lillington was 75 cfs prior to regulation by
Jordan Dam. The target flow at Lillington is now 600 cfs, supported by the low
flow augmentation pool of Jordan Lake. This target flow is 8 times as great as the
historic low flow, and equivalent to 388 mgd. Even allowing for instream flow
requirements for habitat, an enormous amount of water is available to downstream
users. Based on the 1997 Local Water Supply Plans the projected water supply
demand for the middle Cape Fear River (Jordan Lake to Fayetteville) is 93.5 mgd.
The target flow of 388 mgd is over 4 times as great as the projected municipal
water supply demand.
Because wastewater assimilation is directly related to flows, no significant
changes in wastewater assimilation are expected from the proposed action.
Similarly, no impacts were identified for hydropower generation, navigation or
recreation.
Secondary effects from growth such as increased runoff, erosion, and loss of open
space are expected to have negative impacts on water quality and fish and wildlife
habitat. These impacts will be mitigated to a reasonable degree through existing
regulations and programs, as well as new initiatives. The most notable of these
initiatives are Cary’s Stream Buffer Ordinance and Open Space and Historic
Resources Plan
The Commission finds that it is reasonable to minimize the impacts of secondary
effects caused by growth in the Towns of Cary, Apex and Morrisville and Wake
County through the implementation of ordinances similar to the Neuse River
Buffer rules for the parts of their jurisdictions that are within the Jordan Lake
watershed for protection of the lake.
North Carolina Division of Water Resources I - 7 Jordan Lake Water Supply Storage Allocations Round Two
Environmental Management Commission and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report – Revised June, 2001
(2a)Cumulative effect on Source Basin of any transfers or consumptive water use
projected in local water supply plans
Local water supply plan data, including current and projected water use and water
transfers, were used to develop the input data sets for the Cape Fear River Basin
Model. The model was used to evaluate current and future scenarios of basin
water use.
In a statement to the Commission, a representative of the Public Works
Commission of Fayetteville asserted that the Department of Environmental and
Natural Resources had established a limit on the amount of water PWC could
withdraw from the Cape Fear River. He was asked to provide the Commission a
copy of that document. The document was a memo from the North Carolina
Division of Environmental Management (now the Division of Water Quality),
dated December 9, 1996 from Jason Doll transmitted through Ruth Swanek to
Tom Fransen, Division of Water Resources.
The sentence in that memo that caused concern to representatives of Fayetteville
states: “...our analysis indicates the City of Fayetteville could withdraw up to 60
MGD from the Cape Fear River without causing substantial declines in predicted
instream DO (dissolved oxygen) levels.”
North Carolina Division of Water Resources I - 8 Jordan Lake Water Supply Storage Allocations Round Two
Environmental Management Commission and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report – Revised June, 2001
That sentence does not limit how much water Fayetteville can withdraw from the
Cape Fear River. In fact, there is no existing regulation that explicitly limits the
amount of water Fayetteville can withdraw from the river. North Carolina does
not have a statewide permit system for water withdrawals. The only procedure
for issuing such permits is the Capacity Use Act of 1967. Under that authority,
the Environmental Management Commission must first declare a specific
geographical area to be a “capacity use area” based on findings that “aggregate
uses of groundwater or surface water, or both, in or affecting said area (i) have
developed or threatened to develop to a degree which requires coordination and
regulation, or (ii) exceed or threaten to exceed, or otherwise threaten or impair,
the renewal or replenishment of such waters or any part of them”. Only one area
of the state has ever been so designated, that being the area around the phosphate
mining operation near Aurora. Another area currently under consideration for
designation is a portion of the central coastal plain. No such designation has ever
been considered for surface water withdrawals from the Lower Cape Fear River,
and given the abundance of water in that area relative to current and foreseeable
use, it is highly unlikely that such an action would be contemplated for decades to
come. Given projected water use in the Lower Cape Fear River relative to
available supply, there is no foreseeable limit on withdrawals from the river.
The memo in question goes on to say that: “The Division (of Water Quality) does
not believe that our water quality predictions constitute a basis to impede
increases in withdrawal from the Cape Fear River by the City of Fayetteville.”
It does say that DWQ reserves the right to assign even more stringent effluent
limits in the future if the need arises. That statement would be true for all
dischargers in North Carolina. Details of the earlier analysis have been
challenged and are now under review. A consulting engineering firm, CH2MHill,
has been retained by the cities of Cary and Fayetteville to review and evaluate the
QUAL2E models used in that analysis. That review is expected to be completed
in August 2001 at the earliest.
Under no foreseeable circumstances, however, would Fayetteville’s withdrawal
be limited by water quality considerations. Durham and the Orange Water and
Sewer Authority (Chapel Hill/Carrboro) are permitted to discharge effluents from
their wastewater treatment plants into streams with low flows of less than 1.0
MGD. They are upstream of an arm of Jordan Lake that has a very long detention
time. When comparing those dischargers with Fayetteville, two factors are
important. First, effluent limits assigned to the Durham and Chapel Hill plants for
substances related to dissolved oxygen are very comparable to those for
Fayetteville plants. Current limits are given in the table below. Second, the Cape
Fear River at Fayetteville has critical low flows several hundred times those for
streams into which Chapel Hill and South Durham are discharging.
North Carolina Division of Water Resources I - 9 Jordan Lake Water Supply Storage Allocations Round Two
Environmental Management Commission and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report – Revised June, 2001
Effluent Limits
BOD Ammonia
mg/l mg/l
Facility summer/winter summer/winter
OWASA 4/8 2/4
South Durham 5/7 1/2
Fayetteville Cross Creek 6.8/8 1/2
Fayetteville Rockfish Crk 5/10 1/2
Furthermore, any effect on water quality due to Fayetteville’s withdrawals would
be limited primarily to that section of the river between the point of withdrawal
and the points of discharge.
Based on the modeling discussed in Finding No. 2, the Commission finds the
cumulative effects of this and other future water transfers or consumptive uses as
described in G.S. §143-215.22I(f)(2a) will be insignificant. Also, the EMC
concludes that, despite the language in the December 9, 1996 memorandum, the
proposed transfer will not adversely affect or limit water supply availability in the
Fayetteville area.
(3)Detrimental Effects on the Receiving Basin
The proposed transfer will utilize existing permitted wastewater discharges to the Neuse
River basin; therefore no plant expansions will be required. Previous studies for the
existing plants indicated no significant direct impacts to water quality or wastewater
assimilation on the receiving streams. Because stream flows in the Neuse River basin are
not expected to change significantly due to the proposal, no impacts are likely to occur to
navigation, recreation, or flooding. According to 1998 Neuse River Basinwide Water
Quality Plan: “Over 80% of the freshwater streams in the basin that have been monitored
are either impaired or rated as fully supporting but threatened. …. A major cause of this
impairment, especially in the upper basin, is population growth and urbanization, and
every indication is that this strong growth will continue for decades to come. In addition
to the tremendous challenges ahead in balancing the growth in the basin with the
restoration of its waters, it is also clear that if we are to prevent more waters from
becoming impaired in the future, and if the nutrient-related problems in the lower basin
and lakes are to be solved, it can no longer be business as usual in the Neuse.”
North Carolina Division of Water Resources I - 10 Jordan Lake Water Supply Storage Allocations Round Two
Environmental Management Commission and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report – Revised June, 2001
Based on the record the Commission finds the transfer will support continued population
growth and the attendant impacts of that growth. These impacts include effects on
wastewater assimilation, fish and wildlife habitat, and water quality similar to the
secondary growth effects described in Finding No. 2, above. However, these impacts will
be minimal. Reasonable mitigation is prohibiting additional wastewater treatment
facilities in the Neuse River basin as a result of this transfer and to limit the applicants’
existing Neuse River wastewater treatment facilities to their current permitted levels.
(4)Alternatives to Proposed Transfer
The petitioners evaluated six alternatives to the proposed transfer. The alternatives
considered include:
Alternative 1A: No IBT Increase and No Additional Jordan Lake Allocations
§ No increase in the existing 16-mgd (average day basis) Jordan Lake allocation
§ No increase in the existing IBT certificate (16 mgd on a maximum day basis)
§ No construction of a regional treatment and water reclamation facility
§ No other additional discharges to the source basin, in western Wake County
Alternative 1B: No IBT Increase with Additional Jordan Lake Allocations
§ Increases in Jordan Lake water supply allocations
§ No increase in existing IBT certificate (16 mgd on maximum day basis)
Alternative 2: Obtain Water From the Neuse River Basin
§ No increase in existing IBT certificate (16 mgd)
§ Regional Cape Fear WWTP
§ Purchase of finished water from the Neuse River basin
Alternative 3: Increase Wastewater Discharges to Cape Fear River Basin
§ No increase in existing IBT certificate (16 mgd)
§ Additional Jordan Lake water supply allocations
§ Relocation of existing Apex and Cary WWTP discharges to Cape Fear basin
§ Regional Cape Fear WWTP
Alternative 4:Merger of Water and Sewer Utility Operations of Town of Cary and City
of Durham
§ Institutional arrangement offsets existing Durham transfer (Neuse to Haw)
§ No increase in existing IBT certificate (16 mgd)
§ Additional Jordan Lake water supply allocations
§ Regional Cape Fear WWTP
North Carolina Division of Water Resources I - 11 Jordan Lake Water Supply Storage Allocations Round Two
Environmental Management Commission and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report – Revised June, 2001
Alternative 5: No Regional Treatment and Water Reclamation Facility
§ Discharge through existing WWTPs in Neuse River basin
§ Additional Jordan Lake water supply allocations
§ 45 mgd IBT
The table on the following page compares the proposed transfer with the six alternatives.
Factors used in the comparison of alternatives include:
§ required increase in interbasin transfer
§ direct and indirect impacts
§ ability to meet future water needs
§ capital cost
§ construction of a regional water reclamation facility
§ outside water purchases
§ expansion of Cary/Apex water treatment plant
Except for Alternative 1A, which does not serve the projected water supply needs of the
petitioners, the alternatives will not substantially reduce the expected impacts of the
proposed transfer increase. The only significant impacts associated with the proposed
transfer are secondary impacts associated with growth. All of the alternatives will have
essentially the same growth related impacts due to high rates of regional growth.
Based on these comparisons, the Commission finds that the proposed alternative is the
most feasible means of meeting the petitioners’ long-term water supply needs while
minimizing overall impacts and cost.
North Carolina Division of Water Resources I - 12 Jordan Lake Water Supply Storage Allocations
Environmental Management Commission Round Two and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report – Revised June, 2001
Summary of Alternatives
Alternatives
Item
Proposed
Action
1A
No Action
1B
No Action
2
Water From
Neuse
3
Move WWTP
Discharges
4
Merger with
Durham
5
No Regional
WWTP
Increase in IBT (mgd)11 0 0 0 0 0 29
Significant Direct Impacts No No No Yes Yes No Yes
Significant Secondary Impacts Yes Yes Yes Yes Yes Yes Yes
Additional Jordan Lake Allocations Yes No Yes Yes Yes Yes Yes
2030 MDD Water Demands (mgd)53.6 19 43.8 53.6 53.6 53.6 53.6
Maximum IBT (mgd)251 16 16 16 16 19
(Neuse to Haw)
45
Total Capital Cost (million)$225.7 $11.1 $206.6 $206.9 $279 $248 $84.0
Water Reuse 3.8 mgd 3.8 mgd 3.8 mgd 3.8 mgd 3.8 mgd 3.8 mgd 3.8 mgd
Construct Regional WWTP
(2030 max month capacity)
18.0 mgd No 18.0 mgd 18.0 mgd 18.0 mgd 18.0 mgd No
Finished Water Purchases
(2030 max day demand)
No No No 9.2 mgd No No No
Expand Cary/Apex WTP (capacity
beyond 40 mgd, max day basis)
20.0 mgd No 9.0 mgd 9.0 mgd 20.0 mgd 20.0 mgd 20.0 mgd
Note: 1Projected IBT in 2030 is approximately 25 mgd. The requested amount of 27 mgd includes some contingency
North Carolina Division of Water Resources I - 13 Jordan Lake Water Supply Storage Allocations Round Two
Environmental Management Commission and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report - Revised June, 2001
(5)Impoundment Storage
This criterion is not applicable, as the petitioners do not have an impoundment.
(6)Jordan Lake Purposes/Water Supply
The source of the water for this transfer is Jordan Lake, which is a multipurpose reservoir
constructed by the United States Army Corps of Engineers. One of the federally
authorized purposes of this reservoir is water supply. Water is allocated from this
reservoir intermittently. The applicants for this transfer plan to secure an allocation prior
to initiating this transfer.
The Commission finds that the transfer and allocations are consistent with the federally
authorized project purposes of Jordan Lake. Also, the Commission finds that to be
consistent with the use of Jordan Lake as a regional water supply Cary/Apex are
required to provide access through their intake with other Jordan Lake Water Allocation
Holders that need access to their allocation. The cost associated with getting any
necessary permits, engineering design, and associated construction costs are not the
responsibility of Cary/Apex.
(7)Other Considerations
The Commission finds that to protect the source basin during drought conditions, to
mitigate the future need for allocations of the limited resources of this basin, and as
authorized by G.S. § 143-215.22I(h), a drought management plan is appropriate. The
plan should describe the actions that the Towns of Cary, Apex, Morrisville and Wake
County (for RTP South) will take to protect the Cape Fear River Basin during drought
conditions.
The Commission notes that future developments may prove the projections and
predictions in the EIS to be incorrect and new information may become available that
shows that there are substantial environmental impacts associated with this transfer.
Therefore, to protect water quality and availability and associated benefits, modification
of the terms and conditions of the certificate may be necessary at a later date.
North Carolina Division of Water Resources I -Jordan Lake Water Supply Storage Allocations Round Two
Environmental Management Commission and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report - Revised June, 2001
14
Decision
Based on the hearing record and the recommendation of the hearing officers, the Commission, on
July 12, 2001, by duly made motions concludes that by a preponderance of the evidence based
upon the Findings of Fact stated above that (1) the benefits of the proposed transfer outweigh the
detriments of the proposed transfer, and (2) the detriments of the proposed transfer will be
mitigated to a reasonable degree. Therefore, and by duly made motions, the Commission grants
the petition of the Towns of Cary, Apex, Morrisville, and Wake County (with modification) to
increase their transfer of water from the Haw River basin to the Neuse River basin. The
permitted transfer amount shall be 24 million gallons per day (mgd) on a maximum day basis
from the effective date. This certificate supercedes any other transfer certificates held by the
Towns of Cary and Apex under G.S. § 143-215.22I and any other laws. This certificate is
effective immediately. The certificate is subject to the following conditions, imposed under the
authority of G.S. § 143-215.22I:
1. The holders of this certificate, after 2010, shall return water supplied from the Haw River
basin used in the Neuse River Basin to either the Haw or Cape Fear River basins as described
below:
(a) Any water used in the Neuse Basin in excess of 16 million gallons per day
adjusted on an average daily basis shall be returned.
(b) Water used for consumptive purposes in the Neuse Basin will not be subject
to this condition.
Nothing in this certificate shall decrease the amount of any transfer that existed
prior to July 1, 1993 or that was approved pursuant to G.S. § 162A-7 (repealed by
1993 Laws, ch. 348, § 6), as provided in G.S. § 143-215.22I(i), including such
approved transfer of 16 million gallons per day.
For purposes of this condition the average annual daily return to the Haw River
and Cape Fear River basin will be calculated as follows:
All amounts are a calendar year average annual daily amount in million of gallons
per day (mgd).
Peaking Factor (PF) = Maximum Daily Demand (MDD) / Average Daily Demand
(ADD)
For the first year PF = 1.64. Thereafter, the certificate holders annual compliance and
monitor report will include the information needed by the Division of Water Resources to
determine if an adjustment is needed for PF. The Division of Water Resources shall have
the authority to make modifications to PF as necessary to accurately reflect local water
use practices.
Consumptive use = C% of Finished Water (X) (average annual basis)
Neuse Consumptive use (CN) = C% of Finished Water (X) times Neuse Finished
Water (XN)
North Carolina Division of Water Resources I -Jordan Lake Water Supply Storage Allocations Round Two
Environmental Management Commission and Proposed Increase in Interbasin Transfer
Hearing Officers’ Report - Revised June, 2001
15
For the first year C% = 20%. Thereafter, the certificate holders annual compliance
and monitor report will include the information needed by the Division of Water
Resources to determine if an adjustment is needed for C%. The Division of Water
Resources shall have the authority to make modifications to C% as necessary to
accurately reflect local water use practices.
Required Return (RR) = (Neuse Finished Water (XN) - 16 mgd adjusted to an
average annual basis (16 / Peaking Factor (PF)) – Neuse Consumptive use (CN)
RR = (XN – 16/ PF) – C% XN
If RR is less than Zero then RR = 0
2. The holders of this certificate shall manage the authorized transfer amount in such a way that
none of the individual petitioners (Towns of Cary, Apex, Morrisville, and Wake County (for
RTP South)) are prevented from fully using their respective Jordan Lake water supply
allocations.
3. If the holders of this certificate discontinue their cooperative service agreement with each
other, the maximum day permitted transfer will be adjusted by the Division of Water
Resources based on the 2030 projected transfer of each applicant at that time.
4. Prior to transferring water under this certificate, the holders of this certificate shall work with
the Division of Water Resources to develop compliance and monitoring plan subject to
approval by the Division. The plan shall include methodologies and reporting schedules for
reporting the following information: maximum daily transfer amounts, compliance with
permit conditions, progress on mitigation measures, drought management, and reporting. A
copy of the approved plan shall be kept on file with the Division for public inspection. The
Division of Water Resources shall have the authority to make modifications to the
compliance and monitoring plan as necessary to assess compliance with the certificate.
5. If either the EIS is found at a later date to be incorrect or new information becomes available
such that the environmental impacts associated with this transfer are substantially different
from those projected impacts that formed the basis for the above Findings of Fact and this
certificate, the Commission may reopen the certificate to adjust the existing conditions or
require new conditions to ensure that the detriments continue to be mitigated to a reasonable
degree.
6. The Towns of Cary and Apex shall be required to provide access at their existing intake site
to other Jordan Lake water allocation holders that need access to utilize their allocation to the
extent that this additional use is determined to be feasible by the Division of Water
Resources. The cost associated with getting any necessary permits, engineering design, and
associated construction costs are the responsibility of the allocation holder(s) requesting the
access and not Cary and Apex.
Appendix B2013 Annual Report on Interbasin Transfers
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1
2013 ANNUAL REPORT on INTERBASIN TRANSFERS
for
RTP South and the Towns of Cary, Apex, and Morrisville

Prepared for:
Town of Apex
Town of Cary
Town of Morrisville
RTP South/Wake County

Submitted to:
North Carolina Division of Water Resources

April 2014

Prepared by:
Sydney Paul Miller
Water Resources Engineer
Town of Cary
PO Box 8005
Cary, NC 27512-8005
919-462-2066
[e-mail]

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2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville

Table of Contents
Executive Summary ............................................................................................................... ES-1
1. Jordan Lake Allocation Monitoring ......................................................................... 1-1
2. IBT Monitoring ............................................................................................................ 2-1
3. Compliance with Certificate Conditions ................................................................ 3-1

Appendix A: Daily Tracking of Combined Jordan Lake Water Supply Allocations for
2013 ................................................................................................................... A-1
Appendix B: Daily Interbasin Transfer Estimates for 2013 .............................................. B-1
Appendix C: Water Shortage Response Plans Updated for 2013………………… ..... ...C-1

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2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
ES-1
Executive Summary
The 2013 Annual Report on Interbasin Transfers for RTP South and the Towns of Cary, Apex,
and Morrisville includes monitoring data for daily tracking of IBT amounts and combined
Jordan Lake allocations held by the certificate holders.
The Town of Cary and Morrisville merged their utility systems on April 3, 2006. Cary is
responsible for providing billing and system maintenance for water and sewer services to
Morrisville and RTP South customers. Morrisville and Wake County RTP South, continue to
hold independent Jordan Lake water supply allocations.
In 2013, the certificate holders complied with all conditions of the IBT certificate. The maximum
daily IBT amount for Cary, Apex, Morrisville, and RTP South was 19.2 million gallons per day
(mgd). Maximum day IBT amounts and a summary of Jordan Lake withdrawals are provided in
Table ES-1. The daily IBT amounts in 2013 for Cary, Apex, Morrisville, and RTP South are
shown in Figure ES-1. The required average annual return of reclaimed water to the Cape Fear
or Haw basin was 0.0 mgd and the actual average reclaimed water return was 1.9 mgd (see
Table ES-2). The annual average IBT amount was 13.8 mgd.
Table ES-1
Summary of Interbasin Transfers for Cary, Apex, Morrisville and RTP South
Withdrawal from Haw
Subbasin (mgd)1
Total Return to Haw
Subbasin (mgd) 4
Interbasin Transfer
(mgd)
IBT as % of
Certificate
Calendar Year Average
Annual
Max. Day Average
Annual
Max. Day Average
Annual
Max.
Day
Max.
1998 10.8 15.7 1.7 3.5 9.0 14.3 90%
1999 9.2 15.6 1.6 4.2 7.6 12.9 81%
2000 7.3 14.2 1.1 4.4 6.2 11.8 74%
20012 9.7 18.8 2.8 9.4 6.8 15.0 63%3
2002 16.9 29.2 3.5 10.3 13.5 22.5 94%
2003 15.9 22.7 2.5 5.5 13.4 17.8 74%
2004 17.0 25.5 2.8 6.1 14.2 22.6 94%
2005 18.4 26.1 3.8 8.1 14.5 19.6 82%
2006 17.6 25.9 3.3 6.6 14.3 20.8 87%
2007 19.8 30.8 3.8 7.7 15.9 23.5 98%
2008 18.9 28.3 4.6 9.1 14.1 20.9 87%
2009 19.5 28.0 5.5 11.3 14.0 20.4 85%
2010 20.9 33.1 6.5 12.1 14.4 22.3 93%
2011 20.0 33.6 5.9 14.3 14.1 21.7 90%
2012 19.3 31.1 5.4 9.1 13.9 22.7 94%
2013 18.5 25.1 4.7 7.5 13.8 19.2 80%
1. Includes water use by Cary, Apex, Morrisville, and RTP South.
2. Withdrawals in 2001 were unusually high due to construction activities at the Cary/Apex WTP and do not reflect actual
potable water demands.
3. Permitted IBT amount increased from 16 mgd to 24 mgd in July 2001. The maximum day IBT of 15.0 mgd occurred
after the permitted amount increased to 24 mgd.
4. Includes consumptive use.
2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
ES-2

0.00
5.00
10.00
15.00
20.00
1/1 2/1 3/1 4/1 5/1 6/1 7/1 8/1 9/1 10/1 11/1 12/1
In
t
e
r
b
a
s
i
n

T
r
a
n
s
f
e
r

(
m
g
d
)
Figure ES-1: Daily Interbasin Transfer for Cary, Apex, Morrisville and RTP South
[Haw Sub-Basin to Neuse Sub-Basin]
Cary Apex Morrisville RTP

Table ES-2
Summary of Compliance with IBT Certificate Condition No. 1
Year Neuse
Finished
Water
from the
Haw
(mgd)
Peaking
Factor
16 mgd
MDD
adjusted
to ADD
Consumptive
Use Factor
(%)
Neuse
Consumptive
Use (from
the Haw)
(mgd)
Required
Return
(mgd)
Amount
Returned
(mgd)
(a) (b) (c)=16/(b) (d) (e)=(a)*(d) (f)=(a)-
(c)-(e)
(g)
2011 12.0 1.64 9.76 20% 2.4 0.0 2.0
2012 11.6 1.64 9.76 20% 2.3 0.0 2.0
2013 11.4 1.64 9.76 20% 2.3 0.0 1.9
a = Average annual transfer from Haw to Neuse (see Table B-1)
b = Peaking factor specified in Certificate for first year, and to be approved by DWR thereafter
d = Percent consumptive use specified in Certificate for first year and to be approved by DWR thereafter
g = Average annual wastewater discharges and water reuse in Haw and Cape Fear Basins (see Table B-1)

2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
1-1
1.0 Jordan Lake Allocation Monitoring
The combined Jordan Lake water supply allocation for Cary, Apex, Morrisville, and RTP
South can be tracked on a daily basis. Daily tracking of the combined Jordan Lake allocation
for the period January 1, 2013 through December 31, 2013 is included in Appendix A. The
water supply pool for each allocation holder was full on January 1, 2013.
The Town of Cary and the Town of Morrisville merged their utility systems on April 3, 2006,
and subsequently the Town of Cary began providing billing, facilities, and system
maintenance for water and sewer services to Morrisville customers. Morrisville continues to
hold its own Jordan Lake water supply allocation. For purposes of reporting on Jordan Lake
allocations and IBT, Cary and Morrisville measurements will continue to be reported
separately.
For 2013, the maximum day withdrawal for all certificate holders was 25.1 mgd, which
occurred on July 26th. The average daily withdrawal for all certificate holders was 18.5 mgd
during 2013 (Table 1-1).
Table 1-1
Summary of Jordan Lake Withdrawals1
Year Average Annual Withdrawal
(mgd)
Maximum Daily Withdrawal
(mgd)
19982 10.8 15.7
19992 9.2 15.6
2000 7.3 14.2
2001 9.7 18.8
2002 16.9 29.2
2003 15.9 22.7
2004 17.0 25.5
2005 18.4 26.1
2006 17.6 25.9
2007 19.8 30.8
2008 18.7 28.3
2009 19.5 28.0
2010 20.9 33.1
2011 20.0 33.6
2012 19.3 31.1
2013 18.5 25.1
1. Withdrawals from Jordan Lake at the Cary/Apex raw water intake. Includes water use by Apex, Cary, Morrisville and RTP South. Does not include water use by Durham.
2. Includes water use by Holly Springs from 1/1/98 to 6/30/99

2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
1-2
Table 1-2 presents historical water use for the certificate holders (Cary, Apex, Morrisville,
and RTP South) based on finished water produced at the Cary/Apex WTP plus purchases.
In 2013, finished water demands averaged 16.3 mgd and the maximum day demand was
22.8 mgd. The maximum day peaking factor was 1.40 in 2013.
Table 1-2
Summary of Finished Water Demands
Year Average Annual Demand
(mgd)
Maximum Daily Demand
(mgd)
Maximum Day/Average Day
Peaking Factor
19982 12.2 20.1 1.65
19992 12.6 21.5 1.71
2000 13.0 21.6 1.66
2001 14.2 22.0 1.55
2002 14.9 25.6 1.72
2003 13.9 19.9 1.43
2004 14.8 25.8 1.74
2005 15.6 22.6 1.45
2006 15.7 24.0 1.53
2007 17.9 28.1 1.57
2008 16.1 25.9 1.61
2009 16.1 24.6 1.53
2010 17.1 27.8 1.63
2011 17.2 27.6 1.61
2012 16.5 29.0 1.75
2013 16.3 22.8 1.40
1. Includes finished water delivered to the distribution system by the Cary/Apex WTP.
2. Includes water use by Holly Springs from 1/1/98 to 6/30/99.

2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
1-3
Water distributed to Morrisville and RTP South is not measured on a daily basis. Therefore,
accurate daily tracking of Jordan Lake water supply allocations can only be performed for
the combined Jordan Lake water supply allocation for Cary, Apex, Morrisville, and RTP
South. Figure 1 shows the partners’ combined water supply withdrawals and allocation
storage level for 2013. The minimum storage level for the combined allocation was 97.3%
occurring on October 31, 2013. The average percent storage was 99.9% for 2013.
0.00
5.00
10.00
15.00
20.00
25.00
30.00
4,780
6,780
8,780
10,780
12,780
14,780
16,780
01
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S
u
p
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y

W
i
t
h
d
r
a
w
a
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(
m
g
d
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St
o
r
a
g
e

L
e
v
e
l

(
a
c
-ft
)
Figure 1. Cary/Apex/Morrisville/RTP South Water Supply Allocation and
Withdrawals for 2013
Full Pool= 39% of Water Supply Pool
= 17,862 acre-feet

Individual Jordan Lake water allocation withdrawals are estimated on a daily basis using
monthly Morrisville and RTP South water usage records. Daily water use for Morrisville is
estimated from monthly retail billing data by assuming that water usage variations between
billing periods follow the same patterns as the total combined water use (“Net Cary” use).
Daily water use for RTP South is estimated similarly using monthly retail billing data,
assuming that water usage trends throughout the month follow similar patterns as Net
Cary. For a given day, the ratio of daily Net Cary water use to average Net Cary water use
for the period between monthly retail bills is applied to Morrisville and RTP South monthly
retail billed use.
Levels in individual water supply pools are calculated on a daily basis using daily water use
estimates and daily lake inflows. Lake inflow data is obtained from the US Army Corps of
Engineers and allocated to each water supply pool according to the percentage allocation
held. Any inflow amount that would fill the allocated storage above 100 percent is not
stored. Any time the elevation in Jordan Lake is at or above 216 feet mean sea level, the
water supply pools are reset to 100 percent full. If any allocation holder or larger pool has
excess inflow, it is first distributed within that pool to another user, if needed, before being
“spilled.”
Daily Withdrawal
Storage
2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
1-4
The daily Cary/Apex withdrawal amounts are estimated by subtracting the estimated daily
Morrisville and RTP flows from the metered total daily flow; Cary amounts are then
estimated by subtracting the daily recorded Apex flow from the remainder.
Cary/Apex holds a water supply storage allocation equal to 32 percent of the water supply
pool or 14,656 acre-feet. Figure 2 shows the Cary/Apex water supply withdrawals and the
allocation storage level for 2013. The minimum storage level for the Cary/Apex allocation
was 97.2% occurring on October 31, 2013. The average percent storage was 99.9% for 2013.
5.00
10.00
15.00
20.00
25.00
30.00
35.00
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
01
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m
g
d
)
St
o
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a
g
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L
e
v
e
l

(
a
c
-ft
)
Figure 2. Cary/Apex Water Supply Allocation and Withdrawals for 2013
Full Pool
= 32% of Water Supply Pool
= 14,656 acre-feet

Storage
Daily Withdrawal
2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
1-5
Morrisville holds a water supply storage allocation equal to 3.5 percent of the water supply
pool or 1,603 acre-feet. Figure 3 shows the Morrisville water supply withdrawals and
allocation storage level for 2013. The minimum storage level for the Morrisville allocation
was 96.2% occurring on October 31, 2013. The average percent storage was 99.8% for 2013.
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
500
700
900
1,100
1,300
1,500
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d
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L
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v
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l

(
a
c
-ft
)
Figure 3. MorrisvilleWater Supply Allocation and Withdrawals for 2013
Full Pool
= 3.5% of Water Supply Pool
= 1,603 acre-feet

Storage
Daily Withdrawal
2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
1-6
RTP South holds a water supply storage allocation equal to 3.5 percent of the water supply
pool or 1,603 acre-feet. Figure 4 shows the RTP South supply withdrawals and allocation
storage level for 2013. The minimum storage level for the RTP South allocation was 98.8%
occurring on September 18, 2013. The average percent storage was 100.0% for 2013.
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1,000
1,100
1,200
1,300
1,400
1,500
1,600
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(
a
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-ft
)
Figure 4. RTP South Water Supply Allocation and Withdrawals for 2013
Full Pool
= 3.5% of Water Supply Pool
= 1,603 acre-feet

Storage
Daily Withdrawal
2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
2-1
2.0 IBT Monitoring
Daily IBT estimates for the certificate holders are included in Appendix B. Estimates are
provided for the period January 1, 2013 through December 31, 2013. The maximum day IBT
transfer during the calendar year 2013 was 19.2 mgd, which occurred on July 24, 2013. This
represents 80 percent of the permitted IBT transfer, 24 mgd, under the certificate approved
by the EMC on July 12, 2001. The annual average IBT transfer was 13.8 mgd during calendar
year 2013. The average daily consumptive use was 11.3% for the period January 1, 2013
through December 31, 2013. Historical consumptive use is shown in Table 2-1.
TABLE 2-1
Historical Consumptive Use for Cary, Apex, Morrisville, and RTP South
Year Average Daily Finished
Water Demand
(mgd)
Average Daily
Consumptive Use
(mgd)
% Consumptive Use
19981 12.2 2.4 19.7%
19991 12.6 2.1 16.7%
2000 13.0 1.8 13.8%
2001 14.1 2.0 14.7%
2002 14.9 3.0 20.1%
2003 13.9 1.4 10.0%
2004 14.8 2.2 14.9%
2005

15.6 2.7 17.3%
2006 15.7 2.3 14.6%
2007 17.9 4.2 23.5%
2008 16.1 2.5 15.5%
2009 16.1 2.3 14.4%
2010 17.1 3.1 17.9%
2011 17.2 3.1 17.9%
2012 16.5 2.0 12.3%
2013 16.3 1.8 11.3%
1. Includes some water use by Holly Springs. Holly Springs purchased water from Apex in 1998 and 1999.

The distribution of consumptive uses between the Haw, Cape Fear, and Neuse River
subbasins for 2013 was estimated based on historical water use in each basin as determined
by billing records for each certificate holder. During 2013, based on the 2012 annual report,
it was assumed that 29.0% of water use occurred in the Haw subbasin, 0.9% of water use
occurred in the Cape Fear subbasin, and 70.1% of water use occurred in the Neuse River
subbasin. The certificate holders track historical use by assigning a subbasin to each
customer. Data on the distribution of water use between subbasins for each entity from 2000
through 2013, based on billing records, is shown in Table 2-2. For purposes of calculating
daily IBT amounts in 2014, the certificate holders estimate that 29.0% of their water use will
occur in the Haw subbasin and that 0.9% of their water use will occur in the Cape Fear
subbasin.
2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
2-2
TABLE 2-2
Distribution of Water Billed to Retail Customers by River Subbasin
Year Cary Apex Morrsiville1 RTP South

Total
Water
Use
(mgd)
Water
Use in
Haw
(mgd)
% Use
in Haw
Total
Water
Use
(mgd)
Water
Use in
Haw
(mgd)
% Use
in Haw
Water
Use in
Cape
Fear
(mgd)
% Use
in Cape
Fear
Total
Water
Use
(mgd)
Water
Use in
Haw
(mgd)
% Use
in Haw
Total
Water
Use
(mgd)
Water
Use in
Haw
(mgd)
% Use
in Haw
2000(1) 9.29 0.82 8.8% 1.65 0.82 49.9% 0.07 4.3% 0.86 0.05 6.20% 0.27 0.27 100%
2001 10.73 1.07 10.0% 1.88 1.03 54.8% 0.08 4.3% 1.05 0.06 6.20% 0.31 0.31 100%
2002 10.23 1.23 12.0% 2.15 1.29 60.0% 0.08 3.7% 1.18 0.14 11.2% 0.39 0.39 100%
2003 9.02 0.75 8.3% 1.94 1.15 59.3% 0.073 3.8% 1.10 0.15 14.0% 0.36 0.36 100%
2004 9.69 1.21 12.5% 2.12 1.28 60.2% 0.080 3.8% 1.26 0.19 14.9% 0.35 0.35 100%
2005 10.38 1.47 14.2% 2.25 1.40 62.2% 0.092 4.1% 1.32 0.21 16.1% 0.44 0.44 100%
2006 9.79 1.15 11.8% 2.20 1.35 61.5% 0.085 3.9% 1.36 0.22 16.1% 0.41 0.41 100%
2007 10.90 1.52 13.9% 2.75 1.74 63.3% 0.110 4.0% 1.39 0.24 17.3% 0.48 0.48 100%
2008 9.83 1.43 14.5% 2.36 1.46 62.0% 0.09 4.0% 1.33 0.26 19.5% 0.41 0.41 100%
2009 10.23 1.68 16.4% 2.65 1.68 63.3% 0.13 5.1% 1.40 0.29 20.4% 0.39 0.39 100%
2010 11.34 2.09 18.4% 2.97 1.89 63.6% 0.14 4.6% 1.64 0.34 20.8% 0.40 0.40 100%
2011 11.29 1.98 17.5% 2.73 1.72 62.9% 0.13 4.6% 1.71 0.35 20.6% 0.43 0.43 100%
2012 10.56 1.83 17.3% 2.63 1.62 61.6% 0.13 5.1% 1.62 0.32 19.9% 0.42 0.42 100%
2013 9.89 1.91 19.3% 2.60 1.56 60.2% 0.18 6.9% 1.46 0.33 22.6% 0.39 0.39 100%
1. Water use by basin for the Town of Morrisville is unavailable for 2000, and so the percentage was assumed to be the same as in 2001.

2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
2-4
Table 2-3 shows the combined water use for the certificate holders and the percentage water
use in the Haw and Cape Fear River Subbasins.
TABLE 2-3
Historical Water Use in the Haw and Cape Fear River Subbasins for Cary, Apex, Morrisville, and RTP South
Year Total Billed
Water Use
(mgd)
Water Use in
Haw Subbasin
(mgd)
Percent Use in
Haw Subbasin
Water Use in
Cape Fear
Subbasin
(mgd)
Percent Use in
Cape Fear
River Subbasin
2000(1) 12.07 1.97 16.3% 0.07 0.6%
2001 13.97 2.47 17.7% 0.08 0.6%
2002 13.95 3.05 21.8% 0.08 0.6%
2003 12.42 2.41 19.4% 0.07 0.6%
2004 13.42 3.03 22.5% 0.08 0.6%
2005 14.39 3.53 24.5% 0.09 0.6%
2006 13.75 3.13 22.7% 0.09 0.6%
2007 15.52 3.98 25.6% 0.11 0.7%
2008 13.93 3.96 25.6% 0.09 0.7%
2009 14.67 4.04 27.5% 0.13 0.9%
2010 16.34 4.71 28.8% 0.14 0.8%
2011 16.16 4.48 27.7% 0.13 0.8%
2012 15.23 4.19 27.5% 0.13 0.9%
2013 14.33 4.19 29.3% 0.18 1.3%
1. Water use by basin for the Town of Morrisville is unavailable for 2000, and so the percentage was assumed to be the
same as in 2001.

In 1998, 1999, 2000 and 2007, Apex along with Cary implemented mandatory irrigation
restrictions due to water supply limitations as well as IBT permit restrictions. The Town of
Morrisville asked residents to voluntarily conserve water beginning in 1998, further
implementing mandatory water use restrictions in July 1999. The restrictions reduced
consumptive water use from what would normally be expected during those years. In 2000,
Cary implemented a year round conservation program which includes: alternate day
watering, prohibition of water waste, a rain sensor requirement on all irrigation systems,
and an increasing block rate structure. In 2002, all of the Towns under this IBT certificate
instituted mandatory restrictions because of regional drought conditions, but they were
implemented after June which was when the highest water use occurred that year. Apex
continued stage II water restrictions through December 29, 2005 when they returned to stage
I, or voluntary water conservation measures. Starting April 3, 2006 the Cary and Morrisville
utility systems merged. As part of this merger Morrisville adopted Cary’s water
conservation ordinances and Cary staff began education and enforcement in both Cary and
Morrisville. On October 1, 2007, Apex adopted a year round alternate day watering
2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
2-4
ordinance. Also in 2007, Apex, Cary, Morrisville and RTP South implemented mandatory
irrigation restrictions. The changes in watering rules were made in response to Governor
Easley’s call for tougher water restrictions. The Apex Town Council adopted a ban on use of
outdoor fountains and automated and sprinkler irrigation effective October 19, 2007. On
November 1st 2007, the Town of Cary issued a Water Shortage Declaration, and citizens in
Cary, Morrisville and RTP South connected to the Town of Cary’s water system were no
longer able to water outdoors using irrigation systems, sprinklers, or other automated
watering devices; the Town also discontinued issuing three-week exemptions to its year-
round watering rules for establishing new grass or reseeding. These mandatory irrigation
restrictions for all the partners remained in effect until April 1, 2008.

2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
3-1
3.0 Compliance with Certificate Conditions
A summary of the conditions of the IBT certificate dated July 12, 2001, along with the
current status of compliance for each is provided below.
Condition 1 (2010 Required Return)
The holders of the certificate, after 2010, shall return water supplied from the Haw River Basin used
in the Neuse River Basin to either the Haw or Cape Fear River Basins as described below.
a) Any water use in the Neuse Basin in excess of 16 million gallons per day adjusted on an
average daily basis shall be returned.
b) Water used for consumptive purposes in the Neuse Basin will not be subject to this condition.
Compliance with this condition was not required until after 2010. However, the calculations
for determining compliance with Condition 1, shown in Table 3-1, began in 2001. The
amounts in column (a) are based on the percentage of billed water use in the Neuse Basin
applied to the total amount of water used. As reported in the 2010 annual report, the
calculation method was changed so Table 3-1 values shown reports for 2009 and earlier will
differ from what is shown in later years.
Figures 5 and 6 depict both the short and long-term plans for complying with Condition 1.
For IBT purposes, it would be best to return reclaimed water to the source (Haw) basin and,
more specifically, directly to the water supply source – Jordan Lake. Cary began returning
reclaimed water to Jordan Lake on April 19, 2005, by way of a wastewater treatment
interlocal agreement (ILA) between Cary and Durham County. Per the ILA, Durham
County treats wastewater for Cary from a service area that includes portions of Cary and
Morrisville and all of RTP South. The reclaimed water is returned to Jordan Lake after being
treated at the Durham County Triangle WWTP. Unfortunately, this arrangement to return
reclaimed water to Jordan Lake is not feasible as a long-term management approach.
Durham County will need the capacity of its Triangle WWTP for its own service area after
2015. A new discharge to Jordan Lake was investigated but deemed infeasible because of
TMDL requirements and the nutrient management strategy that has been developed for
Jordan Lake.
Since return of reclaimed water to the water supply source in the Haw basin is not feasible
for the long-term, Apex, Cary, and Morrisville, which are the Western Wake Partners
(Partners), investigated other alternatives and are implementing the Western Wake Regional
Wastewater Management Facilities which will include reclaimed water discharge to the
Cape Fear River below Buckhorn Dam. Apex, Cary and Morrisville wastewater will be
treated at the new Western Wake Water Reclamation Facility.
The Western Wake Regional Wastewater Management Facilities project includes multiple
components, which are being constructed through eight major construction contracts. More
information about the status of the project can be found at the Western Wake Partners’
website at http://www.westernwakepartners.org. The new facilities are expected to be on-
line in 2014.

2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
3-2

Apex
Holly Springs
Cary/Morrisville
Figure 5. Return to Haw River Basin, Before Western Wake WRF Startup (during 2014)
Condition 1
Return to
Haw River
(Source)
Basin
Withdrawal
Discharge
Withdrawal
Discharge
Withdrawal
Discharge
2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
3-3

Apex
Holly Springs
Cary/Morrisville
Figure 6. Proposed Return to Cape Fear River Basin, After Western Wake WRF Startup
(during 2014)
Condition
1 Return
to Cape
Fear Basin
Withdrawal
Discharge
2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
3-4

Table 3-1
Summary of Compliance with Certificate Condition No. 1
Year Neuse
Finished
Water
from the
Haw
(mgd)
Peaking
Factor
16 mgd
MDD
adjusted
to ADD
Consumptive
Use Factor
(%)
Neuse
Consumptive
Use (from
the Haw)
(mgd)
Required
Return if
After
2010
(mgd)
Amount
Returned
(mgd)
(a) (b) (c)=16/(b) (d) (e)=(a)*(d) (f)=(a)-
(c)-(e)
(g)
2001 5.1 1.64 9.76 20% 1.0 0.0 0.0
2002 11.3 1.64 9.76 20% 2.3 0.0 0.0
2003 10.6 1.64 9.76 20% 2.1 0.0 0.0
2004 11.6 1.64 9.76 20% 2.3 0.0 0.0
2005 11.9 1.64 9.76 20% 2.4 0.0 0.3
2006 11.5 1.64 9.76 20% 2.3 0.0 0.5
2007 13.3 1.64 9.76 20% 2.7 0.9 0.8
2008 11.5 1.64 9.76 20% 2.3 0.0 1.2
2009 11.5 1.64 9.76 20% 2.3 0.0 1.3
2010 12.2 1.64 9.76 20% 2.4 0.0 1.7
2011 12.0 1.64 9.76 20% 2.4 0.0 2.0
2012 11.6 1.64 9.76 20% 2.3 0.0 2.0
2013 11.4 1.64 9.76 20% 2.3 0.0 1.9
a = Average annual transfer from Haw to Neuse (see Table B-1)
b = Peaking factor specified in Certificate for first year, and to be approved by DWR thereafter
d = Percent consumptive use specified in Certificate for first year and to be approved by DWR thereafter
g = Average annual wastewater discharges and water reuse in Haw and Cape Fear Basins (see Table B-1)

Condition 2 (Facilitate Allocation Use)
The holders of this certificate shall manage the authorized transfer amount in such a way that none of
the individual petitioners (Towns of Cary, Apex, Morrisville, and Wake County [for RTP South]) are
prevented from fully using their respective Jordan Lake water supply allocations.
The IBT certificate requirements were not a limitation on Jordan Lake withdrawals for any
of the allocation holders in 2013.
Condition 3 (Disaggregation of IBT Amount)
If the certificate holders discontinue their cooperative service agreement with each other, the
maximum day permitted transfer will be adjusted by the Division of Water Resources based on the
2030 projections of each applicant at that time.
The cooperative service agreements between the certificate holders have remained in effect
during 2013.
2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
3-5
Condition 4 (Compliance and Monitoring Plan)
Prior to transferring water under this certificate, the holders of this certificate shall work with the
Division of Water Resources to develop compliance and monitoring plan subject to approval by the
Division. The plan shall include methodologies and reporting schedules for reporting the following
information: maximum day transfer amounts, compliance with permit conditions, progress on
mitigation measures, drought management, and reporting. A copy of the approved plan will be kept
on file with the Division for public inspection. The Division of Water Resources shall have the
authority to make modifications to the compliance and monitoring plan as necessary to assess
compliance with the certificate.
Cary, Apex, Morrisville, and RTP South submitted a Compliance and Monitoring Plan
concurrent with the submittal of the 2001 report. In 2003, the Division of Water Resources
agreed to modify the submittal date of each annual report to be May 1 of the following year.
Condition 5 (EMC Consideration of Impacts)
If either the EIS is found at a later date to be incorrect or new information becomes available such that
the environmental impacts associated with this transfer are substantially different from those
projected impacts that formed the basis for the above Findings of Fact and this certificate, the
Commission may reopen the certificate to adjust the existing conditions or require new conditions to
ensure that the detriments continue to be mitigated to a reasonable degree.
This condition requires no action by the certificate holders.
Condition 6 (Intake Access)
The Towns of Cary and Apex shall be required to provide access at their existing intake site to other
Jordan Lake water allocation holders that need access to utilize their allocation to the extent that this
additional use is determined to be feasible by the Division of Water Resources. The cost associated
with getting the necessary permits, engineering design, and associated construction costs are the
responsibility of the allocation holder(s) requesting the access and not Cary and Apex.
The Town of Cary has continued to provide retail water service to RTP South and starting
April 3rd, 2006, has merged utility services with the Town of Morrisville. Chatham County
has continued to access their allocation through the Cary/Apex raw water intake on Jordan
Lake.
Condition 7 (Drought Management Plan)
Prior to transferring water under this certificate, the Towns of Cary, Apex, and Morrisville, and
Wake County (for RTP South) shall develop individual water shortage response plans subject to
approval by the Division. The holders of this certificate shall develop a drought management plan for
the interbasin transfer, incorporating the individual water shortage response plans and subject to
approval by the Division. The plans shall tie specific water conservation actions to the percent storage
remaining in each of the petitioners’ Jordan Lake water supply accounts. A copy of the approved plans
shall be kept on file with the Division for public inspection. The Division of Water Resources shall
have the authority to approve modifications to the drought management plan as necessary.
Water Shortage Response Plans for each certificate holder were submitted as attachments to
the 2001 Annual Report and have been updated in later years. The current Water Shortage
Response Plans, which remained unchanged during 2013, are attached in Appendix C.
2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
3-6
Condition 8 (Stream Buffer Rules)
Within six months from the effective date of this certificate, the Towns of Cary, Apex, and
Morrisville, and Wake County (for RTP South) shall enact ordinances similar to or more protective
than the Neuse River buffer rules (15A NCAC 2B.0233) for the parts of their jurisdictions that are
within the Jordan Lake watershed. These buffer requirements shall be subject to approval by the
Division of Water Resources after consultation with the Division of Water Quality and shall be
adopted as local ordinances.
Each Town’s buffer ordinance was submitted with the 2001 Annual Report.
In 2004, there was one change:
1. The Town of Morrisville put 370,312 feet of 50-foot wide stream buffers under a
conservation easement.
In 2006, there were three changes:
1. The Town of Apex approved amendments to UDO Section 6.1.11 Riparian Buffers
which clarified the zones for riparian buffers associated with perennial streams Zone
1 of the perennial buffer was defined as the inner 60 feet and zone 2 as the outer 40
feet.
2. The Town of Apex clarified the uses permitted within riparian buffers to allow new
stormwater ponds (excluding dry ponds) that control nitrogen and associated
stormwater outfalls in zone 2 of the riparian buffer provided that diffuse flow is met
through zone 1 of the buffer. This is the outer 20 feet for an intermittent stream
buffer (50 feet) and the outer 40 feet for a perennial stream buffer (100 feet).
3. Wake County (for RTP South) adopted a Unified Development Ordinance (UDO) on
April 17th, 2006, which repealed and replaced the existing Zoning and Subdivision
Ordinances. The UDO consolidates development regulations into a single document.
In 2008, there was 1 change:
1. The Town of Morrisville adopted new engineering standards (Design and
Construction Ordinance), effective February 2008, which adopted revised stormwater
quantity and quality standards for the Town, including application of Neuse River
Basin performance standards throughout the jurisdiction.
In 2009, there was 1 change:
1. The Town of Morrisville approved amendments to its zoning ordinance (Zoning
Ordinance), effective July 23, 2009, which included provisions for riparian buffers in
the Cape Fear River Basin in response to the Jordan Lake Nutrient Management
Strategy Rules.
In 2010, there were 2 changes:
1. The Town of Apex approved changes to its riparian buffer rules (Watershed
Protection Overlay Districts), effective November 16, 2010, which incorporated the
requirements of the Jordan Lake Nutrient Management Strategy Rules.
2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
3-7
2. The Town of Cary approved minor changes to its riparian buffer rules (Land Use
Development Ordinance) to remove allowable uses in its table of uses that conflicted
with the Town’s 100 ft. buffer rule and the state’s 50 ft. buffer rule.
In 2011, there were 2 changes:
1. The Town of Cary approved modifications to the Jordan Lake Buffer to comply with
the Jordan Lake Rules passed in 2009, effective July 14, 2011.
2. The Town of Morrisville adopted a Riparian Buffer Ordinance (for lands within both
the Neuse River Basin and the Jordan Lake Watershed) to comply with the Jordan
Lake Rules.
In 2012, there was 1 change:
1. The Town of Morrisville made minor changes to its Riparian Buffer Ordinance that it
had adopted in 2011 to comply with the Jordan Lake Rules, as requested by NC
DWQ.
In 2013, there were no changes.
This page has been intentionally left blank. 

2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
A-1 2-1 1

Appendix A:
Daily Tracking of Combined Jordan Lake Water Supply
Allocations for 2013
This page has been intentionally left blank. 

TABLE A-1
Jordan Lake Water Supply Storage Allocation Tracking
Cary/Apex, Morrisville, and Wake County/RTP South COMBINED
Date
Reservoir
Level (ft)
Cary/Apex/
Morrisville/RTP
Water Supply
(mgd)
Cary/Apex/
Morrisville/RTP
Water Supply
(cfs)
Inflow to
Cary/Apex/
Morrisville/RTP
(cfs) 1
Cary/Apex/
Morrisville/RTP
Storage Level
(ac-ft)
Cary/Apex/
Morrisville/RTP
Storage Level
(%)
1/1/2013 215.12 16.12 24.94 24.94 17,862.00 100.00%
1/2/2013 215.18 16.07 24.86 24.86 17,862.00 100.00%
1/3/2013 215.28 17.39 26.90 26.90 17,862.00 100.00%
1/4/2013 215.36 16.76 25.93 25.93 17,862.00 100.00%
1/5/2013 215.42 15.82 24.47 24.47 17,862.00 100.00%
1/6/2013 215.48 15.85 24.52 24.52 17,862.00 100.00%
1/7/2013 215.51 16.02 24.78 24.78 17,862.00 100.00%
1/8/2013 215.53 15.72 24.32 24.32 17,862.00 100.00%
1/9/2013 215.54 15.69 24.27 24.27 17,862.00 100.00%
1/10/2013 215.55 16.77 25.94 25.94 17,862.00 100.00%
1/11/2013 215.58 15.48 23.95 23.95 17,862.00 100.00%
1/12/2013 215.60 14.46 22.37 22.37 17,862.00 100.00%
1/13/2013 215.62 16.71 25.85 25.85 17,862.00 100.00%
1/14/2013 215.64 16.64 25.74 25.74 17,862.00 100.00%
1/15/2013 215.71 16.24 25.12 25.12 17,862.00 100.00%
1/16/2013 215.96 15.74 24.35 24.35 17,862.00 100.00%
1/17/2013 216.62 14.78 22.86 22.86 17,862.00 100.00%
1/18/2013 218.91 15.63 24.18 24.18 17,862.00 100.00%
1/19/2013 219.86 15.88 24.57 24.57 17,862.00 100.00%
1/20/2013 219.75 15.77 24.40 24.40 17,862.00 100.00%
1/21/2013 219.31 15.09 23.34 23.34 17,862.00 100.00%
1/22/2013 218.73 16.43 25.42 25.42 17,862.00 100.00%
1/23/2013 218.19 15.78 24.41 24.41 17,862.00 100.00%
1/24/2013 217.53 15.87 24.55 24.55 17,862.00 100.00%
1/25/2013 217.00 15.98 24.72 24.72 17,862.00 100.00%
1/26/2013 216.80 14.70 22.74 22.74 17,862.00 100.00%
1/27/2013 216.64 14.91 23.07 23.07 17,862.00 100.00%
1/28/2013 216.58 16.30 25.22 25.22 17,862.00 100.00%
1/29/2013 216.55 15.37 23.78 23.78 17,862.00 100.00%
1/30/2013 216.35 14.92 23.08 23.08 17,862.00 100.00%
1/31/2013 216.53 14.50 22.43 22.43 17,862.00 100.00%
2/1/2013 216.74 14.40 22.28 22.28 17,862.00 100.00%
2/2/2013 216.74 14.78 22.86 22.86 17,862.00 100.00%
2/3/2013 216.74 14.82 22.93 22.93 17,862.00 100.00%
2/4/2013 216.67 16.74 25.90 25.90 17,862.00 100.00%
2/5/2013 216.61 16.66 25.77 25.77 17,862.00 100.00%
2/6/2013 216.52 14.83 22.94 22.94 17,862.00 100.00%
2/7/2013 216.52 16.05 24.83 24.83 17,862.00 100.00%
2/8/2013 216.80 16.77 25.94 25.94 17,862.00 100.00%
2/9/2013 217.03 16.63 25.73 25.73 17,862.00 100.00%
2/10/2013 216.75 15.89 24.58 24.58 17,862.00 100.00%
2/11/2013 216.60 16.30 25.22 25.22 17,862.00 100.00%
2/12/2013 216.63 16.03 24.80 24.80 17,862.00 100.00%
Page 1 of 9
TABLE A-1
Jordan Lake Water Supply Storage Allocation Tracking
Cary/Apex, Morrisville, and Wake County/RTP South COMBINED
Date
Reservoir
Level (ft)
Cary/Apex/
Morrisville/RTP
Water Supply
(mgd)
Cary/Apex/
Morrisville/RTP
Water Supply
(cfs)
Inflow to
Cary/Apex/
Morrisville/RTP
(cfs) 1
Cary/Apex/
Morrisville/RTP
Storage Level
(ac-ft)
Cary/Apex/
Morrisville/RTP
Storage Level
(%)
2/13/2013 216.57 15.79 24.43 24.43 17,862.00 100.00%
2/14/2013 216.45 15.59 24.12 24.12 17,862.00 100.00%
2/15/2013 216.37 16.07 24.86 24.86 17,862.00 100.00%
2/16/2013 216.26 14.97 23.16 23.16 17,862.00 100.00%
2/17/2013 216.12 14.79 22.88 22.88 17,862.00 100.00%
2/18/2013 216.16 17.82 27.57 27.57 17,862.00 100.00%
2/19/2013 216.25 16.19 25.05 25.05 17,862.00 100.00%
2/20/2013 216.30 15.83 24.49 24.49 17,862.00 100.00%
2/21/2013 216.34 15.96 24.69 24.69 17,862.00 100.00%
2/22/2013 216.44 15.70 24.29 24.29 17,862.00 100.00%
2/23/2013 216.82 15.35 23.75 23.75 17,862.00 100.00%
2/24/2013 217.23 15.61 24.15 24.15 17,862.00 100.00%
2/25/2013 217.25 16.39 25.36 25.36 17,862.00 100.00%
2/26/2013 217.49 16.00 24.75 24.75 17,862.00 100.00%
2/27/2013 218.56 15.72 24.32 24.32 17,862.00 100.00%
2/28/2013 218.67 15.30 23.67 23.67 17,862.00 100.00%
3/1/2013 218.30 18.41 28.48 28.48 17,862.00 100.00%
3/2/2013 217.78 15.66 24.23 24.23 17,862.00 100.00%
3/3/2013 217.16 15.64 24.20 24.20 17,862.00 100.00%
3/4/2013 216.77 17.73 27.43 27.43 17,862.00 100.00%
3/5/2013 216.74 17.41 26.93 26.93 17,862.00 100.00%
3/6/2013 216.67 18.31 28.33 28.33 17,862.00 100.00%
3/7/2013 216.62 19.64 30.38 30.38 17,862.00 100.00%
3/8/2013 216.51 18.07 27.95 27.95 17,862.00 100.00%
3/9/2013 216.36 15.99 24.74 24.74 17,862.00 100.00%
3/10/2013 216.27 16.19 25.05 25.05 17,862.00 100.00%
3/11/2013 216.25 18.55 28.70 28.70 17,862.00 100.00%
3/12/2013 216.43 18.24 28.22 28.22 17,862.00 100.00%
3/13/2013 216.98 19.46 30.10 30.10 17,862.00 100.00%
3/14/2013 216.83 18.38 28.43 28.43 17,862.00 100.00%
3/15/2013 216.62 16.39 25.36 25.36 17,862.00 100.00%
3/16/2013 216.54 16.25 25.14 25.14 17,862.00 100.00%
3/17/2013 216.44 16.04 24.81 24.81 17,862.00 100.00%
3/18/2013 216.36 18.21 28.17 28.17 17,862.00 100.00%
3/19/2013 216.42 18.21 28.17 28.17 17,862.00 100.00%
3/20/2013 216.43 17.63 27.27 27.27 17,862.00 100.00%
3/21/2013 216.44 16.97 26.25 26.25 17,862.00 100.00%
3/22/2013 216.39 19.36 29.95 29.95 17,862.00 100.00%
3/23/2013 216.34 16.88 26.11 26.11 17,862.00 100.00%
3/24/2013 216.40 16.64 25.74 25.74 17,862.00 100.00%
3/25/2013 216.68 16.93 26.19 26.19 17,862.00 100.00%
3/26/2013 216.79 18.73 28.98 28.98 17,862.00 100.00%
3/27/2013 216.48 17.59 27.21 27.21 17,862.00 100.00%
Page 2 of 9
TABLE A-1
Jordan Lake Water Supply Storage Allocation Tracking
Cary/Apex, Morrisville, and Wake County/RTP South COMBINED
Date
Reservoir
Level (ft)
Cary/Apex/
Morrisville/RTP
Water Supply
(mgd)
Cary/Apex/
Morrisville/RTP
Water Supply
(cfs)
Inflow to
Cary/Apex/
Morrisville/RTP
(cfs) 1
Cary/Apex/
Morrisville/RTP
Storage Level
(ac-ft)
Cary/Apex/
Morrisville/RTP
Storage Level
(%)
3/28/2013 216.48 17.81 27.55 27.55 17,862.00 100.00%
3/29/2013 216.36 17.07 26.41 26.41 17,862.00 100.00%
3/30/2013 216.32 16.09 24.89 24.89 17,862.00 100.00%
3/31/2013 216.41 16.63 25.73 25.73 17,862.00 100.00%
4/1/2013 216.56 18.52 28.65 28.65 17,862.00 100.00%
4/2/2013 216.59 15.69 24.27 24.27 17,862.00 100.00%
4/3/2013 216.43 16.18 25.03 25.03 17,862.00 100.00%
4/4/2013 216.53 16.97 26.25 26.25 17,862.00 100.00%
4/5/2013 216.94 15.97 24.71 24.71 17,862.00 100.00%
4/6/2013 217.03 16.87 26.10 26.10 17,862.00 100.00%
4/7/2013 216.73 16.87 26.10 26.10 17,862.00 100.00%
4/8/2013 216.48 17.40 26.92 26.92 17,862.00 100.00%
4/9/2013 216.35 17.60 27.23 27.23 17,862.00 100.00%
4/10/2013 216.28 18.83 29.13 29.13 17,862.00 100.00%
4/11/2013 216.28 18.35 28.39 28.39 17,862.00 100.00%
4/12/2013 216.43 15.94 24.66 24.66 17,862.00 100.00%
4/13/2013 216.42 17.81 27.55 27.55 17,862.00 100.00%
4/14/2013 216.32 17.53 27.12 27.12 17,862.00 100.00%
4/15/2013 216.21 19.69 30.46 30.46 17,862.00 100.00%
4/16/2013 216.17 17.59 27.21 27.21 17,862.00 100.00%
4/17/2013 216.17 17.90 27.69 27.69 17,862.00 100.00%
4/18/2013 216.19 18.66 28.87 28.87 17,862.00 100.00%
4/19/2013 216.27 20.01 30.96 30.96 17,862.00 100.00%
4/20/2013 216.39 16.59 25.66 25.66 17,862.00 100.00%
4/21/2013 216.45 16.65 25.76 25.76 17,862.00 100.00%
4/22/2013 216.35 19.66 30.41 30.41 17,862.00 100.00%
4/23/2013 216.21 16.90 26.14 26.14 17,862.00 100.00%
4/24/2013 216.21 17.81 27.55 27.55 17,862.00 100.00%
4/25/2013 216.20 20.01 30.96 30.96 17,862.00 100.00%
4/26/2013 216.17 18.43 28.51 28.51 17,862.00 100.00%
4/27/2013 216.14 18.76 29.02 29.02 17,862.00 100.00%
4/28/2013 216.21 18.70 28.93 28.93 17,862.00 100.00%
4/29/2013 216.70 17.69 27.37 27.37 17,862.00 100.00%
4/30/2013 217.23 17.73 27.43 27.43 17,862.00 100.00%
5/1/2013 217.27 17.12 26.48 26.48 17,862.00 100.00%
5/2/2013 217.22 16.98 26.27 26.27 17,862.00 100.00%
5/3/2013 217.05 18.37 28.42 28.42 17,862.00 100.00%
5/4/2013 216.83 19.47 30.12 30.12 17,862.00 100.00%
5/5/2013 216.57 17.85 27.61 27.61 17,862.00 100.00%
5/6/2013 216.60 16.05 24.83 24.83 17,862.00 100.00%
5/7/2013 217.00 17.41 26.93 26.93 17,862.00 100.00%
5/8/2013 217.21 19.39 30.00 30.00 17,862.00 100.00%
5/9/2013 217.10 17.71 27.40 27.40 17,862.00 100.00%
Page 3 of 9
TABLE A-1
Jordan Lake Water Supply Storage Allocation Tracking
Cary/Apex, Morrisville, and Wake County/RTP South COMBINED
Date
Reservoir
Level (ft)
Cary/Apex/
Morrisville/RTP
Water Supply
(mgd)
Cary/Apex/
Morrisville/RTP
Water Supply
(cfs)
Inflow to
Cary/Apex/
Morrisville/RTP
(cfs) 1
Cary/Apex/
Morrisville/RTP
Storage Level
(ac-ft)
Cary/Apex/
Morrisville/RTP
Storage Level
(%)
5/10/2013 216.84 17.83 27.58 27.58 17,862.00 100.00%
5/11/2013 216.62 17.91 27.71 27.71 17,862.00 100.00%
5/12/2013 216.50 18.15 28.08 28.08 17,862.00 100.00%
5/13/2013 216.34 18.07 27.95 27.95 17,862.00 100.00%
5/14/2013 216.23 20.71 32.04 32.04 17,862.00 100.00%
5/15/2013 216.23 18.49 28.60 28.60 17,862.00 100.00%
5/16/2013 216.21 21.96 33.97 33.97 17,862.00 100.00%
5/17/2013 216.17 20.80 32.18 32.18 17,862.00 100.00%
5/18/2013 216.20 18.63 28.82 28.82 17,862.00 100.00%
5/19/2013 216.40 18.24 28.22 28.22 17,862.00 100.00%
5/20/2013 216.91 16.99 26.28 26.28 17,862.00 100.00%
5/21/2013 217.53 18.67 28.88 28.88 17,862.00 100.00%
5/22/2013 217.62 18.45 28.54 28.54 17,862.00 100.00%
5/23/2013 217.48 18.14 28.06 28.06 17,862.00 100.00%
5/24/2013 217.33 19.01 29.41 29.41 17,862.00 100.00%
5/25/2013 216.93 18.25 28.23 28.23 17,862.00 100.00%
5/26/2013 216.52 19.03 29.44 29.44 17,862.00 100.00%
5/27/2013 216.22 16.72 25.87 25.87 17,862.00 100.00%
5/28/2013 216.10 22.00 34.03 34.03 17,862.00 100.00%
5/29/2013 216.12 21.94 33.94 33.94 17,862.00 100.00%
5/30/2013 216.14 22.76 35.21 35.21 17,862.00 100.00%
5/31/2013 216.12 24.38 37.72 37.72 17,862.00 100.00%
6/1/2013 216.10 24.81 38.38 38.38 17,862.00 100.00%
6/2/2013 216.07 23.16 35.83 35.83 17,862.00 100.00%
6/3/2013 216.17 18.23 28.20 28.20 17,862.00 100.00%
6/4/2013 216.29 19.73 30.52 30.52 17,862.00 100.00%
6/5/2013 216.37 22.89 35.41 35.41 17,862.00 100.00%
6/6/2013 216.42 19.50 30.17 30.17 17,862.00 100.00%
6/7/2013 217.61 17.14 26.52 26.52 17,862.00 100.00%
6/8/2013 219.28 18.56 28.71 28.71 17,862.00 100.00%
6/9/2013 219.92 18.48 28.59 28.59 17,862.00 100.00%
6/10/2013 220.42 19.44 30.07 30.07 17,862.00 100.00%
6/11/2013 221.06 19.64 30.38 30.38 17,862.00 100.00%
6/12/2013 220.75 20.20 31.25 31.25 17,862.00 100.00%
6/13/2013 220.03 19.57 30.27 30.27 17,862.00 100.00%
6/14/2013 219.24 20.90 32.33 32.33 17,862.00 100.00%
6/15/2013 218.39 21.22 32.83 32.83 17,862.00 100.00%
6/16/2013 217.47 21.23 32.84 32.84 17,862.00 100.00%
6/17/2013 216.83 19.02 29.42 29.42 17,862.00 100.00%
6/18/2013 216.59 20.62 31.90 31.90 17,862.00 100.00%
6/19/2013 216.48 19.40 30.01 30.01 17,862.00 100.00%
6/20/2013 216.37 20.30 31.40 31.40 17,862.00 100.00%
6/21/2013 216.30 22.54 34.87 34.87 17,862.00 100.00%
Page 4 of 9
TABLE A-1
Jordan Lake Water Supply Storage Allocation Tracking
Cary/Apex, Morrisville, and Wake County/RTP South COMBINED
Date
Reservoir
Level (ft)
Cary/Apex/
Morrisville/RTP
Water Supply
(mgd)
Cary/Apex/
Morrisville/RTP
Water Supply
(cfs)
Inflow to
Cary/Apex/
Morrisville/RTP
(cfs) 1
Cary/Apex/
Morrisville/RTP
Storage Level
(ac-ft)
Cary/Apex/
Morrisville/RTP
Storage Level
(%)
6/22/2013 216.28 21.07 32.60 32.60 17,862.00 100.00%
6/23/2013 216.24 22.45 34.73 34.73 17,862.00 100.00%
6/24/2013 216.20 19.08 29.52 29.52 17,862.00 100.00%
6/25/2013 216.19 23.61 36.52 36.52 17,862.00 100.00%
6/26/2013 216.25 22.17 34.30 34.30 17,862.00 100.00%
6/27/2013 216.32 20.52 31.74 31.74 17,862.00 100.00%
6/28/2013 216.48 23.06 35.67 35.67 17,862.00 100.00%
6/29/2013 216.96 17.82 27.57 27.57 17,862.00 100.00%
6/30/2013 218.36 20.31 31.42 31.42 17,862.00 100.00%
7/1/2013 220.34 16.64 25.74 25.74 17,862.00 100.00%
7/2/2013 221.01 18.24 28.22 28.22 17,862.00 100.00%
7/3/2013 221.65 19.64 30.38 30.38 17,862.00 100.00%
7/4/2013 222.57 18.84 29.15 29.15 17,862.00 100.00%
7/5/2013 222.48 17.98 27.82 27.82 17,862.00 100.00%
7/6/2013 221.91 20.36 31.50 31.50 17,862.00 100.00%
7/7/2013 221.20 20.22 31.28 31.28 17,862.00 100.00%
7/8/2013 220.81 20.52 31.74 31.74 17,862.00 100.00%
7/9/2013 220.57 20.96 32.43 32.43 17,862.00 100.00%
7/10/2013 219.95 21.44 33.17 33.17 17,862.00 100.00%
7/11/2013 220.15 19.03 29.44 29.44 17,862.00 100.00%
7/12/2013 220.49 18.51 28.63 28.63 17,862.00 100.00%
7/13/2013 220.11 18.46 28.56 28.56 17,862.00 100.00%
7/14/2013 219.36 18.20 28.16 28.16 17,862.00 100.00%
7/15/2013 218.71 18.04 27.91 27.91 17,862.00 100.00%
7/16/2013 217.85 20.45 31.64 31.64 17,862.00 100.00%
7/17/2013 216.94 22.84 35.33 35.33 17,862.00 100.00%
7/18/2013 216.28 21.74 33.63 33.63 17,862.00 100.00%
7/19/2013 215.96 21.21 32.81 32.81 17,862.00 100.00%
7/20/2013 215.95 23.04 35.64 35.64 17,862.00 100.00%
7/21/2013 215.95 22.10 34.19 34.19 17,862.00 100.00%
7/22/2013 215.96 20.74 32.08 32.08 17,862.00 100.00%
7/23/2013 216.08 20.72 32.05 32.05 17,862.00 100.00%
7/24/2013 216.06 24.43 37.79 37.79 17,862.00 100.00%
7/25/2013 216.11 22.95 35.50 35.50 17,862.00 100.00%
7/26/2013 216.15 25.06 38.77 38.77 17,862.00 100.00%
7/27/2013 216.15 23.05 35.66 35.66 17,862.00 100.00%
7/28/2013 216.19 18.74 28.99 28.99 17,862.00 100.00%
7/29/2013 216.29 22.39 34.64 34.64 17,862.00 100.00%
7/30/2013 216.25 22.43 34.70 34.70 17,862.00 100.00%
7/31/2013 216.08 21.46 33.20 33.20 17,862.00 100.00%
8/1/2013 216.32 21.17 32.75 32.75 17,862.00 100.00%
8/2/2013 216.42 19.79 30.62 30.62 17,862.00 100.00%
8/3/2013 216.24 20.74 32.08 32.08 17,862.00 100.00%
Page 5 of 9
TABLE A-1
Jordan Lake Water Supply Storage Allocation Tracking
Cary/Apex, Morrisville, and Wake County/RTP South COMBINED
Date
Reservoir
Level (ft)
Cary/Apex/
Morrisville/RTP
Water Supply
(mgd)
Cary/Apex/
Morrisville/RTP
Water Supply
(cfs)
Inflow to
Cary/Apex/
Morrisville/RTP
(cfs) 1
Cary/Apex/
Morrisville/RTP
Storage Level
(ac-ft)
Cary/Apex/
Morrisville/RTP
Storage Level
(%)
8/4/2013 215.98 18.74 28.99 28.99 17,862.00 100.00%
8/5/2013 215.88 19.85 30.71 30.71 17,862.00 100.00%
8/6/2013 215.92 20.20 31.25 31.25 17,862.00 100.00%
8/7/2013 215.98 20.74 32.08 32.08 17,862.00 100.00%
8/8/2013 216.03 22.74 35.18 35.18 17,862.00 100.00%
8/9/2013 216.03 23.50 36.35 36.35 17,862.00 100.00%
8/10/2013 216.02 20.76 32.12 32.12 17,862.00 100.00%
8/11/2013 216.06 21.48 33.23 33.23 17,862.00 100.00%
8/12/2013 216.11 20.19 31.23 31.23 17,862.00 100.00%
8/13/2013 216.22 20.35 31.48 31.48 17,862.00 100.00%
8/14/2013 216.27 22.08 34.16 34.16 17,862.00 100.00%
8/15/2013 216.18 21.50 33.26 33.26 17,862.00 100.00%
8/16/2013 216.11 20.35 31.48 31.48 17,862.00 100.00%
8/17/2013 216.10 20.47 31.67 31.67 17,862.00 100.00%
8/18/2013 216.27 18.54 28.68 28.68 17,862.00 100.00%
8/19/2013 216.71 20.38 31.53 31.53 17,862.00 100.00%
8/20/2013 216.88 18.43 28.51 28.51 17,862.00 100.00%
8/21/2013 216.89 18.69 28.91 28.91 17,862.00 100.00%
8/22/2013 217.19 20.90 32.33 32.33 17,862.00 100.00%
8/23/2013 216.89 20.66 31.96 31.96 17,862.00 100.00%
8/24/2013 216.39 21.53 33.31 33.31 17,862.00 100.00%
8/25/2013 216.03 21.43 33.15 33.15 17,862.00 100.00%
8/26/2013 216.02 20.65 31.95 31.95 17,862.00 100.00%
8/27/2013 216.00 24.01 37.14 37.14 17,862.00 100.00%
8/28/2013 215.96 24.85 38.44 38.44 17,862.00 100.00%
8/29/2013 215.99 22.07 34.14 34.14 17,862.00 100.00%
8/30/2013 215.96 22.43 34.70 34.70 17,862.00 100.00%
8/31/2013 215.93 23.15 35.81 35.81 17,862.00 100.00%
9/1/2013 215.94 20.67 31.98 31.98 17,862.00 100.00%
9/2/2013 216.19 17.02 26.33 26.33 17,862.00 100.00%
9/3/2013 216.41 21.70 33.57 33.57 17,862.00 100.00%
9/4/2013 216.42 21.14 32.70 32.70 17,862.00 100.00%
9/5/2013 216.39 21.63 33.46 33.46 17,862.00 100.00%
9/6/2013 216.35 21.56 33.35 33.35 17,862.00 100.00%
9/7/2013 216.28 21.36 33.04 33.04 17,862.00 100.00%
9/8/2013 216.24 22.17 34.30 34.30 17,862.00 100.00%
9/9/2013 216.17 22.03 34.08 34.08 17,862.00 100.00%
9/10/2013 216.12 22.73 35.16 35.16 17,862.00 100.00%
9/11/2013 216.09 25.05 38.75 38.75 17,862.00 100.00%
9/12/2013 216.04 23.89 36.96 29.83 17,862.00 100.00%
9/13/2013 216.00 21.77 33.68 33.68 17,862.00 100.00%
9/14/2013 215.88 22.61 34.98 (37.02) 17,719.19 99.20%
9/15/2013 215.81 23.51 36.37 6.62 17,660.17 98.87%
Page 6 of 9
TABLE A-1
Jordan Lake Water Supply Storage Allocation Tracking
Cary/Apex, Morrisville, and Wake County/RTP South COMBINED
Date
Reservoir
Level (ft)
Cary/Apex/
Morrisville/RTP
Water Supply
(mgd)
Cary/Apex/
Morrisville/RTP
Water Supply
(cfs)
Inflow to
Cary/Apex/
Morrisville/RTP
(cfs) 1
Cary/Apex/
Morrisville/RTP
Storage Level
(ac-ft)
Cary/Apex/
Morrisville/RTP
Storage Level
(%)
9/16/2013 215.82 20.46 31.65 126.61 17,848.53 99.92%
9/17/2013 215.67 21.17 32.75 (73.66) 17,637.47 98.74%
9/18/2013 215.59 22.58 34.93 (8.14) 17,552.03 98.26%
9/19/2013 215.54 22.58 34.93 23.66 17,529.68 98.14%
9/20/2013 215.48 20.94 32.39 14.63 17,494.45 97.94%
9/21/2013 215.58 18.99 29.38 214.68 17,862.00 100.00%
9/22/2013 215.56 18.62 28.81 28.81 17,862.00 100.00%
9/23/2013 215.59 19.43 30.06 30.06 17,862.00 100.00%
9/24/2013 215.61 19.37 29.97 29.97 17,862.00 100.00%
9/25/2013 215.61 21.41 33.12 33.12 17,862.00 100.00%
9/26/2013 215.59 22.38 34.62 34.62 17,862.00 100.00%
9/27/2013 215.55 22.72 35.15 17.46 17,826.91 99.80%
9/28/2013 215.50 19.98 30.91 9.68 17,784.81 99.57%
9/29/2013 215.45 22.97 35.53 25.94 17,765.78 99.46%
9/30/2013 215.40 19.86 30.72 24.69 17,753.81 99.39%
10/1/2013 215.35 22.09 34.17 25.86 17,737.32 99.30%
10/2/2013 215.30 23.96 37.07 26.47 17,716.31 99.18%
10/3/2013 215.24 23.14 35.80 18.80 17,682.61 99.00%
10/4/2013 215.18 23.52 36.39 25.58 17,661.17 98.88%
10/5/2013 215.11 23.08 35.70 4.98 17,600.24 98.53%
10/6/2013 215.06 23.15 35.81 44.97 17,618.41 98.64%
10/7/2013 215.17 18.39 28.45 151.26 17,862.00 100.00%
10/8/2013 215.18 18.50 28.62 28.62 17,862.00 100.00%
10/9/2013 215.27 18.88 29.21 29.21 17,862.00 100.00%
10/10/2013 215.26 18.77 29.04 29.04 17,862.00 100.00%
10/11/2013 215.27 18.91 29.25 29.25 17,862.00 100.00%
10/12/2013 215.30 19.32 29.89 29.89 17,862.00 100.00%
10/13/2013 215.33 17.72 27.41 27.41 17,862.00 100.00%
10/14/2013 215.26 17.58 27.20 (19.72) 17,768.94 99.48%
10/15/2013 215.25 19.11 29.56 59.81 17,828.94 99.81%
10/16/2013 215.22 19.02 29.42 46.09 17,862.00 100.00%
10/17/2013 215.17 18.99 29.38 14.56 17,832.60 99.84%
10/18/2013 215.15 20.43 31.61 46.43 17,862.00 100.00%
10/19/2013 215.11 19.40 30.01 30.01 17,862.00 100.00%
10/20/2013 215.08 18.18 28.12 28.12 17,862.00 100.00%
10/21/2013 215.04 18.72 28.96 28.96 17,862.00 100.00%
10/22/2013 214.89 18.92 29.27 (76.46) 17,652.29 98.83%
10/23/2013 214.85 19.58 30.29 16.54 17,625.01 98.67%
10/24/2013 214.80 19.90 30.79 8.14 17,580.10 98.42%
10/25/2013 214.74 18.86 29.18 0.51 17,523.24 98.10%
10/26/2013 214.69 18.45 28.54 11.83 17,490.09 97.92%
10/27/2013 214.64 18.56 28.71 11.83 17,456.61 97.73%
10/28/2013 214.60 18.94 29.30 20.35 17,438.87 97.63%
Page 7 of 9
TABLE A-1
Jordan Lake Water Supply Storage Allocation Tracking
Cary/Apex, Morrisville, and Wake County/RTP South COMBINED
Date
Reservoir
Level (ft)
Cary/Apex/
Morrisville/RTP
Water Supply
(mgd)
Cary/Apex/
Morrisville/RTP
Water Supply
(cfs)
Inflow to
Cary/Apex/
Morrisville/RTP
(cfs) 1
Cary/Apex/
Morrisville/RTP
Storage Level
(ac-ft)
Cary/Apex/
Morrisville/RTP
Storage Level
(%)
10/29/2013 214.56 19.75 30.55 37.72 17,453.09 97.71%
10/30/2013 214.51 18.54 28.68 27.00 17,449.75 97.69%
10/31/2013 214.44 20.31 31.42 (4.58) 17,378.34 97.29%
11/1/2013 214.51 18.41 28.48 257.46 17,832.53 99.84%
11/2/2013 214.48 16.80 25.99 40.85 17,862.00 100.00%
11/3/2013 214.47 17.70 27.38 27.38 17,862.00 100.00%
11/4/2013 214.44 17.67 27.34 27.34 17,862.00 100.00%
11/5/2013 214.39 17.63 27.27 7.32 17,822.43 99.78%
11/6/2013 214.34 17.38 26.89 7.04 17,783.06 99.56%
11/7/2013 214.32 18.95 29.32 67.39 17,858.58 99.98%
11/8/2013 214.26 18.23 28.20 (5.09) 17,792.55 99.61%
11/9/2013 214.20 17.31 26.78 (5.22) 17,729.09 99.26%
11/10/2013 214.21 17.07 26.41 93.42 17,862.00 100.00%
11/11/2013 214.12 17.90 27.69 (30.02) 17,747.52 99.36%
11/12/2013 214.12 18.77 29.04 64.99 17,818.84 99.76%
11/13/2013 214.03 16.83 26.04 (30.41) 17,706.89 99.13%
11/14/2013 213.98 16.97 26.25 5.22 17,665.17 98.90%
11/15/2013 213.96 17.06 26.39 42.88 17,697.87 99.08%
11/16/2013 213.93 16.88 26.11 58.11 17,761.34 99.44%
11/17/2013 213.86 17.01 26.31 (7.25) 17,694.76 99.06%
11/18/2013 213.89 16.80 25.99 110.30 17,862.00 100.00%
11/19/2013 213.83 17.11 26.47 1.76 17,812.99 99.73%
11/20/2013 213.78 16.39 25.36 11.49 17,785.48 99.57%
11/21/2013 213.76 16.19 25.05 57.36 17,849.58 99.93%
11/22/2013 213.75 16.88 26.11 32.37 17,862.00 100.00%
11/23/2013 213.74 16.48 25.49 25.49 17,862.00 100.00%
11/24/2013 213.65 16.77 25.94 (27.86) 17,755.28 99.40%
11/25/2013 213.62 17.18 26.58 20.23 17,742.69 99.33%
11/26/2013 213.75 16.86 26.08 86.24 17,862.00 100.00%
11/27/2013 214.00 14.88 23.02 23.02 17,862.00 100.00%
11/28/2013 214.38 16.12 24.94 24.94 17,862.00 100.00%
11/29/2013 214.55 15.90 24.60 24.60 17,862.00 100.00%
11/30/2013 214.61 14.98 23.17 23.17 17,862.00 100.00%
12/1/2013 214.65 15.29 23.65 23.65 17,862.00 100.00%
12/2/2013 214.68 15.77 24.40 24.40 17,862.00 100.00%
12/3/2013 214.70 17.06 26.39 26.39 17,862.00 100.00%
12/4/2013 214.70 17.09 26.44 26.44 17,862.00 100.00%
12/5/2013 214.70 17.01 26.31 26.31 17,862.00 100.00%
12/6/2013 214.72 15.30 23.67 23.67 17,862.00 100.00%
12/7/2013 214.78 15.42 23.85 23.85 17,862.00 100.00%
12/8/2013 214.82 16.07 24.86 24.86 17,862.00 100.00%
12/9/2013 214.89 16.15 24.98 24.98 17,862.00 100.00%
12/10/2013 215.04 16.75 25.91 25.91 17,862.00 100.00%
Page 8 of 9
TABLE A-1
Jordan Lake Water Supply Storage Allocation Tracking
Cary/Apex, Morrisville, and Wake County/RTP South COMBINED
Date
Reservoir
Level (ft)
Cary/Apex/
Morrisville/RTP
Water Supply
(mgd)
Cary/Apex/
Morrisville/RTP
Water Supply
(cfs)
Inflow to
Cary/Apex/
Morrisville/RTP
(cfs) 1
Cary/Apex/
Morrisville/RTP
Storage Level
(ac-ft)
Cary/Apex/
Morrisville/RTP
Storage Level
(%)
12/11/2013 215.38 15.65 24.21 24.21 17,862.00 100.00%
12/12/2013 215.56 16.14 24.97 24.97 17,862.00 100.00%
12/13/2013 215.67 16.25 25.14 25.14 17,862.00 100.00%
12/14/2013 215.87 15.85 24.52 24.52 17,862.00 100.00%
12/15/2013 216.33 15.98 24.72 24.72 17,862.00 100.00%
12/16/2013 216.76 16.04 24.81 24.81 17,862.00 100.00%
12/17/2013 216.80 16.40 25.37 25.37 17,862.00 100.00%
12/18/2013 216.82 15.98 24.72 24.72 17,862.00 100.00%
12/19/2013 216.80 17.10 26.45 26.45 17,862.00 100.00%
12/20/2013 216.73 17.54 27.13 27.13 17,862.00 100.00%
12/21/2013 216.60 16.29 25.20 25.20 17,862.00 100.00%
12/22/2013 216.47 15.94 24.66 24.66 17,862.00 100.00%
12/23/2013 217.12 16.14 24.97 24.97 17,862.00 100.00%
12/24/2013 218.35 16.04 24.81 24.81 17,862.00 100.00%
12/25/2013 218.69 15.15 23.44 23.44 17,862.00 100.00%
12/26/2013 218.69 14.84 22.96 22.96 17,862.00 100.00%
12/27/2013 218.29 15.05 23.28 23.28 17,862.00 100.00%
12/28/2013 218.04 14.66 22.68 22.68 17,862.00 100.00%
12/29/2013 219.20 14.84 22.96 22.96 17,862.00 100.00%
12/30/2013 220.52 15.21 23.53 23.53 17,862.00 100.00%
12/31/2013 220.31 16.68 25.80 25.80 17,862.00 100.00%
Page 9 of 9
This page has been intentionally left blank. 

2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
B-1

Appendix B
Daily Interbasin Transfer Estimates for 2013

This page has been intentionally left blank. 

(3) (4) (5) (7)=3+4+5 (8) (9) (10) (11) (12) (13)
L=8+9+10
+11+12+1
3 (14) (15) (17) (16)
(18)=8+9+
14+15
R=10+11+
17
19=12+13
+16
T=18+R+
19 (21)=18-3 (22)=R
(23)=19-4-
5 (24)=22 (25)=23
Water Withdrawal/Purchase (mgd) Consumptive Use (mgd) Water Use Discharged as Wastewater (mgd) Total Returned/Used in Each Basin (mgd) Net Basin Gain(+)/Loss(-) (mgd)
Interbasin Transfer
(mgd)
Jordan Lake
Withdrawal
Neuse Basin
Purchase
Total
System
Use Haw Cape Fear Neuse Total Haw Cape Fear Neuse Haw Cape Fear Neuse
Total- All
Basins Haw Cape Fear Neuse
Haw to
Cape Fear
Haw to
Neuse
DATE Haw Raleigh Durham Potable
WRF
Reuse Potable
WRF
Reuse Potable
WRF
Reuse
WTP
Process
Water WRF WRF
Total
WRFs
1/1/2013 16.12 0.00 0.00 16.12 0.20 0.00 0.01 0.00 0.47 0.69 1.36 2.78 1.72 0.00 10.26 4.70 0.01 11.41 16.12 -11.42 0.01 11.41 0.01 11.41
1/2/2013 16.07 0.00 0.00 16.07 0.25 0.00 0.01 0.00 0.62 0.77 1.65 1.82 1.65 0.00 10.96 3.72 0.01 12.34 16.07 -12.35 0.01 12.34 0.01 12.34
1/3/2013 17.39 0.00 0.00 17.39 0.23 0.00 0.01 0.00 0.55 0.67 1.45 3.42 1.77 0.00 10.76 5.41 0.01 11.97 17.39 -11.98 0.01 11.97 0.01 11.97
1/4/2013 16.76 0.00 0.00 16.76 0.25 0.00 0.01 0.00 0.61 0.69 1.56 2.42 1.58 0.00 11.19 4.26 0.01 12.50 16.76 -12.50 0.01 12.50 0.01 12.50
1/5/2013 15.82 0.00 0.00 15.82 0.22 0.00 0.01 0.00 0.52 0.67 1.42 2.11 1.60 0.00 10.70 3.92 0.01 11.89 15.82 -11.90 0.01 11.89 0.01 11.89
1/6/2013 15.85 0.00 0.00 15.85 0.25 0.00 0.00 0.00 0.61 0.68 1.54 1.78 1.53 0.00 11.00 3.56 0.00 12.29 15.85 -12.29 0.00 12.29 0.00 12.29
1/7/2013 16.02 0.00 0.00 16.02 0.24 0.00 0.01 0.00 0.57 0.71 1.52 1.88 1.54 0.00 11.08 3.66 0.01 12.35 16.02 -12.36 0.01 12.35 0.01 12.35
1/8/2013 15.72 0.00 0.00 15.72 0.20 0.00 0.01 0.00 0.49 0.72 1.42 2.30 1.42 0.00 10.58 3.93 0.01 11.79 15.72 -11.79 0.01 11.79 0.01 11.79
1/9/2013 15.69 0.00 0.00 15.69 0.25 0.00 0.01 0.00 0.59 0.80 1.64 1.41 1.64 0.00 11.00 3.29 0.01 12.39 15.69 -12.40 0.01 12.39 0.01 12.39
1/10/2013 16.77 0.00 0.00 16.77 0.24 0.00 0.01 0.00 0.58 0.74 1.57 2.59 1.77 0.00 10.84 4.60 0.01 12.16 16.77 -12.17 0.01 12.16 0.01 12.16
1/11/2013 15.48 0.00 0.00 15.48 0.20 0.00 0.01 0.00 0.49 0.72 1.42 2.23 1.62 0.00 10.21 4.05 0.01 11.42 15.48 -11.43 0.01 11.42 0.01 11.42
1/12/2013 14.46 0.00 0.00 14.46 0.20 0.00 0.01 0.00 0.47 0.81 1.48 1.19 1.74 0.00 10.04 3.13 0.01 11.33 14.46 -11.33 0.01 11.33 0.01 11.33
1/13/2013 16.71 0.00 0.00 16.71 0.26 0.00 0.01 0.00 0.64 0.71 1.62 2.15 1.91 0.00 11.03 4.33 0.01 12.38 16.71 -12.38 0.01 12.38 0.01 12.38
1/14/2013 16.64 0.00 0.00 16.64 0.25 0.00 0.01 0.00 0.61 0.73 1.61 2.28 1.82 0.00 10.93 4.35 0.01 12.28 16.64 -12.29 0.01 12.28 0.01 12.28
1/15/2013 16.24 0.00 0.00 16.24 0.28 0.00 0.01 0.00 0.64 0.82 1.74 1.54 1.60 0.00 11.35 3.42 0.01 12.81 16.24 -12.82 0.01 12.81 0.01 12.81
1/16/2013 15.74 0.00 0.00 15.74 0.18 0.00 0.00 0.00 0.44 0.69 1.31 3.30 1.40 0.00 9.73 4.88 0.00 10.85 15.74 -10.86 0.00 10.85 0.00 10.85
1/17/2013 14.78 0.00 0.00 14.78 0.26 0.00 0.01 0.00 0.62 0.68 1.57 0.44 1.65 0.00 11.13 2.35 0.01 12.43 14.78 -12.43 0.01 12.43 0.01 12.43
1/18/2013 15.63 0.00 0.00 15.63 0.19 0.00 0.01 0.00 0.45 0.81 1.46 2.74 1.41 0.00 10.02 4.34 0.01 11.28 15.63 -11.29 0.01 11.28 0.01 11.28
1/19/2013 15.88 0.00 0.00 15.88 0.23 0.00 0.01 0.00 0.56 0.69 1.48 2.00 1.57 0.00 10.83 3.80 0.01 12.08 15.88 -12.08 0.01 12.08 0.01 12.08
1/20/2013 15.77 0.00 0.00 15.77 0.25 0.00 0.01 0.00 0.60 0.70 1.55 1.59 1.74 0.00 10.88 3.58 0.01 12.18 15.77 -12.19 0.01 12.18 0.01 12.18
1/21/2013 15.09 0.00 0.00 15.09 0.22 0.00 0.01 0.00 0.54 0.71 1.47 1.49 1.50 0.00 10.63 3.21 0.01 11.88 15.09 -11.88 0.01 11.88 0.01 11.88
1/22/2013 16.43 0.00 0.00 16.43 0.23 0.00 0.01 0.00 0.57 0.78 1.59 2.60 1.60 0.00 10.65 4.43 0.01 11.99 16.43 -12.00 0.01 11.99 0.01 11.99
1/23/2013 15.78 0.00 0.00 15.78 0.23 0.00 0.01 0.00 0.57 0.69 1.49 1.72 1.69 0.00 10.87 3.64 0.01 12.13 15.78 -12.14 0.01 12.13 0.01 12.13
1/24/2013 15.87 0.00 0.00 15.87 0.22 0.00 0.01 0.00 0.54 0.66 1.43 2.31 1.65 0.00 10.47 4.19 0.01 11.68 15.87 -11.68 0.01 11.68 0.01 11.68
1/25/2013 15.98 0.00 0.00 15.98 0.23 0.00 0.00 0.00 0.56 0.60 1.39 2.40 1.46 0.00 10.73 4.09 0.00 11.89 15.98 -11.89 0.00 11.89 0.00 11.89
1/26/2013 14.70 0.00 0.00 14.70 0.21 0.00 0.01 0.00 0.52 0.65 1.39 1.13 1.45 0.00 10.73 2.79 0.01 11.90 14.70 -11.91 0.01 11.90 0.01 11.90
1/27/2013 14.91 0.00 0.00 14.91 0.20 0.00 0.01 0.00 0.49 0.65 1.35 1.50 1.54 0.00 10.52 3.25 0.01 11.66 14.91 -11.66 0.01 11.66 0.01 11.66
1/28/2013 16.30 0.00 0.00 16.30 0.27 0.00 0.01 0.00 0.67 0.68 1.63 1.47 1.88 0.00 11.32 3.63 0.01 12.66 16.30 -12.67 0.01 12.66 0.01 12.66
1/29/2013 15.37 0.00 1.71 17.08 0.25 0.00 0.01 0.00 0.61 0.75 1.61 2.64 1.78 0.00 11.06 4.67 0.01 12.41 17.08 -10.70 0.01 10.70 0.01 10.70
1/30/2013 14.92 0.00 2.26 17.18 0.27 0.00 0.01 0.00 0.66 0.79 1.73 2.62 1.57 0.00 11.26 4.46 0.01 12.71 17.18 -10.46 0.01 10.45 0.01 10.45
1/31/2013 14.50 0.00 1.79 16.29 0.27 0.00 0.01 0.00 0.64 0.76 1.68 1.49 1.62 0.00 11.50 3.37 0.01 12.91 16.29 -11.13 0.01 11.12 0.01 11.12
2/1/2013 14.40 0.00 0.75 15.15 0.25 0.00 0.01 0.00 0.62 0.77 1.65 1.83 1.49 0.00 10.18 3.57 0.01 11.56 15.15 -10.83 0.01 10.82 0.01 10.82
2/2/2013 14.78 0.00 0.00 14.78 0.26 0.00 0.01 0.00 0.62 0.80 1.68 1.85 1.61 0.00 9.63 3.72 0.01 11.06 14.78 -11.06 0.01 11.06 0.01 11.06
2/3/2013 14.82 0.00 0.00 14.82 0.26 0.00 0.01 0.00 0.63 0.81 1.70 1.59 1.68 0.00 9.85 3.53 0.01 11.29 14.82 -11.29 0.01 11.29 0.01 11.29
2/4/2013 16.74 0.00 0.00 16.74 0.35 0.00 0.01 0.00 0.86 0.62 1.84 2.00 1.73 0.00 11.17 4.08 0.01 12.66 16.74 -12.66 0.01 12.66 0.01 12.66
2/5/2013 16.66 0.00 0.00 16.66 0.30 0.00 0.01 0.00 0.73 0.55 1.58 2.89 1.50 0.00 10.69 4.69 0.01 11.97 16.66 -11.97 0.01 11.97 0.01 11.97
2/6/2013 14.83 0.00 0.00 14.83 0.27 0.00 0.01 0.00 0.66 0.54 1.48 1.23 1.45 0.00 10.66 2.96 0.01 11.87 14.83 -11.87 0.01 11.87 0.01 11.87
2/7/2013 16.05 0.00 0.00 16.05 0.30 0.00 0.01 0.00 0.73 0.54 1.57 2.04 1.43 0.00 11.01 3.77 0.01 12.27 16.05 -12.28 0.01 12.27 0.01 12.27
2/8/2013 16.77 0.00 0.00 16.77 0.30 0.00 0.01 0.00 0.72 0.55 1.57 3.15 1.31 0.00 10.74 4.76 0.01 12.01 16.77 -12.01 0.01 12.01 0.01 12.01
2/9/2013 16.63 0.00 0.00 16.63 0.33 0.00 0.01 0.00 0.79 0.54 1.67 1.87 1.58 0.00 11.51 3.77 0.01 12.85 16.63 -12.86 0.01 12.85 0.01 12.85
2/10/2013 15.89 0.00 0.00 15.89 0.26 0.00 0.01 0.00 0.64 0.55 1.46 2.72 1.68 0.00 10.04 4.66 0.01 11.23 15.89 -11.23 0.01 11.23 0.01 11.23
2/11/2013 16.30 0.00 0.00 16.30 0.33 0.00 0.01 0.00 0.80 0.93 2.07 1.89 1.65 0.00 10.68 3.87 0.01 12.42 16.30 -12.43 0.01 12.42 0.01 12.42
Page 1 of 9
(3) (4) (5) (7)=3+4+5 (8) (9) (10) (11) (12) (13)
L=8+9+10
+11+12+1
3 (14) (15) (17) (16)
(18)=8+9+
14+15
R=10+11+
17
19=12+13
+16
T=18+R+
19 (21)=18-3 (22)=R
(23)=19-4-
5 (24)=22 (25)=23
Water Withdrawal/Purchase (mgd) Consumptive Use (mgd) Water Use Discharged as Wastewater (mgd) Total Returned/Used in Each Basin (mgd) Net Basin Gain(+)/Loss(-) (mgd)
Interbasin Transfer
(mgd)
Jordan Lake
Withdrawal
Neuse Basin
Purchase
Total
System
Use Haw Cape Fear Neuse Total Haw Cape Fear Neuse Haw Cape Fear Neuse
Total- All
Basins Haw Cape Fear Neuse
Haw to
Cape Fear
Haw to
Neuse
DATE Haw Raleigh Durham Potable
WRF
Reuse Potable
WRF
Reuse Potable
WRF
Reuse
WTP
Process
Water WRF WRF
Total
WRFs
2/12/2013 16.03 0.00 0.00 16.03 0.30 0.00 0.01 0.00 0.72 0.42 1.44 2.30 1.57 0.00 10.71 4.17 0.01 11.85 16.03 -11.86 0.01 11.85 0.01 11.85
2/13/2013 15.79 0.00 0.00 15.79 0.35 0.00 0.01 0.00 0.85 0.36 1.56 1.15 1.84 0.00 11.24 3.33 0.01 12.45 15.79 -12.46 0.01 12.45 0.01 12.45
2/14/2013 15.59 0.00 0.00 15.59 0.28 0.00 0.01 0.00 0.68 0.35 1.31 2.04 1.55 0.00 10.68 3.87 0.01 11.71 15.59 -11.72 0.01 11.71 0.01 11.71
2/15/2013 16.07 0.00 0.00 16.07 0.27 0.00 0.01 0.00 0.66 0.34 1.27 2.92 1.69 0.00 10.19 4.88 0.01 11.19 16.07 -11.19 0.01 11.19 0.01 11.19
2/16/2013 14.97 0.00 0.00 14.97 0.24 0.00 0.01 0.00 0.59 0.33 1.17 2.05 1.55 0.00 10.21 3.84 0.01 11.12 14.97 -11.13 0.01 11.12 0.01 11.12
2/17/2013 14.79 0.00 0.00 14.79 0.30 0.00 0.00 0.00 0.73 0.32 1.35 1.14 1.71 0.00 10.59 3.15 0.00 11.64 14.79 -11.64 0.00 11.64 0.00 11.64
2/18/2013 17.82 0.00 0.00 17.82 0.35 0.00 0.01 0.00 0.86 0.83 2.05 2.80 1.64 0.00 11.33 4.79 0.01 13.02 17.82 -13.03 0.01 13.02 0.01 13.02
2/19/2013 16.19 0.00 0.00 16.19 0.31 0.00 0.01 0.00 0.76 0.80 1.88 2.15 1.69 0.00 10.47 4.15 0.01 12.03 16.19 -12.04 0.01 12.03 0.01 12.03
2/20/2013 15.83 0.00 0.00 15.83 0.25 0.00 0.01 0.00 0.61 0.73 1.60 2.91 1.57 0.00 9.75 4.74 0.01 11.09 15.83 -11.09 0.01 11.09 0.01 11.09
2/21/2013 15.96 0.00 0.00 15.96 0.31 0.00 0.01 0.00 0.76 0.64 1.71 1.73 1.61 0.00 10.91 3.65 0.01 12.30 15.96 -12.31 0.01 12.30 0.01 12.30
2/22/2013 15.70 0.00 0.00 15.70 0.25 0.00 0.01 0.00 0.60 0.61 1.46 2.75 1.31 0.00 10.17 4.31 0.01 11.38 15.70 -11.39 0.01 11.38 0.01 11.38
2/23/2013 15.35 0.00 0.00 15.35 0.28 0.00 0.01 0.00 0.68 0.62 1.60 1.74 1.34 0.00 10.68 3.36 0.01 11.98 15.35 -11.99 0.01 11.98 0.01 11.98
2/24/2013 15.61 0.00 0.00 15.61 0.29 0.00 0.01 0.00 0.69 0.64 1.62 1.86 1.57 0.00 10.56 3.72 0.01 11.89 15.61 -11.89 0.01 11.89 0.01 11.89
2/25/2013 16.39 0.00 0.00 16.39 0.31 0.00 0.01 0.00 0.76 0.64 1.72 2.28 1.61 0.00 10.78 4.20 0.01 12.18 16.39 -12.19 0.01 12.18 0.01 12.18
2/26/2013 16.00 0.00 0.00 16.00 0.28 0.00 0.01 0.00 0.69 0.66 1.63 2.52 1.30 0.00 10.55 4.10 0.01 11.89 16.00 -11.90 0.01 11.89 0.01 11.89
2/27/2013 15.72 0.00 0.00 15.72 0.29 0.00 0.01 0.00 0.71 0.67 1.67 1.99 1.41 0.00 10.65 3.69 0.01 12.03 15.72 -12.03 0.01 12.03 0.01 12.03
2/28/2013 15.30 0.00 0.00 15.30 0.29 0.00 0.01 0.00 0.70 0.68 1.69 1.43 1.62 0.00 10.57 3.34 0.01 11.95 15.30 -11.96 0.01 11.95 0.01 11.95
3/1/2013 18.41 0.00 0.00 18.41 0.29 0.00 0.01 0.00 0.71 0.69 1.71 2.82 1.88 0.00 12.01 4.99 0.01 13.41 18.41 -13.42 0.01 13.41 0.01 13.41
3/2/2013 15.66 0.00 0.00 15.66 0.24 0.00 0.00 0.00 0.57 0.67 1.48 1.79 1.63 0.00 10.76 3.65 0.00 12.01 15.66 -12.01 0.00 12.01 0.00 12.01
3/3/2013 15.64 0.00 0.00 15.64 0.21 0.00 0.01 0.00 0.49 0.71 1.42 1.83 1.67 0.00 10.72 3.71 0.01 11.93 15.64 -11.93 0.01 11.93 0.01 11.93
3/4/2013 17.73 0.00 0.00 17.73 0.23 0.00 0.01 0.00 0.54 0.72 1.49 3.31 1.75 0.00 11.18 5.29 0.01 12.44 17.73 -12.44 0.01 12.44 0.01 12.44
3/5/2013 17.41 0.00 0.00 17.41 0.27 0.00 0.01 0.00 0.64 0.67 1.59 2.14 1.69 0.00 12.00 4.09 0.01 13.31 17.41 -13.32 0.01 13.31 0.01 13.31
3/6/2013 18.31 0.00 0.00 18.31 0.29 0.00 0.01 0.00 0.71 0.72 1.73 2.90 1.87 0.00 11.81 5.06 0.01 13.24 18.31 -13.25 0.01 13.24 0.01 13.24
3/7/2013 19.64 0.00 0.00 19.64 0.33 0.00 0.01 0.00 0.81 0.72 1.86 3.31 1.91 0.00 12.55 5.56 0.01 14.08 19.64 -14.08 0.01 14.08 0.01 14.08
3/8/2013 18.07 0.00 0.00 18.07 0.28 0.00 0.01 0.00 0.69 0.72 1.69 3.05 1.75 0.00 11.58 5.08 0.01 12.98 18.07 -12.99 0.01 12.98 0.01 12.98
3/9/2013 15.99 0.00 0.00 15.99 0.20 0.00 0.01 0.00 0.46 0.72 1.38 2.70 1.58 0.00 10.33 4.47 0.01 11.51 15.99 -11.52 0.01 11.51 0.01 11.51
3/10/2013 16.19 0.00 0.00 16.19 0.25 0.00 0.01 0.00 0.60 0.69 1.55 1.59 1.78 0.00 11.27 3.62 0.01 12.57 16.19 -12.57 0.01 12.57 0.01 12.57
3/11/2013 18.55 0.00 0.00 18.55 0.28 0.00 0.01 0.00 0.69 0.72 1.70 3.17 1.85 0.00 11.83 5.30 0.01 13.24 18.55 -13.25 0.01 13.24 0.01 13.24
3/12/2013 18.24 0.00 0.00 18.24 0.28 0.00 0.01 0.00 0.68 0.69 1.67 2.67 1.77 0.00 12.13 4.73 0.01 13.51 18.24 -13.51 0.01 13.51 0.01 13.51
3/13/2013 19.46 0.00 0.00 19.46 0.36 0.00 0.01 0.00 0.87 0.72 1.95 2.44 2.08 0.00 12.98 4.88 0.01 14.57 19.46 -14.58 0.01 14.57 0.01 14.57
3/14/2013 18.38 0.00 0.00 18.38 0.32 0.00 0.01 0.00 0.79 0.68 1.80 1.90 2.14 0.00 12.54 4.36 0.01 14.01 18.38 -14.02 0.01 14.01 0.01 14.01
3/15/2013 16.39 0.00 0.00 16.39 0.20 0.00 0.01 0.00 0.45 0.66 1.32 3.22 1.61 0.00 10.23 5.03 0.01 11.35 16.39 -11.36 0.01 11.35 0.01 11.35
3/16/2013 16.25 0.00 0.00 16.25 0.23 0.00 0.01 0.00 0.55 0.68 1.46 2.20 1.74 0.00 10.85 4.16 0.01 12.08 16.25 -12.09 0.01 12.08 0.01 12.08
3/17/2013 16.04 0.00 0.00 16.04 0.21 0.00 0.01 0.00 0.50 0.71 1.43 2.27 1.65 0.00 10.69 4.13 0.01 11.90 16.04 -11.91 0.01 11.90 0.01 11.90
3/18/2013 18.21 0.00 0.00 18.21 0.34 0.00 0.01 0.00 0.82 0.77 1.94 1.49 1.94 0.00 12.84 3.77 0.01 14.43 18.21 -14.44 0.01 14.43 0.01 14.43
3/19/2013 18.21 0.00 0.00 18.21 0.47 0.00 0.03 0.00 0.66 0.75 1.91 3.32 1.66 0.00 11.32 5.45 0.03 12.73 18.21 -12.76 0.03 12.73 0.03 12.73
3/20/2013 17.63 0.00 0.00 17.63 0.29 0.00 0.01 0.00 0.70 0.76 1.76 1.99 1.75 0.00 12.13 4.03 0.01 13.60 17.63 -13.60 0.01 13.60 0.01 13.60
3/21/2013 16.97 0.00 0.00 16.97 0.34 0.00 0.01 0.00 0.60 0.71 1.67 2.43 1.72 0.00 11.16 4.48 0.01 12.47 16.97 -12.49 0.01 12.47 0.01 12.47
3/22/2013 19.36 0.00 0.00 19.36 0.28 0.00 0.01 0.00 0.68 0.71 1.68 4.03 1.81 0.00 11.84 6.12 0.01 13.24 19.36 -13.24 0.01 13.24 0.01 13.24
3/23/2013 16.88 0.00 0.00 16.88 0.22 0.00 0.01 0.00 0.54 0.69 1.46 2.82 1.67 0.00 10.93 4.71 0.01 12.16 16.88 -12.17 0.01 12.16 0.01 12.16
3/24/2013 16.64 0.00 0.00 16.64 0.25 0.00 0.01 0.00 0.62 0.68 1.56 2.01 1.65 0.00 11.41 3.92 0.01 12.72 16.64 -12.72 0.01 12.72 0.01 12.72
3/25/2013 16.93 0.00 0.00 16.93 0.24 0.00 0.01 0.00 0.57 0.68 1.50 2.37 1.88 0.00 11.18 4.49 0.01 12.43 16.93 -12.44 0.01 12.43 0.01 12.43
Page 2 of 9
(3) (4) (5) (7)=3+4+5 (8) (9) (10) (11) (12) (13)
L=8+9+10
+11+12+1
3 (14) (15) (17) (16)
(18)=8+9+
14+15
R=10+11+
17
19=12+13
+16
T=18+R+
19 (21)=18-3 (22)=R
(23)=19-4-
5 (24)=22 (25)=23
Water Withdrawal/Purchase (mgd) Consumptive Use (mgd) Water Use Discharged as Wastewater (mgd) Total Returned/Used in Each Basin (mgd) Net Basin Gain(+)/Loss(-) (mgd)
Interbasin Transfer
(mgd)
Jordan Lake
Withdrawal
Neuse Basin
Purchase
Total
System
Use Haw Cape Fear Neuse Total Haw Cape Fear Neuse Haw Cape Fear Neuse
Total- All
Basins Haw Cape Fear Neuse
Haw to
Cape Fear
Haw to
Neuse
DATE Haw Raleigh Durham Potable
WRF
Reuse Potable
WRF
Reuse Potable
WRF
Reuse
WTP
Process
Water WRF WRF
Total
WRFs
3/26/2013 18.73 0.00 0.00 18.73 0.26 0.00 0.01 0.00 0.63 0.68 1.58 3.91 1.86 0.00 11.38 6.03 0.01 12.70 18.73 -12.70 0.01 12.70 0.01 12.70
3/27/2013 17.59 0.72 0.00 18.31 0.32 0.00 0.01 0.00 0.77 0.69 1.79 2.14 1.98 0.00 12.40 4.44 0.01 13.86 18.31 -13.15 0.01 13.15 0.01 13.15
3/28/2013 17.81 0.00 0.00 17.81 0.28 0.00 0.01 0.00 0.68 0.69 1.66 2.42 1.85 0.00 11.88 4.55 0.01 13.25 17.81 -13.26 0.01 13.25 0.01 13.25
3/29/2013 17.07 0.00 0.00 17.07 0.23 0.00 0.01 0.00 0.55 0.68 1.46 2.84 1.74 0.00 11.03 4.81 0.01 12.26 17.07 -12.26 0.01 12.26 0.01 12.26
3/30/2013 16.09 0.00 0.00 16.09 0.22 0.00 0.01 0.00 0.52 0.68 1.43 2.37 1.77 0.00 10.52 4.36 0.01 11.73 16.09 -11.73 0.01 11.73 0.01 11.73
3/31/2013 16.63 0.00 0.00 16.63 0.21 0.00 0.01 0.00 0.51 0.69 1.43 2.83 1.75 0.00 10.62 4.79 0.01 11.83 16.63 -11.84 0.01 11.83 0.01 11.83
4/1/2013 18.52 0.00 0.00 18.52 0.31 0.00 0.01 0.00 0.74 0.70 1.76 3.60 1.90 0.00 11.27 5.81 0.01 12.71 18.52 -12.71 0.01 12.71 0.01 12.71
4/2/2013 15.69 0.00 0.00 15.69 0.22 0.00 0.01 0.00 0.54 0.71 1.48 2.50 1.49 0.00 10.22 4.21 0.01 11.47 15.69 -11.48 0.01 11.47 0.01 11.47
4/3/2013 16.18 0.00 0.00 16.18 0.25 0.00 0.01 0.00 0.60 0.73 1.58 2.35 1.63 0.00 10.62 4.23 0.01 11.95 16.18 -11.95 0.01 11.95 0.01 11.95
4/4/2013 16.97 0.00 0.00 16.97 0.24 0.00 0.01 0.00 0.59 0.68 1.52 3.15 1.46 0.00 10.85 4.85 0.01 12.12 16.97 -12.12 0.01 12.12 0.01 12.12
4/5/2013 15.97 0.00 0.00 15.97 0.23 0.00 0.01 0.00 0.57 0.61 1.42 2.34 1.59 0.00 10.62 4.16 0.01 11.80 15.97 -11.81 0.01 11.80 0.01 11.80
4/6/2013 16.87 0.00 0.00 16.87 0.24 0.00 0.01 0.00 0.58 0.68 1.50 3.03 1.65 0.00 10.69 4.92 0.01 11.95 16.87 -11.95 0.01 11.95 0.01 11.95
4/7/2013 16.87 0.00 0.00 16.87 0.24 0.00 0.01 0.00 0.59 0.73 1.57 2.65 1.78 0.00 10.88 4.67 0.01 12.19 16.87 -12.20 0.01 12.19 0.01 12.19
4/8/2013 17.40 0.00 0.00 17.40 0.28 0.00 0.01 0.00 0.68 0.75 1.71 2.81 1.75 0.00 11.13 4.84 0.01 12.56 17.40 -12.56 0.01 12.56 0.01 12.56
4/9/2013 17.60 0.00 0.00 17.60 0.28 0.00 0.01 0.00 0.68 0.76 1.72 2.91 1.81 0.00 11.16 5.00 0.01 12.59 17.60 -12.60 0.01 12.59 0.01 12.59
4/10/2013 18.83 0.00 0.00 18.83 0.36 0.00 0.01 0.00 0.88 0.86 2.11 2.49 1.96 0.00 12.28 4.81 0.01 14.02 18.83 -14.02 0.01 14.02 0.01 14.02
4/11/2013 18.35 0.00 0.00 18.35 0.33 0.00 0.01 0.00 0.80 0.79 1.93 2.63 1.82 0.00 11.98 4.78 0.01 13.57 18.35 -13.57 0.01 13.57 0.01 13.57
4/12/2013 15.94 0.00 0.00 15.94 0.21 0.00 0.01 0.00 0.51 0.73 1.45 2.65 1.58 0.00 10.26 4.44 0.01 11.49 15.94 -11.50 0.01 11.49 0.01 11.49
4/13/2013 17.81 0.00 0.00 17.81 0.31 0.00 0.01 0.00 0.75 0.76 1.83 2.63 1.79 0.00 11.56 4.73 0.01 13.07 17.81 -13.08 0.01 13.07 0.01 13.07
4/14/2013 17.53 0.00 0.00 17.53 0.31 0.00 0.01 0.00 0.75 0.77 1.83 2.14 1.90 0.00 11.66 4.35 0.01 13.17 17.53 -13.18 0.01 13.17 0.01 13.17
4/15/2013 19.69 0.00 0.00 19.69 0.62 0.00 0.03 0.00 1.09 0.75 2.49 2.63 2.03 0.00 12.54 5.28 0.03 14.38 19.69 -14.41 0.03 14.38 0.03 14.38
4/16/2013 17.59 0.00 0.00 17.59 0.28 0.00 0.01 0.00 0.68 0.74 1.71 3.02 1.69 0.00 11.17 4.99 0.01 12.59 17.59 -12.60 0.01 12.59 0.01 12.59
4/17/2013 17.90 0.00 0.00 17.90 0.31 0.00 0.01 0.00 0.75 0.81 1.87 2.90 1.90 0.00 11.23 5.11 0.01 12.79 17.90 -12.79 0.01 12.79 0.01 12.79
4/18/2013 18.66 0.00 0.00 18.66 0.34 0.00 0.01 0.00 0.82 0.76 1.93 2.74 2.16 0.00 11.83 5.24 0.01 13.42 18.66 -13.42 0.01 13.42 0.01 13.42
4/19/2013 20.01 0.00 0.00 20.01 0.39 0.00 0.01 0.00 0.95 0.72 2.07 3.20 2.07 0.00 12.68 5.66 0.01 14.35 20.01 -14.35 0.01 14.35 0.01 14.35
4/20/2013 16.59 0.00 0.00 16.59 0.28 0.00 0.01 0.00 0.67 0.63 1.58 2.09 1.69 0.00 11.23 4.05 0.01 12.53 16.59 -12.54 0.01 12.53 0.01 12.53
4/21/2013 16.65 0.00 0.00 16.65 0.25 0.00 0.01 0.00 0.60 0.64 1.49 2.73 1.72 0.00 10.71 4.69 0.01 11.95 16.65 -11.96 0.01 11.95 0.01 11.95
4/22/2013 19.66 0.00 0.00 19.66 0.37 0.00 0.01 0.00 0.90 0.69 1.97 3.16 2.06 0.00 12.48 5.59 0.01 14.07 19.66 -14.07 0.01 14.07 0.01 14.07
4/23/2013 16.90 0.00 0.00 16.90 0.28 0.00 0.01 0.00 0.67 0.72 1.68 2.41 1.85 0.00 10.97 4.53 0.01 12.36 16.90 -12.37 0.01 12.36 0.01 12.36
4/24/2013 17.81 0.00 0.00 17.81 0.31 0.00 0.01 0.00 0.75 0.94 2.00 2.67 1.87 0.00 11.27 4.84 0.01 12.96 17.81 -12.97 0.01 12.96 0.01 12.96
4/25/2013 20.01 0.00 0.00 20.01 0.39 0.00 0.01 0.00 0.96 0.72 2.08 2.98 2.18 0.00 12.77 5.55 0.01 14.45 20.01 -14.46 0.01 14.45 0.01 14.45
4/26/2013 18.43 0.00 0.00 18.43 0.44 0.00 0.02 0.00 0.87 0.75 2.08 2.72 2.01 0.00 11.62 5.17 0.02 13.24 18.43 -13.26 0.02 13.24 0.02 13.24
4/27/2013 18.76 0.00 0.00 18.76 0.35 0.00 0.01 0.00 0.85 0.72 1.93 2.72 2.03 0.00 12.08 5.10 0.01 13.66 18.76 -13.66 0.01 13.66 0.01 13.66
4/28/2013 18.70 0.00 0.00 18.70 0.31 0.00 0.01 0.00 0.75 0.72 1.79 3.16 1.92 0.00 11.83 5.39 0.01 13.30 18.70 -13.31 0.01 13.30 0.01 13.30
4/29/2013 17.69 0.00 0.00 17.69 0.32 0.00 0.01 0.00 0.77 0.74 1.84 2.33 1.77 0.00 11.75 4.42 0.01 13.26 17.69 -13.27 0.01 13.26 0.01 13.26
4/30/2013 17.73 0.00 0.00 17.73 0.27 0.00 0.01 0.00 0.66 0.68 1.62 3.11 1.75 0.00 11.25 5.13 0.01 12.59 17.73 -12.60 0.01 12.59 0.01 12.59
5/1/2013 17.12 0.00 0.00 17.12 0.26 0.00 0.01 0.00 0.63 0.71 1.60 2.50 1.85 0.00 11.16 4.61 0.01 12.50 17.12 -12.51 0.01 12.50 0.01 12.50
5/2/2013 16.98 0.00 0.00 16.98 0.23 0.00 0.01 0.00 0.55 0.67 1.46 2.91 1.82 0.00 10.78 4.96 0.01 12.01 16.98 -12.02 0.01 12.01 0.01 12.01
5/3/2013 18.37 0.00 0.00 18.37 0.32 0.00 0.01 0.00 0.78 0.69 1.80 2.47 2.08 0.00 12.02 4.87 0.01 13.50 18.37 -13.50 0.01 13.50 0.01 13.50
5/4/2013 19.47 0.00 0.00 19.47 0.45 0.00 0.02 0.00 0.78 0.71 1.96 3.78 1.95 0.00 11.78 6.18 0.02 13.27 19.47 -13.29 0.02 13.27 0.02 13.27
5/5/2013 17.85 0.00 0.00 17.85 0.32 0.00 0.01 0.00 0.78 0.69 1.80 2.00 2.00 0.00 12.05 4.32 0.01 13.52 17.85 -13.53 0.01 13.52 0.01 13.52
5/6/2013 16.05 0.00 0.00 16.05 0.21 0.00 0.01 0.00 0.52 0.73 1.47 2.39 1.55 0.00 10.64 4.15 0.01 11.89 16.05 -11.90 0.01 11.89 0.01 11.89
Page 3 of 9
(3) (4) (5) (7)=3+4+5 (8) (9) (10) (11) (12) (13)
L=8+9+10
+11+12+1
3 (14) (15) (17) (16)
(18)=8+9+
14+15
R=10+11+
17
19=12+13
+16
T=18+R+
19 (21)=18-3 (22)=R
(23)=19-4-
5 (24)=22 (25)=23
Water Withdrawal/Purchase (mgd) Consumptive Use (mgd) Water Use Discharged as Wastewater (mgd) Total Returned/Used in Each Basin (mgd) Net Basin Gain(+)/Loss(-) (mgd)
Interbasin Transfer
(mgd)
Jordan Lake
Withdrawal
Neuse Basin
Purchase
Total
System
Use Haw Cape Fear Neuse Total Haw Cape Fear Neuse Haw Cape Fear Neuse
Total- All
Basins Haw Cape Fear Neuse
Haw to
Cape Fear
Haw to
Neuse
DATE Haw Raleigh Durham Potable
WRF
Reuse Potable
WRF
Reuse Potable
WRF
Reuse
WTP
Process
Water WRF WRF
Total
WRFs
5/7/2013 17.41 0.00 0.00 17.41 0.25 0.00 0.01 0.00 0.62 0.70 1.58 2.88 1.64 0.00 11.31 4.77 0.01 12.63 17.41 -12.64 0.01 12.63 0.01 12.63
5/8/2013 19.39 0.00 0.00 19.39 0.36 0.00 0.01 0.00 0.89 0.73 1.99 2.55 1.83 0.00 13.02 4.74 0.01 14.64 19.39 -14.65 0.01 14.64 0.01 14.64
5/9/2013 17.71 0.00 0.00 17.71 0.29 0.00 0.01 0.00 0.71 0.69 1.70 2.31 1.78 0.00 11.92 4.38 0.01 13.32 17.71 -13.33 0.01 13.32 0.01 13.32
5/10/2013 17.83 0.00 0.00 17.83 0.26 0.00 0.01 0.00 0.64 0.76 1.67 3.08 1.86 0.00 11.23 5.20 0.01 12.62 17.83 -12.63 0.01 12.62 0.01 12.62
5/11/2013 17.91 0.00 0.00 17.91 0.31 0.00 0.01 0.00 0.76 0.72 1.80 2.03 2.00 0.00 12.07 4.35 0.01 13.56 17.91 -13.56 0.01 13.56 0.01 13.56
5/12/2013 18.15 0.00 0.00 18.15 0.32 0.00 0.01 0.00 0.77 0.68 1.78 2.06 2.08 0.00 12.24 4.45 0.01 13.69 18.15 -13.70 0.01 13.69 0.01 13.69
5/13/2013 18.07 0.00 0.00 18.07 0.31 0.00 0.01 0.00 0.76 0.76 1.84 2.06 2.10 0.00 12.07 4.47 0.01 13.59 18.07 -13.60 0.01 13.59 0.01 13.59
5/14/2013 20.71 0.00 0.00 20.71 0.52 0.00 0.02 0.00 0.99 0.75 2.29 3.34 2.14 0.00 12.94 6.01 0.02 14.68 20.71 -14.70 0.02 14.68 0.02 14.68
5/15/2013 18.49 0.00 0.00 18.49 0.32 0.00 0.01 0.00 0.79 0.85 1.96 2.41 2.01 0.00 12.10 4.75 0.01 13.74 18.49 -13.74 0.01 13.74 0.01 13.74
5/16/2013 21.96 0.00 0.00 21.96 0.95 0.00 0.04 0.00 1.89 0.83 3.71 2.42 2.20 0.00 13.63 5.57 0.04 16.35 21.96 -16.39 0.04 16.35 0.04 16.35
5/17/2013 20.80 0.00 0.00 20.80 0.70 0.00 0.02 0.00 1.69 0.87 3.27 2.25 2.25 0.00 13.03 5.20 0.02 15.58 20.80 -15.60 0.02 15.58 0.02 15.58
5/18/2013 18.63 0.00 0.00 18.63 0.34 0.00 0.01 0.00 0.83 0.80 1.97 2.04 2.13 0.00 12.48 4.51 0.01 14.11 18.63 -14.12 0.01 14.11 0.01 14.11
5/19/2013 18.24 0.00 0.00 18.24 0.31 0.00 0.01 0.00 0.75 0.71 1.77 2.43 1.82 0.00 12.21 4.56 0.01 13.67 18.24 -13.68 0.01 13.67 0.01 13.67
5/20/2013 16.99 0.00 0.00 16.99 0.27 0.00 0.01 0.00 0.66 0.70 1.64 2.13 1.76 0.00 11.46 4.16 0.01 12.82 16.99 -12.83 0.01 12.82 0.01 12.82
5/21/2013 18.67 0.00 0.00 18.67 0.29 0.00 0.01 0.00 0.72 0.71 1.72 3.29 1.85 0.00 11.80 5.44 0.01 13.22 18.67 -13.23 0.01 13.22 0.01 13.22
5/22/2013 18.45 0.00 0.00 18.45 0.31 0.00 0.01 0.00 0.76 0.82 1.90 2.54 1.87 0.00 12.14 4.72 0.01 13.72 18.45 -13.73 0.01 13.72 0.01 13.72
5/23/2013 18.14 0.00 0.00 18.14 0.34 0.00 0.01 0.00 0.83 0.74 1.92 1.54 1.97 0.00 12.71 3.85 0.01 14.28 18.14 -14.29 0.01 14.28 0.01 14.28
5/24/2013 19.01 0.00 0.00 19.01 0.32 0.00 0.01 0.00 0.78 0.77 1.87 2.82 1.97 0.00 12.34 5.11 0.01 13.89 19.01 -13.90 0.01 13.89 0.01 13.89
5/25/2013 18.25 0.00 0.00 18.25 0.28 0.00 0.01 0.00 0.67 0.80 1.76 3.06 1.76 0.00 11.67 5.10 0.01 13.14 18.25 -13.15 0.01 13.14 0.01 13.14
5/26/2013 19.03 0.00 0.00 19.03 0.66 0.00 0.02 0.00 1.59 0.74 3.00 1.79 2.01 0.00 12.23 4.45 0.02 14.56 19.03 -14.58 0.02 14.56 0.02 14.56
5/27/2013 16.72 0.00 0.00 16.72 0.30 0.00 0.01 0.00 0.73 0.82 1.86 1.15 2.11 0.00 11.60 3.56 0.01 13.15 16.72 -13.16 0.01 13.15 0.01 13.15
5/28/2013 22.00 0.00 0.00 22.00 0.53 0.00 0.02 0.00 1.14 0.95 2.63 3.45 2.41 0.00 13.51 6.39 0.02 15.59 22.00 -15.61 0.02 15.59 0.02 15.59
5/29/2013 21.94 0.00 0.00 21.94 0.88 0.00 0.03 0.00 2.02 1.08 4.02 2.23 2.24 0.00 13.46 5.35 0.03 16.56 21.94 -16.59 0.03 16.56 0.03 16.56
5/30/2013 22.76 0.00 0.00 22.76 1.13 0.00 0.05 0.00 2.10 1.07 4.35 2.48 2.40 0.00 13.52 6.01 0.05 16.70 22.76 -16.75 0.05 16.70 0.05 16.70
5/31/2013 24.38 0.00 0.00 24.38 1.32 0.00 0.04 0.00 3.20 0.84 5.40 3.25 2.44 0.00 13.29 7.01 0.04 17.33 24.38 -17.37 0.04 17.33 0.04 17.33
6/1/2013 24.81 0.00 0.00 24.81 1.92 0.00 0.08 0.00 3.82 1.00 6.81 3.17 2.39 0.00 12.44 7.48 0.08 17.25 24.81 -17.33 0.08 17.25 0.08 17.25
6/2/2013 23.16 0.00 0.00 23.16 1.44 0.00 0.05 0.00 3.17 0.86 5.53 2.22 2.49 0.00 12.93 6.15 0.05 16.96 23.16 -17.01 0.05 16.96 0.05 16.96
6/3/2013 18.23 0.00 0.00 18.23 0.42 0.00 0.01 0.00 1.02 0.76 2.21 1.44 2.25 0.00 12.33 4.11 0.01 14.12 18.23 -14.12 0.01 14.12 0.01 14.12
6/4/2013 19.73 0.00 0.00 19.73 0.50 0.00 0.02 0.00 0.98 0.79 2.29 3.80 2.30 0.00 11.34 6.60 0.02 13.11 19.73 -13.13 0.02 13.11 0.02 13.11
6/5/2013 22.89 0.00 0.00 22.89 0.90 0.00 0.04 0.00 1.71 0.80 3.45 3.00 2.15 0.00 14.29 6.05 0.04 16.80 22.89 -16.84 0.04 16.80 0.04 16.80
6/6/2013 19.50 0.00 0.00 19.50 0.45 0.00 0.01 0.00 1.11 0.89 2.46 1.88 2.21 0.00 12.95 4.54 0.01 14.95 19.50 -14.96 0.01 14.95 0.01 14.95
6/7/2013 17.14 0.00 0.00 17.14 0.31 0.00 0.01 0.00 0.76 0.60 1.68 2.44 1.63 0.00 11.39 4.38 0.01 12.76 17.14 -12.76 0.01 12.76 0.01 12.76
6/8/2013 18.56 0.00 0.00 18.56 0.35 0.00 0.01 0.00 0.85 0.81 2.02 2.88 1.66 0.00 12.00 4.89 0.01 13.67 18.56 -13.67 0.01 13.67 0.01 13.67
6/9/2013 18.48 0.00 0.00 18.48 0.39 0.00 0.01 0.00 0.94 0.67 2.00 1.88 2.03 0.00 12.56 4.30 0.01 14.17 18.48 -14.18 0.01 14.17 0.01 14.17
6/10/2013 19.44 0.00 0.00 19.44 0.38 0.00 0.01 0.00 0.92 0.70 2.01 3.19 2.04 0.00 12.20 5.61 0.01 13.83 19.44 -13.83 0.01 13.83 0.01 13.83
6/11/2013 19.64 0.00 0.00 19.64 0.40 0.00 0.01 0.00 0.97 0.76 2.14 3.05 2.15 0.00 12.30 5.60 0.01 14.04 19.64 -14.04 0.01 14.04 0.01 14.04
6/12/2013 20.20 0.00 0.00 20.20 0.47 0.00 0.01 0.00 1.15 0.92 2.54 2.11 2.33 0.00 13.22 4.91 0.01 15.28 20.20 -15.29 0.01 15.28 0.01 15.28
6/13/2013 19.57 0.00 0.00 19.57 0.43 0.00 0.01 0.00 1.03 0.93 2.40 2.40 2.36 0.00 12.42 5.18 0.01 14.38 19.57 -14.39 0.01 14.38 0.01 14.38
6/14/2013 20.90 0.00 0.00 20.90 0.51 0.00 0.01 0.00 1.23 0.74 2.48 2.51 2.38 0.00 13.53 5.40 0.01 15.50 20.90 -15.50 0.01 15.50 0.01 15.50
6/15/2013 21.22 0.00 0.00 21.22 0.72 0.00 0.03 0.00 1.32 0.92 2.99 3.02 2.42 0.00 12.79 6.15 0.03 15.03 21.22 -15.07 0.03 15.03 0.03 15.03
6/16/2013 21.23 0.00 0.00 21.23 0.84 0.00 0.03 0.00 1.59 0.76 3.21 2.49 2.47 0.00 13.06 5.79 0.03 15.40 21.23 -15.44 0.03 15.40 0.03 15.40
6/17/2013 19.02 0.00 0.00 19.02 0.42 0.00 0.01 0.00 1.02 0.81 2.26 2.14 2.31 0.00 12.31 4.87 0.01 14.14 19.02 -14.15 0.01 14.14 0.01 14.14
Page 4 of 9
(3) (4) (5) (7)=3+4+5 (8) (9) (10) (11) (12) (13)
L=8+9+10
+11+12+1
3 (14) (15) (17) (16)
(18)=8+9+
14+15
R=10+11+
17
19=12+13
+16
T=18+R+
19 (21)=18-3 (22)=R
(23)=19-4-
5 (24)=22 (25)=23
Water Withdrawal/Purchase (mgd) Consumptive Use (mgd) Water Use Discharged as Wastewater (mgd) Total Returned/Used in Each Basin (mgd) Net Basin Gain(+)/Loss(-) (mgd)
Interbasin Transfer
(mgd)
Jordan Lake
Withdrawal
Neuse Basin
Purchase
Total
System
Use Haw Cape Fear Neuse Total Haw Cape Fear Neuse Haw Cape Fear Neuse
Total- All
Basins Haw Cape Fear Neuse
Haw to
Cape Fear
Haw to
Neuse
DATE Haw Raleigh Durham Potable
WRF
Reuse Potable
WRF
Reuse Potable
WRF
Reuse
WTP
Process
Water WRF WRF
Total
WRFs
6/18/2013 20.62 0.00 0.00 20.62 0.46 0.00 0.01 0.00 1.13 0.87 2.47 2.77 2.07 0.00 13.31 5.30 0.01 15.31 20.62 -15.32 0.01 15.31 0.01 15.31
6/19/2013 19.40 0.00 0.00 19.40 0.39 0.00 0.01 0.00 0.96 0.78 2.14 2.79 2.15 0.00 12.31 5.34 0.01 14.06 19.40 -14.06 0.01 14.06 0.01 14.06
6/20/2013 20.30 0.00 0.00 20.30 0.60 0.00 0.02 0.00 1.39 0.91 2.92 1.46 2.43 0.00 13.49 4.49 0.02 15.79 20.30 -15.81 0.02 15.79 0.02 15.79
6/21/2013 22.54 0.00 0.00 22.54 1.08 0.00 0.05 0.00 1.63 0.94 3.70 2.98 2.32 0.00 13.54 6.38 0.05 16.11 22.54 -16.16 0.05 16.11 0.05 16.11
6/22/2013 21.07 0.00 0.00 21.07 0.55 0.00 0.01 0.00 1.34 1.02 2.92 3.15 2.37 0.00 12.63 6.07 0.01 14.99 21.07 -15.00 0.01 14.99 0.01 14.99
6/23/2013 22.45 0.00 0.00 22.45 1.06 0.00 0.05 0.00 1.93 0.89 3.93 2.75 2.44 0.00 13.33 6.26 0.05 16.15 22.45 -16.19 0.05 16.15 0.05 16.15
6/24/2013 19.08 0.00 0.00 19.08 0.49 0.00 0.00 0.00 1.20 0.84 2.54 1.28 2.30 0.00 12.96 4.07 0.00 15.00 19.08 -15.01 0.00 15.00 0.00 15.00
6/25/2013 23.61 0.00 0.00 23.61 1.27 0.00 0.03 0.00 3.09 1.05 5.45 2.73 2.32 0.00 13.12 6.32 0.03 17.25 23.61 -17.29 0.03 17.25 0.03 17.25
6/26/2013 22.17 0.00 0.00 22.17 0.98 0.00 0.05 0.00 1.60 0.91 3.54 2.78 2.40 0.00 13.45 6.16 0.05 15.96 22.17 -16.01 0.05 15.96 0.05 15.96
6/27/2013 20.52 0.00 0.00 20.52 0.48 0.00 0.01 0.00 1.17 0.79 2.45 2.70 2.39 0.00 12.98 5.57 0.01 14.94 20.52 -14.95 0.01 14.94 0.01 14.94
6/28/2013 23.06 0.00 0.00 23.06 0.83 0.00 0.01 0.00 2.01 0.77 3.62 2.32 2.51 0.00 14.61 5.66 0.01 17.39 23.06 -17.40 0.01 17.39 0.01 17.39
6/29/2013 17.82 0.00 0.00 17.82 0.36 0.00 0.01 0.00 0.87 0.70 1.93 2.34 2.01 0.00 11.54 4.71 0.01 13.11 17.82 -13.11 0.01 13.11 0.01 13.11
6/30/2013 20.31 0.00 0.00 20.31 0.51 0.00 0.02 0.00 1.21 0.63 2.36 2.35 2.47 0.00 13.14 5.32 0.02 14.97 20.31 -14.99 0.02 14.97 0.02 14.97
7/1/2013 16.64 0.00 0.00 16.64 0.27 0.00 0.00 0.00 0.67 0.70 1.65 2.43 1.89 0.00 10.67 4.59 0.00 12.04 16.64 -12.05 0.00 12.04 0.00 12.04
7/2/2013 18.24 0.00 0.00 18.24 0.32 0.00 0.01 0.00 0.78 0.74 1.84 2.52 1.88 0.00 12.00 4.72 0.01 13.52 18.24 -13.52 0.01 13.52 0.01 13.52
7/3/2013 19.64 0.00 0.00 19.64 0.36 0.00 0.01 0.00 0.87 0.66 1.89 3.43 2.10 0.00 12.22 5.89 0.01 13.75 19.64 -13.75 0.01 13.75 0.01 13.75
7/4/2013 18.84 0.00 0.00 18.84 0.55 0.00 0.01 0.00 1.35 0.60 2.51 2.43 2.42 0.00 11.48 5.40 0.01 13.43 18.84 -13.44 0.01 13.43 0.01 13.43
7/5/2013 17.98 0.00 0.00 17.98 0.34 0.00 0.01 0.00 0.84 0.62 1.80 1.96 2.20 0.00 12.02 4.50 0.01 13.47 17.98 -13.48 0.01 13.47 0.01 13.47
7/6/2013 20.36 0.00 0.00 20.36 0.52 0.00 0.01 0.00 1.27 0.70 2.49 2.33 2.37 0.00 13.17 5.22 0.01 15.13 20.36 -15.14 0.01 15.13 0.01 15.13
7/7/2013 20.22 0.00 0.00 20.22 0.42 0.00 0.01 0.00 1.01 0.61 2.04 2.37 2.45 0.00 13.36 5.24 0.01 14.98 20.22 -14.98 0.01 14.98 0.01 14.98
7/8/2013 20.52 0.00 0.00 20.52 0.45 0.00 0.01 0.00 1.09 0.58 2.12 2.40 2.42 0.00 13.58 5.27 0.01 15.25 20.52 -15.25 0.01 15.25 0.01 15.25
7/9/2013 20.96 0.00 0.00 20.96 0.48 0.00 0.01 0.00 1.15 0.94 2.58 2.67 2.31 0.00 13.41 5.45 0.01 15.49 20.96 -15.51 0.01 15.49 0.01 15.49
7/10/2013 21.44 0.00 0.00 21.44 0.45 0.00 0.01 0.00 1.09 1.03 2.58 3.18 2.31 0.00 13.38 5.94 0.01 15.49 21.44 -15.50 0.01 15.49 0.01 15.49
7/11/2013 19.03 0.00 0.00 19.03 0.39 0.00 0.01 0.00 0.94 0.98 2.32 1.84 2.15 0.00 12.72 4.38 0.01 14.64 19.03 -14.65 0.01 14.64 0.01 14.64
7/12/2013 18.51 0.00 0.00 18.51 0.37 0.00 0.01 0.00 0.91 0.79 2.08 1.71 2.15 0.00 12.58 4.23 0.01 14.27 18.51 -14.28 0.01 14.27 0.01 14.27
7/13/2013 18.46 0.00 0.00 18.46 0.32 0.00 0.01 0.00 0.77 0.86 1.95 2.75 1.96 0.00 11.80 5.03 0.01 13.42 18.46 -13.43 0.01 13.42 0.01 13.42
7/14/2013 18.20 0.00 0.00 18.20 0.32 0.00 0.01 0.00 0.79 0.75 1.87 2.45 2.08 0.00 11.79 4.86 0.01 13.34 18.20 -13.34 0.01 13.34 0.01 13.34
7/15/2013 18.04 0.00 0.00 18.04 0.30 0.00 0.01 0.00 0.72 0.86 1.89 2.62 2.02 0.00 11.51 4.94 0.01 13.09 18.04 -13.10 0.01 13.09 0.01 13.09
7/16/2013 20.45 0.00 0.00 20.45 0.58 0.00 0.02 0.00 1.14 1.10 2.84 2.47 2.22 0.00 12.92 5.27 0.02 15.16 20.45 -15.18 0.02 15.16 0.02 15.16
7/17/2013 22.84 0.00 0.00 22.84 1.03 0.00 0.02 0.00 2.51 1.09 4.66 2.43 2.31 0.00 13.44 5.78 0.02 17.04 22.84 -17.06 0.02 17.04 0.02 17.04
7/18/2013 21.74 0.00 0.00 21.74 0.76 0.00 0.01 0.00 1.85 1.12 3.74 2.50 1.87 0.00 13.63 5.13 0.01 16.60 21.74 -16.61 0.01 16.60 0.01 16.60
7/19/2013 21.21 0.00 0.00 21.21 0.86 0.00 0.04 0.00 1.28 1.00 3.18 2.95 0.92 0.00 14.15 4.73 0.04 16.44 21.21 -16.48 0.04 16.44 0.04 16.44
7/20/2013 23.04 0.00 0.00 23.04 1.40 0.00 0.02 0.00 3.40 1.12 5.95 2.17 0.90 0.00 14.02 4.47 0.02 18.55 23.04 -18.57 0.02 18.55 0.02 18.55
7/21/2013 22.10 0.00 0.00 22.10 1.00 0.00 0.04 0.00 1.98 0.89 3.91 2.76 0.92 0.00 14.50 4.68 0.04 17.38 22.10 -17.42 0.04 17.38 0.04 17.38
7/22/2013 20.74 0.00 0.00 20.74 0.80 0.00 0.04 0.00 1.28 0.90 3.01 2.47 0.93 0.00 14.33 4.19 0.04 16.51 20.74 -16.55 0.04 16.51 0.04 16.51
7/23/2013 20.72 0.00 0.00 20.72 0.51 0.00 0.02 0.00 1.04 1.20 2.77 3.66 0.86 0.00 13.43 5.03 0.02 15.67 20.72 -15.69 0.02 15.67 0.02 15.67
7/24/2013 24.43 0.00 0.00 24.43 1.71 0.00 0.06 0.00 3.66 1.10 6.53 2.31 1.14 0.00 14.45 5.16 0.06 19.21 24.43 -19.27 0.06 19.21 0.06 19.21
7/25/2013 22.95 0.00 0.00 22.95 1.15 0.00 0.04 0.00 2.65 1.01 4.85 2.95 0.93 0.00 14.22 5.03 0.04 17.88 22.95 -17.92 0.04 17.88 0.04 17.88
7/26/2013 25.06 0.00 0.00 25.06 1.86 0.00 0.05 0.00 4.49 0.91 7.31 3.11 0.90 0.00 13.74 5.87 0.05 19.14 25.06 -19.19 0.05 19.14 0.05 19.14
7/27/2013 23.05 0.00 0.00 23.05 1.25 0.00 0.05 0.00 2.37 1.10 4.77 3.46 0.87 0.00 13.96 5.58 0.05 17.42 23.05 -17.47 0.05 17.42 0.05 17.42
7/28/2013 18.74 0.00 0.00 18.74 0.36 0.00 0.01 0.00 0.87 0.89 2.13 2.34 0.86 0.00 13.40 3.56 0.01 15.17 18.74 -15.18 0.01 15.17 0.01 15.17
7/29/2013 22.39 0.00 0.00 22.39 0.75 0.00 0.03 0.00 1.32 0.86 2.96 3.81 1.02 0.00 14.60 5.58 0.03 16.77 22.39 -16.81 0.03 16.77 0.03 16.77
Page 5 of 9
(3) (4) (5) (7)=3+4+5 (8) (9) (10) (11) (12) (13)
L=8+9+10
+11+12+1
3 (14) (15) (17) (16)
(18)=8+9+
14+15
R=10+11+
17
19=12+13
+16
T=18+R+
19 (21)=18-3 (22)=R
(23)=19-4-
5 (24)=22 (25)=23
Water Withdrawal/Purchase (mgd) Consumptive Use (mgd) Water Use Discharged as Wastewater (mgd) Total Returned/Used in Each Basin (mgd) Net Basin Gain(+)/Loss(-) (mgd)
Interbasin Transfer
(mgd)
Jordan Lake
Withdrawal
Neuse Basin
Purchase
Total
System
Use Haw Cape Fear Neuse Total Haw Cape Fear Neuse Haw Cape Fear Neuse
Total- All
Basins Haw Cape Fear Neuse
Haw to
Cape Fear
Haw to
Neuse
DATE Haw Raleigh Durham Potable
WRF
Reuse Potable
WRF
Reuse Potable
WRF
Reuse
WTP
Process
Water WRF WRF
Total
WRFs
7/30/2013 22.43 0.00 0.00 22.43 0.93 0.00 0.03 0.00 2.07 1.13 4.16 3.44 0.93 0.00 13.89 5.30 0.03 17.10 22.43 -17.13 0.03 17.10 0.03 17.10
7/31/2013 21.46 0.00 0.00 21.46 0.74 0.00 0.03 0.00 1.45 1.04 3.26 2.75 0.96 0.00 14.49 4.45 0.03 16.98 21.46 -17.01 0.03 16.98 0.03 16.98
8/1/2013 21.17 0.00 0.00 21.17 0.95 0.00 0.03 0.00 2.08 0.93 3.99 1.51 0.97 0.00 14.70 3.43 0.03 17.70 21.17 -17.74 0.03 17.70 0.03 17.70
8/2/2013 19.79 0.00 0.00 19.79 0.75 0.00 0.03 0.00 1.28 0.83 2.90 2.42 0.94 0.00 13.53 4.11 0.03 15.64 19.79 -15.68 0.03 15.64 0.03 15.64
8/3/2013 20.74 0.00 0.00 20.74 0.70 0.00 0.03 0.00 1.42 0.95 3.10 2.15 0.92 0.00 14.57 3.77 0.03 16.94 20.74 -16.97 0.03 16.94 0.03 16.94
8/4/2013 18.74 0.00 0.00 18.74 0.45 0.00 0.01 0.00 1.10 0.74 2.30 1.73 0.88 0.00 13.83 3.06 0.01 15.67 18.74 -15.68 0.01 15.67 0.01 15.67
8/5/2013 19.85 0.00 0.00 19.85 0.81 0.00 0.03 0.00 1.64 0.82 3.30 1.17 0.98 0.00 14.39 2.97 0.03 16.85 19.85 -16.88 0.03 16.85 0.03 16.85
8/6/2013 20.20 0.00 0.00 20.20 0.98 0.00 0.05 0.00 1.49 1.12 3.63 1.62 0.97 0.00 13.97 3.57 0.05 16.58 20.20 -16.63 0.05 16.58 0.05 16.58
8/7/2013 20.74 0.00 0.00 20.74 1.08 0.00 0.06 0.00 1.58 0.99 3.70 1.95 1.33 0.00 13.75 4.36 0.06 16.32 20.74 -16.38 0.06 16.32 0.06 16.32
8/8/2013 22.74 0.00 0.00 22.74 1.13 0.00 0.04 0.00 2.56 1.09 4.83 2.55 2.38 0.00 12.98 6.06 0.04 16.64 22.74 -16.68 0.04 16.64 0.04 16.64
8/9/2013 23.50 0.00 0.00 23.50 2.11 0.00 0.09 0.00 4.13 0.96 7.29 1.08 2.37 0.00 12.76 5.56 0.09 17.85 23.50 -17.94 0.09 17.85 0.09 17.85
8/10/2013 20.76 0.00 0.00 20.76 0.93 0.00 0.05 0.00 1.43 1.13 3.54 2.63 2.25 0.00 12.34 5.81 0.05 14.90 20.76 -14.95 0.05 14.90 0.05 14.90
8/11/2013 21.48 0.00 0.00 21.48 0.87 0.00 0.02 0.00 2.10 0.93 3.93 2.33 2.38 0.00 12.85 5.58 0.02 15.88 21.48 -15.90 0.02 15.88 0.02 15.88
8/12/2013 20.19 0.00 0.00 20.19 0.85 0.00 0.03 0.00 1.75 0.96 3.59 1.66 2.43 0.00 12.50 4.95 0.03 15.21 20.19 -15.24 0.03 15.21 0.03 15.21
8/13/2013 20.35 0.00 0.00 20.35 0.75 0.00 0.03 0.00 1.35 0.91 3.04 2.30 2.25 0.00 12.76 5.31 0.03 15.01 20.35 -15.04 0.03 15.01 0.03 15.01
8/14/2013 22.08 0.00 0.00 22.08 1.23 0.00 0.05 0.00 2.47 0.88 4.63 1.71 2.36 0.00 13.38 5.30 0.05 16.73 22.08 -16.78 0.05 16.73 0.05 16.73
8/15/2013 21.50 0.00 0.00 21.50 1.12 0.00 0.04 0.00 2.38 1.03 4.57 2.13 2.26 0.00 12.54 5.51 0.04 15.95 21.50 -15.99 0.04 15.95 0.04 15.95
8/16/2013 20.35 0.00 0.00 20.35 1.01 0.00 0.05 0.00 1.40 0.91 3.37 2.67 2.21 0.00 12.10 5.88 0.05 14.41 20.35 -14.47 0.05 14.41 0.05 14.41
8/17/2013 20.47 0.00 0.00 20.47 0.76 0.00 0.02 0.00 1.85 1.02 3.65 2.06 2.29 0.00 12.47 5.11 0.02 15.34 20.47 -15.36 0.02 15.34 0.02 15.34
8/18/2013 18.54 0.00 0.00 18.54 0.57 0.00 0.03 0.00 1.05 0.74 2.38 2.41 2.12 0.00 11.63 5.10 0.03 13.41 18.54 -13.44 0.03 13.41 0.03 13.41
8/19/2013 20.38 0.00 0.00 20.38 0.46 0.00 0.01 0.00 1.13 0.78 2.38 2.81 2.34 0.00 12.86 5.61 0.01 14.76 20.38 -14.77 0.01 14.76 0.01 14.76
8/20/2013 18.43 0.00 0.00 18.43 0.40 0.00 0.01 0.00 0.97 0.89 2.27 2.16 2.13 0.00 11.87 4.69 0.01 13.73 18.43 -13.74 0.01 13.73 0.01 13.73
8/21/2013 18.69 0.00 0.00 18.69 0.61 0.00 0.03 0.00 1.08 0.80 2.51 2.39 2.11 0.00 11.68 5.11 0.03 13.55 18.69 -13.58 0.03 13.55 0.03 13.55
8/22/2013 20.90 0.00 0.00 20.90 0.71 0.00 0.02 0.00 1.63 0.92 3.28 2.36 2.36 0.00 12.90 5.43 0.02 15.45 20.90 -15.47 0.02 15.45 0.02 15.45
8/23/2013 20.66 0.00 0.00 20.66 1.01 0.00 0.04 0.00 2.17 0.94 4.16 1.49 2.42 0.00 12.59 4.92 0.04 15.70 20.66 -15.74 0.04 15.70 0.04 15.70
8/24/2013 21.53 0.00 0.00 21.53 1.23 0.00 0.07 0.00 1.53 1.07 3.90 3.33 2.26 0.00 12.04 6.82 0.07 14.64 21.53 -14.71 0.07 14.64 0.07 14.64
8/25/2013 21.43 0.00 0.00 21.43 1.53 0.00 0.08 0.00 2.28 0.82 4.72 1.55 2.43 0.00 12.74 5.51 0.08 15.84 21.43 -15.92 0.08 15.84 0.08 15.84
8/26/2013 20.65 0.00 0.00 20.65 1.20 0.00 0.07 0.00 1.60 0.96 3.82 1.83 2.45 0.00 12.55 5.47 0.07 15.11 20.65 -15.18 0.07 15.11 0.07 15.11
8/27/2013 24.01 0.00 0.00 24.01 2.27 0.00 0.10 0.00 4.03 1.19 7.60 1.72 2.37 0.00 12.32 6.36 0.10 17.55 24.01 -17.65 0.10 17.55 0.10 17.55
8/28/2013 24.85 0.00 0.00 24.85 1.55 0.00 0.05 0.00 3.45 1.06 6.11 3.24 2.36 0.00 13.14 7.15 0.05 17.65 24.85 -17.70 0.05 17.65 0.05 17.65
8/29/2013 22.07 0.00 0.00 22.07 1.50 0.00 0.05 0.00 3.42 1.11 6.08 1.29 2.36 0.00 12.34 5.15 0.05 16.87 22.07 -16.92 0.05 16.87 0.05 16.87
8/30/2013 22.43 0.00 0.00 22.43 1.61 0.00 0.05 0.00 3.78 1.08 6.52 1.44 2.38 0.00 12.09 5.43 0.05 16.95 22.43 -17.00 0.05 16.95 0.05 16.95
8/31/2013 23.15 0.00 0.00 23.15 1.88 0.00 0.07 0.00 3.78 1.15 6.88 2.68 2.21 0.00 11.38 6.76 0.07 16.31 23.15 -16.39 0.07 16.31 0.07 16.31
9/1/2013 20.67 0.00 0.00 20.67 0.73 0.00 0.02 0.00 1.72 0.91 3.38 1.63 2.19 0.00 13.47 4.55 0.02 16.10 20.67 -16.12 0.02 16.10 0.02 16.10
9/2/2013 17.02 0.00 0.00 17.02 0.41 0.00 0.01 0.00 0.89 0.77 2.08 1.50 2.08 0.00 11.36 3.99 0.01 13.02 17.02 -13.03 0.01 13.02 0.01 13.02
9/3/2013 21.70 0.00 0.00 21.70 0.91 0.00 0.03 0.00 2.07 0.99 4.00 2.14 2.50 0.00 13.06 5.55 0.03 16.12 21.70 -16.15 0.03 16.12 0.03 16.12
9/4/2013 21.14 0.00 0.00 21.14 1.60 0.00 0.09 0.00 2.21 0.93 4.83 1.59 2.41 0.00 12.31 5.60 0.09 15.45 21.14 -15.54 0.09 15.45 0.09 15.45
9/5/2013 21.63 0.00 0.00 21.63 1.35 0.00 0.05 0.00 2.99 1.11 5.49 1.88 2.31 0.00 11.95 5.54 0.05 16.05 21.63 -16.09 0.05 16.05 0.05 16.05
9/6/2013 21.56 0.00 0.00 21.56 1.84 0.00 0.08 0.00 3.28 0.98 6.17 1.04 2.30 0.00 12.05 5.17 0.08 16.30 21.56 -16.39 0.08 16.30 0.08 16.30
9/7/2013 21.36 0.00 0.00 21.36 1.23 0.00 0.06 0.00 2.12 1.13 4.53 2.61 2.29 0.00 11.94 6.12 0.06 15.18 21.36 -15.24 0.06 15.18 0.06 15.18
9/8/2013 22.17 0.00 0.00 22.17 1.77 0.00 0.09 0.00 2.88 0.93 5.66 1.59 2.39 0.00 12.52 5.75 0.09 16.33 22.17 -16.42 0.09 16.33 0.09 16.33
9/9/2013 22.03 0.00 0.00 22.03 1.44 0.00 0.07 0.00 2.37 1.06 4.94 2.25 2.41 0.00 12.43 6.10 0.07 15.86 22.03 -15.93 0.07 15.86 0.07 15.86
Page 6 of 9
(3) (4) (5) (7)=3+4+5 (8) (9) (10) (11) (12) (13)
L=8+9+10
+11+12+1
3 (14) (15) (17) (16)
(18)=8+9+
14+15
R=10+11+
17
19=12+13
+16
T=18+R+
19 (21)=18-3 (22)=R
(23)=19-4-
5 (24)=22 (25)=23
Water Withdrawal/Purchase (mgd) Consumptive Use (mgd) Water Use Discharged as Wastewater (mgd) Total Returned/Used in Each Basin (mgd) Net Basin Gain(+)/Loss(-) (mgd)
Interbasin Transfer
(mgd)
Jordan Lake
Withdrawal
Neuse Basin
Purchase
Total
System
Use Haw Cape Fear Neuse Total Haw Cape Fear Neuse Haw Cape Fear Neuse
Total- All
Basins Haw Cape Fear Neuse
Haw to
Cape Fear
Haw to
Neuse
DATE Haw Raleigh Durham Potable
WRF
Reuse Potable
WRF
Reuse Potable
WRF
Reuse
WTP
Process
Water WRF WRF
Total
WRFs
9/10/2013 22.73 0.00 0.00 22.73 1.60 0.00 0.06 0.00 3.36 1.21 6.23 2.03 2.34 0.00 12.13 5.97 0.06 16.70 22.73 -16.76 0.06 16.70 0.06 16.70
9/11/2013 25.05 0.00 0.00 25.05 1.92 0.00 0.06 0.00 4.65 1.15 7.78 2.24 2.32 0.00 12.71 6.48 0.06 18.51 25.05 -18.57 0.06 18.51 0.06 18.51
9/12/2013 23.89 0.00 0.00 23.89 1.99 0.00 0.08 0.00 4.01 1.27 7.34 2.12 2.28 0.00 12.15 6.39 0.08 17.43 23.89 -17.50 0.08 17.43 0.08 17.43
9/13/2013 21.77 0.00 0.00 21.77 1.31 0.00 0.04 0.00 2.94 1.16 5.46 1.89 2.28 0.00 12.14 5.48 0.04 16.25 21.77 -16.29 0.04 16.25 0.04 16.25
9/14/2013 22.61 0.00 0.00 22.61 1.83 0.00 0.07 0.00 3.94 1.16 6.99 2.04 2.21 0.00 11.38 6.08 0.07 16.47 22.61 -16.53 0.07 16.47 0.07 16.47
9/15/2013 23.51 0.00 0.00 23.51 1.89 0.00 0.06 0.00 4.25 0.92 7.12 1.85 2.29 0.00 12.25 6.02 0.06 17.42 23.51 -17.49 0.06 17.42 0.06 17.42
9/16/2013 20.46 0.00 0.00 20.46 0.59 0.00 0.01 0.00 1.44 0.98 3.02 2.45 2.37 0.00 12.62 5.41 0.01 15.04 20.46 -15.05 0.01 15.04 0.01 15.04
9/17/2013 21.17 0.00 0.00 21.17 1.31 0.00 0.04 0.00 2.94 1.18 5.48 1.64 2.21 0.00 11.84 5.16 0.04 15.96 21.17 -16.01 0.04 15.96 0.04 15.96
9/18/2013 22.58 0.00 0.00 22.58 1.82 0.00 0.06 0.00 3.92 1.13 6.93 1.36 2.24 0.00 12.05 5.42 0.06 17.10 22.58 -17.16 0.06 17.10 0.06 17.10
9/19/2013 22.58 0.00 0.00 22.58 1.95 0.00 0.06 0.00 4.47 1.28 7.77 0.74 2.21 0.00 11.86 4.91 0.06 17.61 22.58 -17.67 0.06 17.61 0.06 17.61
9/20/2013 20.94 0.00 0.00 20.94 1.26 0.00 0.04 0.00 2.94 0.93 5.17 1.13 2.32 0.00 12.32 4.71 0.04 16.19 20.94 -16.23 0.04 16.19 0.04 16.19
9/21/2013 18.99 0.00 0.00 18.99 0.97 0.00 0.03 0.00 2.34 0.86 4.20 -0.84 2.41 0.00 13.22 2.54 0.03 16.42 18.99 -16.45 0.03 16.42 0.03 16.42
9/22/2013 18.62 0.00 0.00 18.62 0.44 0.00 0.01 0.00 1.08 0.75 2.28 1.03 2.33 0.00 12.98 3.80 0.01 14.81 18.62 -14.82 0.01 14.81 0.01 14.81
9/23/2013 19.43 0.00 0.00 19.43 0.69 0.00 0.03 0.00 1.10 0.80 2.63 2.97 2.23 0.00 11.60 5.89 0.03 13.50 19.43 -13.54 0.03 13.50 0.03 13.50
9/24/2013 19.37 0.00 0.00 19.37 0.81 0.00 0.04 0.00 1.28 1.05 3.17 1.93 2.28 0.00 11.99 5.02 0.04 14.31 19.37 -14.35 0.04 14.31 0.04 14.31
9/25/2013 21.41 0.00 0.00 21.41 1.04 0.00 0.02 0.00 2.52 0.86 4.44 2.39 2.28 0.00 12.30 5.71 0.02 15.68 21.41 -15.70 0.02 15.68 0.02 15.68
9/26/2013 22.38 0.00 0.00 22.38 1.54 0.00 0.06 0.00 3.05 1.01 5.65 2.36 2.32 0.00 12.04 6.22 0.06 16.10 22.38 -16.16 0.06 16.10 0.06 16.10
9/27/2013 22.72 0.00 0.00 22.72 1.52 0.00 0.06 0.00 3.18 0.98 5.74 2.37 2.33 0.00 12.29 6.22 0.06 16.44 22.72 -16.50 0.06 16.44 0.06 16.44
9/28/2013 19.98 0.00 0.00 19.98 1.25 0.00 0.06 0.00 2.05 1.09 4.45 1.58 2.25 0.00 11.70 5.09 0.06 14.84 19.98 -14.89 0.06 14.84 0.06 14.84
9/29/2013 22.97 0.00 0.00 22.97 1.45 0.00 0.05 0.00 3.11 0.95 5.56 2.64 2.35 0.00 12.41 6.44 0.05 16.48 22.97 -16.53 0.05 16.48 0.05 16.48
9/30/2013 19.86 0.00 0.00 19.86 0.97 0.00 0.04 0.00 1.94 0.94 3.90 1.30 2.40 0.00 12.26 4.68 0.04 15.14 19.86 -15.18 0.04 15.14 0.04 15.14
10/1/2013 22.09 0.00 0.00 22.09 1.58 0.00 0.07 0.00 2.92 1.13 5.70 2.15 2.34 0.00 11.91 6.07 0.07 15.95 22.09 -16.02 0.07 15.95 0.07 15.95
10/2/2013 23.96 0.00 0.00 23.96 2.02 0.00 0.07 0.00 4.59 1.07 7.74 1.84 2.35 0.00 12.03 6.21 0.07 17.69 23.96 -17.75 0.07 17.69 0.07 17.69
10/3/2013 23.14 0.00 0.00 23.14 2.01 0.00 0.09 0.00 3.52 1.02 6.64 1.96 2.39 0.00 12.15 6.36 0.09 16.69 23.14 -16.78 0.09 16.69 0.09 16.69
10/4/2013 23.52 0.00 0.00 23.52 1.79 0.00 0.06 0.00 4.10 0.98 6.93 1.97 2.51 0.00 12.11 6.27 0.06 17.20 23.52 -17.25 0.06 17.20 0.06 17.20
10/5/2013 23.08 0.00 0.00 23.08 1.45 0.00 0.04 0.00 3.51 1.10 6.10 2.33 2.35 0.00 12.29 6.13 0.04 16.91 23.08 -16.95 0.04 16.91 0.04 16.91
10/6/2013 23.15 0.00 0.00 23.15 1.63 0.00 0.06 0.00 3.60 0.98 6.27 2.00 2.40 0.00 12.48 6.03 0.06 17.06 23.15 -17.12 0.06 17.06 0.06 17.06
10/7/2013 18.39 0.00 0.00 18.39 0.57 0.00 0.02 0.00 1.15 0.84 2.59 2.09 2.19 0.00 11.52 4.85 0.02 13.52 18.39 -13.54 0.02 13.52 0.02 13.52
10/8/2013 18.50 0.00 0.00 18.50 0.54 0.00 0.02 0.00 1.13 0.83 2.53 2.40 2.16 0.00 11.41 5.11 0.02 13.37 18.50 -13.39 0.02 13.37 0.02 13.37
10/9/2013 18.88 0.00 0.00 18.88 0.52 0.00 0.01 0.00 1.25 0.79 2.56 1.86 2.35 0.00 12.11 4.72 0.01 14.14 18.88 -14.16 0.01 14.14 0.01 14.14
10/10/2013 18.77 0.00 0.00 18.77 0.67 0.00 0.03 0.00 1.25 0.82 2.76 2.02 2.30 0.00 11.68 4.99 0.03 13.75 18.77 -13.78 0.03 13.75 0.03 13.75
10/11/2013 18.91 0.00 0.00 18.91 0.45 0.00 0.01 0.00 1.08 0.73 2.27 2.87 2.29 0.00 11.47 5.61 0.01 13.29 18.91 -13.30 0.01 13.29 0.01 13.29
10/12/2013 19.32 0.00 0.00 19.32 0.64 0.00 0.03 0.00 1.22 0.81 2.70 2.71 2.25 0.00 11.66 5.60 0.03 13.69 19.32 -13.72 0.03 13.69 0.03 13.69
10/13/2013 17.72 0.00 0.00 17.72 0.40 0.00 0.01 0.00 0.98 0.75 2.14 1.85 2.20 0.00 11.53 4.46 0.01 13.26 17.72 -13.26 0.01 13.26 0.01 13.26
10/14/2013 17.58 0.00 0.00 17.58 0.50 0.00 0.02 0.00 1.16 0.77 2.44 1.12 2.22 0.00 11.79 3.84 0.02 13.72 17.58 -13.74 0.02 13.72 0.02 13.72
10/15/2013 19.11 0.00 0.00 19.11 0.69 0.00 0.03 0.00 1.19 0.84 2.76 2.89 2.15 0.00 11.31 5.73 0.03 13.35 19.11 -13.38 0.03 13.35 0.03 13.35
10/16/2013 19.02 0.00 0.00 19.02 0.65 0.00 0.03 0.00 1.30 0.81 2.79 1.74 2.25 0.00 12.24 4.64 0.03 14.36 19.02 -14.38 0.03 14.36 0.03 14.36
10/17/2013 18.99 0.00 0.00 18.99 0.81 0.00 0.04 0.00 1.36 0.86 3.06 1.79 2.28 0.00 11.86 4.88 0.04 14.07 18.99 -14.11 0.04 14.07 0.04 14.07
10/18/2013 20.43 0.00 0.00 20.43 1.16 0.00 0.06 0.00 1.53 0.76 3.51 2.71 2.29 0.00 11.92 6.17 0.06 14.20 20.43 -14.26 0.06 14.20 0.06 14.20
10/19/2013 19.40 0.00 0.00 19.40 0.78 0.00 0.03 0.00 1.40 0.88 3.10 1.88 2.31 0.00 12.11 4.97 0.03 14.40 19.40 -14.43 0.03 14.40 0.03 14.40
10/20/2013 18.18 0.00 0.00 18.18 1.59 0.00 0.01 0.00 3.88 0.77 6.25 1.28 2.37 0.00 8.28 5.24 0.01 12.93 18.18 -12.94 0.01 12.93 0.01 12.93
10/21/2013 18.72 0.00 0.00 18.72 0.59 0.00 0.02 0.00 1.25 0.75 2.61 1.86 2.34 0.00 11.92 4.78 0.02 13.92 18.72 -13.94 0.02 13.92 0.02 13.92
Page 7 of 9
(3) (4) (5) (7)=3+4+5 (8) (9) (10) (11) (12) (13)
L=8+9+10
+11+12+1
3 (14) (15) (17) (16)
(18)=8+9+
14+15
R=10+11+
17
19=12+13
+16
T=18+R+
19 (21)=18-3 (22)=R
(23)=19-4-
5 (24)=22 (25)=23
Water Withdrawal/Purchase (mgd) Consumptive Use (mgd) Water Use Discharged as Wastewater (mgd) Total Returned/Used in Each Basin (mgd) Net Basin Gain(+)/Loss(-) (mgd)
Interbasin Transfer
(mgd)
Jordan Lake
Withdrawal
Neuse Basin
Purchase
Total
System
Use Haw Cape Fear Neuse Total Haw Cape Fear Neuse Haw Cape Fear Neuse
Total- All
Basins Haw Cape Fear Neuse
Haw to
Cape Fear
Haw to
Neuse
DATE Haw Raleigh Durham Potable
WRF
Reuse Potable
WRF
Reuse Potable
WRF
Reuse
WTP
Process
Water WRF WRF
Total
WRFs
10/22/2013 18.92 0.00 0.00 18.92 0.71 0.00 0.03 0.00 1.21 0.93 2.89 2.71 2.15 0.00 11.17 5.58 0.03 13.31 18.92 -13.34 0.03 13.31 0.03 13.31
10/23/2013 19.58 0.00 0.00 19.58 0.94 0.00 0.05 0.00 1.53 0.90 3.42 1.60 2.28 0.00 12.28 4.82 0.05 14.71 19.58 -14.76 0.05 14.71 0.05 14.71
10/24/2013 19.90 0.00 0.00 19.90 0.77 0.00 0.02 0.00 1.84 0.91 3.54 1.90 2.31 0.00 12.15 4.97 0.02 14.90 19.90 -14.93 0.02 14.90 0.02 14.90
10/25/2013 18.86 0.00 0.00 18.86 0.43 0.00 0.01 0.00 1.05 0.78 2.27 2.48 2.24 0.00 11.87 5.15 0.01 13.70 18.86 -13.71 0.01 13.70 0.01 13.70
10/26/2013 18.45 0.00 0.00 18.45 0.52 0.00 0.02 0.00 1.19 0.87 2.59 1.68 2.19 0.00 11.99 4.39 0.02 14.05 18.45 -14.06 0.02 14.05 0.02 14.05
10/27/2013 18.56 0.00 0.00 18.56 0.48 0.00 0.01 0.00 1.17 0.77 2.42 1.34 2.29 0.00 12.51 4.11 0.01 14.44 18.56 -14.45 0.01 14.44 0.01 14.44
10/28/2013 18.94 0.00 0.00 18.94 0.49 0.00 0.01 0.00 1.19 0.84 2.53 1.93 2.26 0.00 12.22 4.68 0.01 14.25 18.94 -14.26 0.01 14.25 0.01 14.25
10/29/2013 19.75 0.00 0.00 19.75 0.50 0.00 0.01 0.00 1.20 1.02 2.73 2.44 2.23 0.00 12.35 5.16 0.01 14.58 19.75 -14.59 0.01 14.58 0.01 14.58
10/30/2013 18.54 0.00 0.00 18.54 0.67 0.00 0.03 0.00 1.28 0.89 2.87 1.27 2.20 0.00 12.20 4.13 0.03 14.38 18.54 -14.41 0.03 14.38 0.03 14.38
10/31/2013 20.31 0.00 0.00 20.31 0.71 0.00 0.03 0.00 1.38 0.95 3.07 2.94 2.30 0.00 12.00 5.95 0.03 14.33 20.31 -14.36 0.03 14.33 0.03 14.33
11/1/2013 18.41 0.00 0.00 18.41 0.49 0.00 0.01 0.00 1.19 0.85 2.54 1.43 2.05 0.00 12.39 3.97 0.01 14.44 18.41 -14.44 0.01 14.44 0.01 14.44
11/2/2013 16.80 0.00 0.00 16.80 0.37 0.00 0.01 0.00 0.91 0.73 2.02 1.72 2.11 0.00 10.95 4.20 0.01 12.59 16.80 -12.60 0.01 12.59 0.01 12.59
11/3/2013 17.70 0.00 0.00 17.70 0.39 0.00 0.01 0.00 0.95 0.75 2.10 2.32 1.96 0.00 11.32 4.68 0.01 13.02 17.70 -13.02 0.01 13.02 0.01 13.02
11/4/2013 17.67 0.00 0.00 17.67 0.45 0.00 0.01 0.00 1.09 0.75 2.31 1.89 2.14 0.00 11.33 4.48 0.01 13.18 17.67 -13.19 0.01 13.18 0.01 13.18
11/5/2013 17.63 0.00 0.00 17.63 0.41 0.00 0.01 0.00 1.01 0.84 2.26 2.16 1.97 0.00 11.23 4.55 0.01 13.08 17.63 -13.08 0.01 13.08 0.01 13.08
11/6/2013 17.38 0.00 0.00 17.38 0.57 0.00 0.02 0.00 1.12 0.84 2.54 1.76 2.02 0.00 11.06 4.35 0.02 13.01 17.38 -13.03 0.02 13.01 0.02 13.01
11/7/2013 18.95 0.00 0.00 18.95 0.49 0.00 0.01 0.00 1.17 0.76 2.43 2.97 2.15 0.00 11.40 5.61 0.01 13.33 18.95 -13.34 0.01 13.33 0.01 13.33
11/8/2013 18.23 0.00 0.00 18.23 0.83 0.00 0.04 0.00 1.35 0.71 2.93 1.74 2.20 0.00 11.35 4.77 0.04 13.42 18.23 -13.46 0.04 13.42 0.04 13.42
11/9/2013 17.31 0.00 0.00 17.31 0.48 0.00 0.02 0.00 1.04 0.81 2.35 2.22 2.19 0.00 10.54 4.89 0.02 12.40 17.31 -12.42 0.02 12.40 0.02 12.40
11/10/2013 17.07 0.00 0.00 17.07 0.48 0.00 0.02 0.00 1.10 0.78 2.38 1.38 1.91 0.00 11.40 3.76 0.02 13.29 17.07 -13.31 0.02 13.29 0.02 13.29
11/11/2013 17.90 0.00 0.00 17.90 0.44 0.00 0.01 0.00 1.07 0.78 2.30 1.97 1.96 0.00 11.67 4.37 0.01 13.52 17.90 -13.53 0.01 13.52 0.01 13.52
11/12/2013 18.77 0.00 0.00 18.77 0.74 0.00 0.03 0.00 1.35 0.80 2.92 2.04 2.12 0.00 11.68 4.91 0.03 13.83 18.77 -13.86 0.03 13.83 0.03 13.83
11/13/2013 16.83 0.00 0.00 16.83 0.41 0.00 0.01 0.00 0.99 0.72 2.13 1.92 1.96 0.00 10.82 4.29 0.01 12.53 16.83 -12.54 0.01 12.53 0.01 12.53
11/14/2013 16.97 0.00 0.00 16.97 0.52 0.00 0.02 0.00 1.04 0.72 2.30 2.02 1.95 0.00 10.70 4.49 0.02 12.46 16.97 -12.48 0.02 12.46 0.02 12.46
11/15/2013 17.06 0.00 0.00 17.06 0.42 0.00 0.01 0.00 1.01 0.69 2.13 1.96 2.04 0.00 10.93 4.41 0.01 12.64 17.06 -12.65 0.01 12.64 0.01 12.64
11/16/2013 16.88 0.00 0.00 16.88 0.36 0.00 0.01 0.00 0.87 0.71 1.95 2.57 1.80 0.00 10.55 4.73 0.01 12.14 16.88 -12.15 0.01 12.14 0.01 12.14
11/17/2013 17.01 0.00 0.00 17.01 0.49 0.00 0.02 0.00 0.99 0.69 2.19 2.09 1.99 0.00 10.74 4.57 0.02 12.42 17.01 -12.44 0.02 12.42 0.02 12.42
11/18/2013 16.80 0.00 0.00 16.80 0.41 0.00 0.01 0.00 0.98 0.67 2.07 1.85 2.18 0.00 10.71 4.43 0.01 12.36 16.80 -12.37 0.01 12.36 0.01 12.36
11/19/2013 17.11 0.00 0.00 17.11 0.37 0.00 0.01 0.00 0.91 0.69 1.98 2.35 2.05 0.00 10.73 4.78 0.01 12.33 17.11 -12.33 0.01 12.33 0.01 12.33
11/20/2013 16.39 0.00 0.00 16.39 0.40 0.00 0.01 0.00 0.96 0.68 2.05 1.79 1.98 0.00 10.57 4.17 0.01 12.21 16.39 -12.22 0.01 12.21 0.01 12.21
11/21/2013 16.19 0.00 0.00 16.19 0.34 0.00 0.01 0.00 0.84 0.71 1.89 1.99 1.97 0.00 10.34 4.30 0.01 11.88 16.19 -11.89 0.01 11.88 0.01 11.88
11/22/2013 16.88 0.00 0.00 16.88 0.39 0.00 0.01 0.00 0.94 0.70 2.03 2.19 1.97 0.00 10.68 4.55 0.01 12.32 16.88 -12.33 0.01 12.32 0.01 12.32
11/23/2013 16.48 0.00 0.00 16.48 0.53 0.00 0.02 0.00 0.96 0.65 2.17 1.97 1.92 0.00 10.42 4.42 0.02 12.04 16.48 -12.06 0.02 12.04 0.02 12.04
11/24/2013 16.77 0.00 0.00 16.77 0.39 0.00 0.01 0.00 0.96 0.70 2.05 1.56 2.12 0.00 11.03 4.08 0.01 12.69 16.77 -12.69 0.01 12.69 0.01 12.69
11/25/2013 17.18 0.00 0.00 17.18 0.40 0.00 0.01 0.00 0.96 0.64 2.00 1.99 2.18 0.00 11.01 4.56 0.01 12.61 17.18 -12.62 0.01 12.61 0.01 12.61
11/26/2013 16.86 0.00 0.00 16.86 0.36 0.00 0.01 0.00 0.87 0.59 1.82 2.34 1.78 0.00 10.92 4.47 0.01 12.38 16.86 -12.39 0.01 12.38 0.01 12.38
11/27/2013 14.88 0.00 0.00 14.88 0.29 0.00 0.01 0.00 0.71 0.52 1.53 1.47 1.68 0.00 10.21 3.44 0.01 11.44 14.88 -11.44 0.01 11.44 0.01 11.44
11/28/2013 16.12 0.00 0.00 16.12 0.29 0.00 0.01 0.00 0.69 0.54 1.53 2.84 1.99 0.00 9.76 5.12 0.01 10.99 16.12 -11.00 0.01 10.99 0.01 10.99
11/29/2013 15.90 0.00 0.00 15.90 0.33 0.00 0.01 0.00 0.81 0.57 1.72 2.03 1.88 0.00 10.27 4.24 0.01 11.65 15.90 -11.66 0.01 11.65 0.01 11.65
11/30/2013 14.98 0.00 0.00 14.98 0.29 0.00 0.01 0.00 0.69 0.58 1.56 1.62 1.80 0.00 10.00 3.71 0.01 11.27 14.98 -11.27 0.01 11.27 0.01 11.27
12/1/2013 15.29 0.00 0.00 15.29 0.25 0.00 0.01 0.00 0.62 0.60 1.47 1.55 1.89 0.00 10.38 3.69 0.01 11.59 15.29 -11.60 0.01 11.59 0.01 11.59
12/2/2013 15.77 0.00 0.00 15.77 0.26 0.00 0.01 0.00 0.64 0.65 1.56 1.99 1.93 0.00 10.29 4.19 0.01 11.58 15.77 -11.58 0.01 11.58 0.01 11.58
Page 8 of 9
(3) (4) (5) (7)=3+4+5 (8) (9) (10) (11) (12) (13)
L=8+9+10
+11+12+1
3 (14) (15) (17) (16)
(18)=8+9+
14+15
R=10+11+
17
19=12+13
+16
T=18+R+
19 (21)=18-3 (22)=R
(23)=19-4-
5 (24)=22 (25)=23
Water Withdrawal/Purchase (mgd) Consumptive Use (mgd) Water Use Discharged as Wastewater (mgd) Total Returned/Used in Each Basin (mgd) Net Basin Gain(+)/Loss(-) (mgd)
Interbasin Transfer
(mgd)
Jordan Lake
Withdrawal
Neuse Basin
Purchase
Total
System
Use Haw Cape Fear Neuse Total Haw Cape Fear Neuse Haw Cape Fear Neuse
Total- All
Basins Haw Cape Fear Neuse
Haw to
Cape Fear
Haw to
Neuse
DATE Haw Raleigh Durham Potable
WRF
Reuse Potable
WRF
Reuse Potable
WRF
Reuse
WTP
Process
Water WRF WRF
Total
WRFs
12/3/2013 17.06 0.00 0.00 17.06 0.31 0.00 0.01 0.00 0.74 0.73 1.80 2.62 1.85 0.00 10.79 4.78 0.01 12.27 17.06 -12.28 0.01 12.27 0.01 12.27
12/4/2013 17.09 0.00 0.00 17.09 0.34 0.00 0.01 0.00 0.82 0.75 1.92 1.89 1.76 0.00 11.52 3.99 0.01 13.10 17.09 -13.10 0.01 13.10 0.01 13.10
12/5/2013 17.01 0.00 0.00 17.01 0.37 0.00 0.01 0.00 0.82 0.70 1.91 2.08 1.27 0.00 11.75 3.72 0.01 13.27 17.01 -13.29 0.01 13.27 0.01 13.27
12/6/2013 15.30 0.00 0.00 15.30 0.24 0.00 0.01 0.00 0.58 0.78 1.61 1.99 1.77 0.00 9.93 4.00 0.01 11.30 15.30 -11.30 0.01 11.30 0.01 11.30
12/7/2013 15.42 0.00 0.00 15.42 0.24 0.00 0.01 0.00 0.58 0.76 1.58 2.19 1.69 0.00 9.95 4.12 0.01 11.29 15.42 -11.30 0.01 11.29 0.01 11.29
12/8/2013 16.07 0.00 0.00 16.07 0.28 0.00 0.01 0.00 0.67 0.70 1.65 2.04 1.75 0.00 10.63 4.07 0.01 12.00 16.07 -12.00 0.01 12.00 0.01 12.00
12/9/2013 16.15 0.00 0.00 16.15 0.30 0.00 0.01 0.00 0.72 0.69 1.72 1.80 1.84 0.00 10.80 3.93 0.01 12.21 16.15 -12.22 0.01 12.21 0.01 12.21
12/10/2013 16.75 0.00 0.00 16.75 0.30 0.00 0.01 0.00 0.72 0.74 1.77 2.04 1.71 0.00 11.23 4.05 0.01 12.70 16.75 -12.70 0.01 12.70 0.01 12.70
12/11/2013 15.65 0.00 0.00 15.65 0.27 0.00 0.01 0.00 0.66 0.73 1.68 1.78 1.61 0.00 10.58 3.67 0.01 11.98 15.65 -11.98 0.01 11.98 0.01 11.98
12/12/2013 16.14 0.00 0.00 16.14 0.27 0.00 0.01 0.00 0.65 0.73 1.65 2.21 1.29 0.00 10.99 3.76 0.01 12.37 16.14 -12.38 0.01 12.37 0.01 12.37
12/13/2013 16.25 0.00 0.00 16.25 0.31 0.00 0.01 0.00 0.75 0.70 1.76 1.66 1.92 0.00 10.90 3.89 0.01 12.35 16.25 -12.36 0.01 12.35 0.01 12.35
12/14/2013 15.85 0.00 0.00 15.85 0.29 0.00 0.01 0.00 0.71 0.72 1.73 1.49 1.67 0.00 10.96 3.46 0.01 12.39 15.85 -12.39 0.01 12.39 0.01 12.39
12/15/2013 15.98 0.00 0.00 15.98 0.23 0.00 0.01 0.00 0.53 0.72 1.49 2.57 1.80 0.00 10.12 4.60 0.01 11.38 15.98 -11.38 0.01 11.38 0.01 11.38
12/16/2013 16.04 0.00 0.00 16.04 0.28 0.00 0.01 0.00 0.69 0.73 1.70 2.13 1.87 0.00 10.33 4.29 0.01 11.75 16.04 -11.75 0.01 11.75 0.01 11.75
12/17/2013 16.40 0.00 0.00 16.40 0.29 0.00 0.01 0.00 0.70 0.77 1.77 1.96 1.41 0.00 11.27 3.66 0.01 12.74 16.40 -12.74 0.01 12.74 0.01 12.74
12/18/2013 15.98 0.00 0.00 15.98 0.59 0.00 0.03 0.00 0.83 0.76 2.21 1.29 0.71 0.00 11.77 2.59 0.03 13.36 15.98 -13.39 0.03 13.36 0.03 13.36
12/19/2013 17.10 0.00 0.00 17.10 0.41 0.00 0.02 0.00 0.77 0.74 1.94 2.34 1.20 0.00 11.62 3.95 0.02 13.13 17.10 -13.15 0.02 13.13 0.02 13.13
12/20/2013 17.54 0.00 0.00 17.54 0.52 0.00 0.02 0.00 0.94 0.75 2.24 1.85 2.06 0.00 11.40 4.43 0.02 13.09 17.54 -13.11 0.02 13.09 0.02 13.09
12/21/2013 16.29 0.00 0.00 16.29 0.25 0.00 0.01 0.00 0.60 0.74 1.59 2.85 1.77 0.00 10.08 4.87 0.01 11.41 16.29 -11.42 0.01 11.41 0.01 11.41
12/22/2013 15.94 0.00 0.00 15.94 0.29 0.00 0.01 0.00 0.72 0.76 1.78 1.63 1.84 0.00 10.70 3.76 0.01 12.17 15.94 -12.18 0.01 12.17 0.01 12.17
12/23/2013 16.14 0.00 0.00 16.14 0.29 0.00 0.01 0.00 0.70 0.76 1.76 1.45 1.62 0.00 11.31 3.36 0.01 12.78 16.14 -12.78 0.01 12.78 0.01 12.78
12/24/2013 16.04 0.00 0.00 16.04 0.27 0.00 0.01 0.00 0.65 0.76 1.68 2.15 1.77 0.00 10.44 4.19 0.01 11.85 16.04 -11.85 0.01 11.85 0.01 11.85
12/25/2013 15.15 0.00 0.00 15.15 0.20 0.00 0.01 0.00 0.49 0.72 1.43 2.53 1.74 0.00 9.46 4.47 0.01 10.67 15.15 -10.68 0.01 10.67 0.01 10.67
12/26/2013 14.84 0.00 0.00 14.84 0.20 0.00 0.01 0.00 0.48 0.73 1.42 2.33 1.54 0.00 9.55 4.07 0.01 10.77 14.84 -10.77 0.01 10.77 0.01 10.77
12/27/2013 15.05 0.00 0.00 15.05 0.25 0.00 0.01 0.00 0.61 0.76 1.62 1.63 1.50 0.00 10.30 3.38 0.01 11.66 15.05 -11.67 0.01 11.66 0.01 11.66
12/28/2013 14.66 0.00 0.00 14.66 0.21 0.00 0.01 0.00 0.50 0.76 1.47 1.89 1.37 0.00 9.93 3.46 0.01 11.19 14.66 -11.20 0.01 11.19 0.01 11.19
12/29/2013 14.84 0.00 0.00 14.84 0.21 0.00 0.01 0.00 0.51 0.81 1.53 2.26 1.17 0.00 9.88 3.63 0.01 11.20 14.84 -11.21 0.01 11.20 0.01 11.20
12/30/2013 15.21 0.00 0.00 15.21 0.24 0.00 0.01 0.00 0.58 0.80 1.63 1.63 1.53 0.00 10.42 3.40 0.01 11.81 15.21 -11.81 0.01 11.81 0.01 11.81
12/31/2013 16.68 0.00 0.00 16.68 0.28 0.00 0.01 0.00 0.68 0.76 1.72 2.07 1.85 0.00 11.04 4.20 0.01 12.47 16.68 -12.48 0.01 12.47 0.01 12.47
Page 9 of 9
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2013 ANNUAL REPORT ON INTERBASIN TRANSFERS for RTP South and the Towns of Cary, Apex, and Morrisville
C-1 2-1 1

Appendix C:
Towns of Cary and Apex Water Shortage Response Plans
Updated for 2013

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Water Shortage Response Plan ADOPTED June 10 2009 REVISED Jan 21 2010 Page 1 of 10 Effective July 1, 2009

Town of Cary
Water Shortage Response Plan

Prepared by: Leila Goodwin, P.E., Water Resources Manager and Marie Cefalo, Water
Conservation Coordinator
Supersedes: 5/10/2007
Approved by Council: 6/10/2009
Effective: July 1, 2009
Modified January 21, 2010

Purpose: To establish measures and procedures for reducing potable water use during
times of water shortage.

In 1996 the Town established a comprehensive water conservation program designed
to effectively manage Cary’s long term water resources. The established goals for the
program are to support the high quality of life in Cary by providing safe, reliable water
service, while reducing per capita use of potable water, conserve a limited natural
resource, and reduce the costs of infrastructure expansion. To achieve these goals the
comprehensive water conservation program includes regulatory, educational, and
financial incentive components. The regulatory component primarily consists of three
year-round water conservation ordinances: Section 36-80, Water Service Provided by
Town Includes only Alternate Day Outdoor Irrigation; Section 36-83, Waste While
Watering Ordinance, 36-84 Rain Sensor Ordinance. There are also irrigation system
design requirements included in the Land Development Ordinance. The fundamental
educational initiatives are school lessons; the annual Beat the Peak Campaign, The
Block Leader Program, and the Town’s Web pages. The primary financial incentive is
the Town’s tiered rate structure.
In contrast to Cary’s long-term water conservation program, the purpose of this Water
Shortage Response Plan (WSRP) is to deal with short-term or immediate water
shortage, which may be caused by things such as drought, water quality problems, or
disruptions in facility operations. The Town of Cary has been required by the state to
have a WSRP since 2001 by both our Jordan Lake Allocation water supply contract and
our interbasin transfer certificate. More recently, as of July 1, 2009 all public and
privately owned water systems subject to GS 143-355 (l) are required to have an
approved WSRP as part of their Local Water Supply Plan (LWSP). Rules governing
water use during droughts and water emergencies (15A NCAC 02E. 0607) stipulate
specific items that must be included in those plans. This WSRP was developed in
accordance with the Water Shortage Response Plan Guidelines provided by the
Division of Water Resources (January 2009).
I. Authorization
The Cary Town Manager, and in his or her absence the Assistant Town Manager, is
authorized by Section 36-81 of the Town Code of Ordinances to declare a Water
Shortage and to enact water shortage response provisions. References in this
Water Shortage Response Plan ADOPTED June 10 2009 REVISED Jan 21 2010 Page 2 of 10 Effective July 1, 2009

document to the Town Manager apply to the Assistant Town Manager in the Town
Manager’s absence.
II. Notification
Once a Water Shortage has been declared, and whenever the Water Shortage
Response Stage (defined in Section IV below) changes, the following notifications will
be made:
1. A notice of the effective date of the declaration and the current water use reduction
state will be posted at Town Hall.
2. The Town Manager (or designee) notifies the Mayor, Town Council, neighboring
municipal contract water recipients, and town government departments.
3. The Public Information Officer (or designee) will contact the media. The media,
including television, print, internet, and radio, will inform the public. Contact
information for the Public Works & Utilities Department will be provided for additional
information needed by the public.
4. The Public Information Officer (or designee) will update the Town’s Web site with the
Water Shortage status.
5. The Public Works & Utilities Director (or designee) will contact Finance Customer
Service and the Water Distribution System Operator, and distribute a general e-mail
so Town employees can help provide accurate information to the public.
6. Finance Customer Service will contact major water customers (both irrigation and
water accounts) and inform them of the implemented measures.
7. The Water Distribution System Operator will contact the police communications
center, and coordinate with bulk users.
8. The Town will directly notify both residential and non-residential customers of water
restrictions via mail and/or e-mail when a water shortage is declared and when a
new more restrictive stage is implemented. In addition, Town staff will email the
information to irrigation contractors listed on a notification list maintained by water
conservation program staff.
9. Water conservation staff will provide PWUT field employees with handouts to give
customers who ask them questions as they work throughout the community.
During drought periods when declaration of a water shortage appears likely, the Town
will keep customers informed of the potential for declaring a water shortage, and will
provide information to customers via public service announcements and the Web site
about measures they can take to reduce water use and, potentially, avoid a water
shortage situation.
III. Drought Contingency Plans for Non-residential Customers
Non-residential customers are encouraged to prepare for a water shortage by
determining the measures they would implement to meet the requirements of the Water
Water Shortage Response Plan ADOPTED June 10 2009 REVISED Jan 21 2010 Page 3 of 10 Effective July 1, 2009

Shortage Response stages described in Section IV. This can be accomplished by
developing a Drought Contingency Plan during normal water supply conditions before
there is a water shortage situation. Customers who use relatively large amounts of
potable water and/or use potable water for public health purposes (e.g. hospitals or
assisted living facilities) are especially encouraged to develop a Drought Contingency
Plan well in advance of a potential water shortage situation. Resources available for
assistance with developing a plan include the NCDENR Division of Pollution Prevention,
which published the “Water Efficiency Manual for Commercial, Industrial and
Institutional Facilities” in May 2009, and Waste Reduction Partners. The manual and
more information are available at www.p2pays.org, or call [phone] or (800) 763-
0136.
If, after developing a Drought Contingency Plan, a customer believes that meeting the
default water use reduction requirements will compromise public health and safety or
cause extreme hardship, the customer can submit a Drought Contingency Plan as
described below to the Town’s Water Conservation Program Coordinator (or designee)
for approval. An approved Drought Contingency Plan can then be used – and must be
followed - in lieu of meeting the default requirements included in Section IV for non-
residential customers.
To be considered for approval a Drought Contingency Plan must include:
1. Estimated amount of potable water use per day, during both an average winter month
and an average summer month, for different purposes including drinking water, basic
sanitation, process water, irrigation, and other major uses specific to the customer
2. Description of any alternate water sources available
3. Description of existing high-efficiency fixtures, technologies, hardware, management
practices, or other measures in use to reduce water use.
4. Measures that would be taken during each Water Shortage Response stage in order
to meet the requirements in Section IV.
5. Description of the impact to the customer or to the public (e.g. reduced production,
reduction of business hours, employee impacts, structural damage, etc.) of meeting the
water use reduction requirements.
6. Proposed alternative measures to be taken during each Water Shortage Response
stage, and the resulting expected reduction in water use for the categories listed in item
1, under both average winter and average summer conditions.
Non-residential customers with an approved Drought Contingency Plan must resubmit
their plan for approval every five years, or sooner if there is a significant change in water
use or other conditions which would alter the plan’s effectiveness.
IV. Water Shortage Response Stages
Four water shortage response stages, intended to achieve system-wide water use
reduction, are described below and summarized in Table 1. Before Stage 1 is
implemented, the Town will communicate to each customer a summary of the
Water Shortage Response Plan ADOPTED June 10 2009 REVISED Jan 21 2010 Page 4 of 10 Effective July 1, 2009

customer’s historical water use, their normal Tier 1 indoor water use, and information on
how much water can be saved with different water use reduction measures.
Non-residential customers who have an approved Drought Contingency Plan must
reduce water use during each stage as specified in their plan.
Stage 1
Spray irrigation using potable water is limited to one (1) day per week for all purposes
except the maintenance of athletic fields. No new turf watering exemption permits will
be issued and any existing permits for watering periods that begin later than 14 days
after the effective date of Stage 1 will be rescinded. Hand watering, drip irrigation, and
subsurface irrigation are still allowed. Other outdoor water uses such as pressure
washing, car washing, and keeping swimming pools filled are allowed, although
customers are strongly encouraged to minimize such uses.
Stage 2
Spray irrigation using potable water is not allowed for any purpose except the
maintenance of athletic fields. No new turf watering exemption permits will be issued,
and any previously issued exemption permits for watering periods that have not expired
will be rescinded. Hand watering, drip irrigation, and subsurface irrigation are still
allowed. Other outdoor water uses such as pressure washing, car washing, and
keeping swimming pools filled are allowed, although customers are strongly encouraged
to minimize such uses.
Stage 3
No outdoor water use with potable water is allowed, including but not limited to: spray
irrigation, hand watering, drip irrigation, and subsurface irrigation, ornamental fountains,
car washing, pressure washing, and keeping swimming pools filled. No new turf
watering exemption permits will be issued and any previously issued permits for
watering periods that have not expired will be rescinded. Firefighting and utility system
maintenance are the only allowable outdoor water uses.
All customers are required to limit their monthly water use to the amount they normally
use during the winter within Tier 1. This amount will be provided to each customer by
the Public Works and Utilities Department, based on the water use history for their
account, well in advance of Stage 3 implementation. For example, if during the winter a
residential customer uses 4,000 gallons per month, then 4,000 gallons per month will be
their normal Tier 1 indoor water use; if a customer normally uses 6,000 gallons per
month in the winter - 5,000 Tier 1 and 1,000 Tier 2 – then their normal Tier 1 indoor
water use will be 5,000 gallons per month. The approach will be the same for non-
residential customers even though the maximum number of gallons based on the
threshold between Tier 1 and Tier 2 varies for individual customers.
Rationing
In this stage, the goal is to ensure there is drinking water available to protect public
health (e.g., health care, drinking water, basic sanitation). Customers are encouraged
to use the minimum amount of water needed for public health protection. No outdoor
Water Shortage Response Plan ADOPTED June 10 2009 REVISED Jan 21 2010 Page 5 of 10 Effective July 1, 2009

water use with potable water is allowed, including but not limited to: spray irrigation,
hand watering, drip irrigation, and subsurface irrigation, ornamental fountains, car
washing, pressure washing, and keeping swimming pools filled. As in Stage 3, no new
turf watering exemption permits will be issued and any previously issued permits for
watering periods that have not expired will be rescinded. Firefighting and utility system
maintenance are the only allowable outdoor water uses.
All customers are required to reduce their normal Tier 1 indoor water use, calculated as
defined above in Stage 3, by 15%.
Table 1: Water Shortage Response Stage Summary
Water Shortage Response Stages Year-round
Water
Conservation
Program
Stage 1 Stage 2 Stage 3 Rationing
Outdoor Spray
Irrigation
Three days per
week
One day per
week
None None None
Hand watering, drip
irrigation, subsurface
irrigation, athletic
field maintenance
Allowed Allowed Allowed None None
Other outdoor water
use such as pressure
washing, car washing,
filling/topping off
swimming pools
Allowed Allowed Allowed None None
New Turf Watering
Exception Permits
Allowed No new permits
issued, permits
beginning more
than 14 days
after stage 1 date
rescinded
None None None
Indoor Water Use
Restrictions 1
None None None Limited to
normal Tier 1
indoor use
Reduce
normal Tier
1 indoor use
by 15%
1 Non-residential customers with an approved Drought Contingency Plan will follow the steps in their Plan.

V. Water Shortage Response Triggers for Chronic Conditions
Triggers are conditions which, when reached, cause a water shortage response stage
to be implemented. Triggers are based on the ability to meet water demands and are
influenced by several components of the Town’s water supply system: the water source
(Jordan Lake and/or purchase from others), raw water intake and pipeline, treatment
plant, storage tanks, and distribution system. Town staff and the Town Manager
continually evaluate the status of all these components to determine if a water shortage
condition exists or is approaching.
Water Shortage Response Plan ADOPTED June 10 2009 REVISED Jan 21 2010 Page 6 of 10 Effective July 1, 2009

Cary and Apex have a joint allocation of water supply storage volume in the Jordan
Lake Water Supply Pool equal to 32 percent of the water supply pool or 14,656 acre-
feet (4,778 million gallons). Morrisville holds a water supply storage allocation equal to
3.5 percent of the water supply pool or 1,603 acre-feet (523 million gallons). Wake
County (on behalf of RTP South) holds a water supply storage allocation equal to 3.5
percent of the water supply pool or 1,603 acre-feet (523 million gallons). Cary staff
track the amount of water in storage in each of these water supply allocation pools on a
daily basis, using daily and monthly water use records along with daily lake inflow and
outflow estimates obtained from the US Army Corps of Engineers.
The triggers that would initiate a water shortage declaration from the Town Manager,
and cause changes in the Water Shortage Response Stages as conditions worsen or
improve, are based on the number of days of water supply available to meet potable
water demands. The days of water supply remaining is calculated by dividing the
working supply volume by the moving 30-day average daily demand. The working
supply volume is defined as the amount currently stored, and accessible without
permitting or capital improvements, in the combined Cary/Apex, Morrisville, and Wake
County (for RTP South) Jordan Lake water supply storage allocations. The moving 30-
day average daily demand is the total demand from customers in the Towns of Apex,
Cary, and Morrisville, and RTP South.
Working Supply Volume Days of Supply Remaining = Moving 30-Day Average of Daily Demand

Table 2 describes the triggers for entering the increasing stages of Water Shortage
Response as conditions worsen and the Days of Supply Remaining is declining. The
Director of Public Works and Utilities (or designee) will advise the Town Manager, in
writing, when a trigger has been reached for issuance of a water shortage declaration or
increasing the water shortage response stage. The Manager (or designee) shall then
implement the appropriate water shortage response stage by issuing a declaration to
take effect within 10 days of the date when the trigger was reached. The Town
Manager may, based on other factors (described below), declare a Water Shortage or
implement stages before a trigger is reached (sooner than Table 2 would indicate) if
Days of Supply are declining or other conditions are worsening.
Table 2: Water Shortage Response Triggers for Declining Days of Supply Remaining
Stage Triggers When Days of Supply Remaining is Declining
(Water Shortage
declared)

Stage 1
Days of Supply Remaining is 120 days or less
Stage 1 to Stage 2
Stage 1 has been in place for 28 continuous days
AND
Days of Supply Remaining is 90 days or less
Stage 2 to Stage 3 Days of Supply Remaining is 60 days or less
Stage 3 to
Rationing Days of Supply Remaining is 30 days or less

Water Shortage Response Plan ADOPTED June 10 2009 REVISED Jan 21 2010 Page 7 of 10 Effective July 1, 2009

Table 3 describes the triggers for moving out of Water Shortage Response stages as
conditions improve and the Days of Supply Remaining increases. The Director shall
advise the Manager, in writing, when a trigger has been reached for decreasing a water
shortage response stage or ending a water shortage declaration. Based on the written
notification that a trigger has been reached, the Manager, in his discretion, may issue a
declaration decreasing the water shortage response stage or ending a water shortage
declaration. Based on other factors (described below), the Manager may elect to move
out of a stage after a trigger is reached (slower than Table 3 would indicate).
Table 3: Water Shortage Response Triggers for Increasing Days of Supply Remaining
Stage Triggers When Days of Supply Remaining is Increasing
Rationing to Stage 3 Days of Supply Remaining has been at least 60 days for at least 14
continuous days
Stage 3 to Stage 2 Days of Supply Remaining has been at least 90 days for at least 14
continuous days
Stage 2 to Stage 1 Days of Supply Remaining has been at least 120 days for at least 14
continuous days
Water Shortage
ended
Jordan Lake Water Supply allocation has been 100% full for at least 14
continuous days

Other factors considered may include but not be limited to:
 Jordan Lake elevation
 US Army Corps of Engineers’ operation of Jordan Lake in drought contingency
mode
 Indications of short or long-term water quality concerns regarding Jordan Lake or
other sources.
 Level of interbasin transfers relative to the Cary/Apex, Morrisville/Wake County
interbasin transfer certificate amount.
 Drought Advisory issued by the NC Drought Management Advisory Council.
 Sudden loss of supplemental water supplies during periods of high demand.
VI. Water Shortage Triggers and Response for Acute Conditions
Events such as contamination, equipment or facility failure, or line breaks require a swift
and immediate response. Examples of conditions that may result in an immediate water
shortage include:
 The occurrence of a major water transmission main break, fire, or any other
emergency that would require high volumes of water, such that demand could
exceed supply.
 Accidental or intentional contamination of the water system.
 Mechanical failure in the water treatment plant or distribution system.
Water Shortage Response Plan ADOPTED June 10 2009 REVISED Jan 21 2010 Page 8 of 10 Effective July 1, 2009

 Inability to distribute water through part of the system.
The following Standard Operating Procedures identify protocols Town staff follow when
these circumstances arise:
OPS #007, De-chlorination Procedure for Water Distribution System Flushing and Main
Break or Reclaimed Water System Main Break
OPS #008, Water Main and Service Line Breaks
OPS # 010, Water Transmission Main Shut Down
OPS #015 Water Main Break by Contractor
OPS #017 Fecal Coliform-E.coli/Contamination Response
In addition, an Emergency Response Plan, kept confidential for security purposes,
identifies detailed procedures to follow should an emergency of that magnitude happen.
Upon recommendation of the Director, the Town Manager may declare a water
shortage and implement any water shortage response stages or other measures as he
or she deems appropriate for any such immediate water shortage situation.
Water Shortage Response Plan ADOPTED June 10 2009 REVISED Jan 21 2010 Page 9 of 10 Effective July 1, 2009

VI. Enforcement
Compliance with the requirements of the Water Shortage Response Plan is required by
the Water Shortage Ordinance (Section 36-81). Penalties are specified annually in the
Budget Ordinance (Operating Budget Fee Schedule, Public Works and Utility Fees).
The Town has Water Conservation Technicians who regularly enforce our year-round
water conservation ordinances, which address outdoor water use and water waste.
During a water shortage, these staff members will continue their enforcement of outdoor
water use restrictions, and other staff members may also be used as needed to achieve
the desired system-wide water use reductions. During a water shortage, in contrast to
during normal times, there will be no warnings before fines are issued for non-
compliance with outdoor water use restrictions, and, the fines are higher than during
normal times. However, the fine for a first-time violation will be deferred and either 1)
waived at the end of the water shortage if there is not a second violation or 2) added to
the fine for a second violation if that occurs.
Reductions in indoor water use are not required in Stages 1 and 2, but the amount of
reductions that may be occurring voluntarily will be evaluated using monthly water billing
usage data. Compliance with the required indoor water use reductions in Stage 3 and
Rationing will be monitored during monthly meter reads at a minimum, and Town staff
will audit water use more often as conditions warrant and/or if expected overall system
water use is not decreasing as needed.
VII. Variance Protocols
The Town recognizes that the requirements for water use reduction in Table 1 may
have significantly more impact on some customers than on others and in some cases
could affect public health and safety. To be considered for a variance, customers may
submit a letter requesting the variance to the Public Works and Utilities Director. The
letter must include an explanation of why the requirements in Table 1 are not
appropriate, cause extreme hardship, or affect health and safety. The letter should
include proposed water use reductions for each stage and an explanation of why they
are more appropriate.
A decision to approve or deny variance requests will be based upon consideration of
criteria including but not limited to: impact on water demand, expected duration of water
shortage, alternative source options, social and economic importance of water use,
purpose of water use (i.e., necessary use of drinking water) and the prevention of
structural damage.
VIII. Expected Effectiveness
The effectiveness of the Town of Cary Water Shortage Response Plan will be
determined by measuring system-wide water use reduction. Variables other than water
use restrictions that may impact reduction goals will be considered. Some of these
include frequency of plan activation, any problem periods without activation, total
number of violation citations, desired reductions attained and evaluation of demand
reductions compared to historical data. Table 4 indicates the potential expected
Water Shortage Response Plan ADOPTED June 10 2009 REVISED Jan 21 2010 Page 10 of 10 Effective July 1, 2009

reduction from normal use for each stage, depending on the time of year, developed
using 2007 customer billing records.
Table 4: Expected Water Use Reductions
Expected Approximate Reductions Relative to Normal Water Use Water Shortage
Response Stage May through October November through April
Stage 1 13% 6%
Stage 2 32% 10%
Stage 3 38% 17%
Rationing 46% 29%

IX. Revision
The WSRP will be reviewed if there are new circumstances affecting water supply and
demand, and following any Water Shortage declaration. The WSRP will be updated If
indicated after a review, or at a minimum every five years as required by the provisions
of GS 143-355 (l) and when our Local Water Supply Plan is updated. The Town of Cary
Public Works and Utilities Director (or designee) is responsible for initiating all WSRP
updates.
X. Public Comment
This WSRP was prepared based on public input received via an on-line survey
(available for one month; 91 participants), emailed comments, and at an Open House
held April 29, 2009. Subsequent revisions of the Water Shortage Response Plan will go
through the normal processes for approval at regular meetings of the Town Operations
Committee and then of the Town Council. The proposed WSRP revisions will be
publicized as part of the meeting agendas.

Town of Apex
Water Shortage Response Plan

June 2009

Prepared by:
Jessica Bolin, PE
John Cratch

and

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II
Table of Contents

Section 1 - Introduction .................................................................................................................. 1-1
Section 2 - Water Supply Assessment ......................................................................................... 2-1
Section 3 - Water Shortage Response Plan ................................................................................. 3-1
3.1 Authority of Plan .............................................................................................................. 3-1
3.2 Plan Activation and Notification Protocol ................................................................... 3-2
3.3 Water Shortage Stages ..................................................................................................... 3-2
3.4 Water Shortage Triggers ................................................................................................. 3-4
3.4.1 Jordan Lake Water Supply Storage Allocation ........................................................ 3-4
3.4.2 Other Factors ................................................................................................................. 3-6
3.5 Enforcement ...................................................................................................................... 3-6
3.6 Variances ........................................................................................................................... 3-6
3.7 Plan Evaluation ................................................................................................................ 3-7
3.8 Plan Revisions ................................................................................................................... 3-7
3.9 Conservation Measures ................................................................................................... 3-8
3.10 Public Comment ............................................................................................................... 3-8

List of Tables
Table 3-1 Water Shortage Response Stage Summary................................................................. 3-4
Table 3-2 Water Shortage Response Triggers for Declining Days of Supply
Remaining ...................................................................................................................... 3-5
Table 3-3 Water Shortage Response Triggers for Increasing Days of Supply
Remaining ...................................................................................................................... 3-5
Table 3-4 Expected Water Use Reductions .................................................................................. 3-7

Attachments
Attachment 1 Town of Apex 2007 Water Usage
Attachment 2 Town of Apex 2008 Water Usage

Appendix

A Water Conservation Ordinance, Effective February 2, 1999,
Amended February 2010
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SECTION 1
Introduction
The purpose of this Water Shortage Response Plan (WSRP) is to provide a framework for
making water supply and conservation decisions during times when water supplies in the
region may be low either due to drought conditions, water quality problems, or disruptions
in facility operations. This Plan supplements the Town of Apex’s Water Conservation
Ordinance (Appendix A), which became effective February 2, 1999 and was amended in
February 2010.
The Town of Apex has been required by the State to have a WSRP since 2001 by both our
Jordan Lake Allocation water supply contract and our interbasin transfer certificate. More
recently, as of July 1, 2009 all public and privately owned water systems subject to GS 143-
355 (I) are required to have an approved WSRP as part of their Local Water Supply Plan
(LWSP). Rules governing water use during droughts and water emergencies (15A NCAC
02E.0607) require specific items that must be included in those plans. This WSRP was
developed in accordance with the Water Shortage Response Plan Guidelines provided by the
Division of Water Resources (DWR) (January 2009).

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SECTION 2
Water Supply Assessment
The Town of Apex and the Town of Cary have a joint allocation of the water supply storage
volume in the Jordan Lake water supply pool. Only 61 percent of the Jordan Lake estimated
100 million gallons per day (MGD) safe yield has been allocated. The rest of the water
supply pool is currently unallocated. Of the allocated 61 MGD, 32 MGD of the water supply
pool (on an average annual basis), is allocated to the Towns of Apex and Cary. The Town of
Apex portion of this allocation is 8.5 MGD.
Two graphs shown as Attachments 1 and 2 at the end of this document illustrate historical
water usage for the Town of Apex by month for the calendar years 2007 and 2008.
The Towns of Apex and Cary currently share a raw water intake at Jordan Lake. The water
is treated at the Cary/Apex Water Treatment Plant (WTP). The Town of Apex also has
letter agreements with the Town of Holly Springs and Harnett County from which it could
receive emergency water supplies of approximately 1 MGD of finished water.
Interconnections exist with the water distribution systems of Raleigh, Holly Springs,
Harnett County, and Cary, which is also connected to Durham. These interconnections
provide the Town with access to several back-up supplies in the event of a failure that may
require the repair of pipelines. Although formal emergency agreements are not in place
with all of these communities, the interconnections do provide the Town with the flexibility
to respond to drought periods and other water supply emergencies.
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3-1
SECTION 3
Water Shortage Response Plan
The purpose of this Water Shortage Response Plan (WSRP) is to deal with short-term water
shortage, which may be caused by drought, water quality problems, or disruptions in
facility operations. The North Carolina Division of Water Resources (DWR) Water Shortage
Response Handbook for North Carolina Water Supply Systems (2003) requires that municipalities
develop a Water Shortage Response Plan/Program that includes the following components:

1. Adopt an ordinance to provide authority to enact system measures to reduce demand in
the case of an emergency;
2. Develop a method to evaluate ability to meet demand;
3. Develop procedures for implementing appropriate water use restriction stages;
4. Identify person(s) responsible for implementing the water shortage response protocols;
5. Develop a method to notify system employees and the customers of the shortage;
6. Develop a method to measure the supply and demand and identify the conditions that
trigger more or less restrictive measures;
7. Identify the levels of required response and actions to be taken;
8. Identify the enforcement and variances of the water shortage plan;
9. Develop a method for the Town to review and comment on the water shortage response
protocols, revision of the protocols, and the evaluation of the effectiveness of the
protocols.
Each of these components has been implemented by the Town of Apex and is described in
the following sections.
3.1 Authority of Plan
DWR recommends that every municipality adopt an ordinance to “provide for the
declaration of a water shortage and specify voluntary and mandatory conservation
measures to be imposed at each level of water shortage severity.”

The Town Manager has the authority to implement measures outlined in the water
conservation ordinance to address potential water shortages, including Section 12-101,
Continuing Water Conservation Measures which includes the odd/even outdoor irrigation
schedule; and Section 12-102, Stages of Conservation Measures in Response to Water Shortage. In
the Town Manager’s absence, the Assistant Town Manager has vested authority to
implement such measures. The Town Manager and/or the Assistant Town Manager will
initiate water shortage response Stages 1, 2, 3, and Emergency/Rationing according to
various factors affecting water supply and demand. Bruce Radford, Town Manager, can be
contacted at 249-3301 and Mike Wilson, Assistant Town Manager, can be contacted at 249-
3302.
SECTION 3 – WATER SHORTAGE RESPONSE PLAN
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3.2 Plan Activation and Notification Protocol
Once the potential for a water shortage has been declared, the following plan
implementation and communication steps are taken. Mandatory measures will remain in
effect until declared otherwise by the Town Manager, and updates to the plan over the
duration of the water shortage will be provided in the sequence outlined below.
1. The Town Manager (or designee) notifies the Mayor, Town Council, neighboring
municipal contract water recipients (if any), and Town employees.
2. The Public Information Officer (PIO) will contact the media (if the PIO is
unavailable, media contacts will be made by the Town Manager’s designee). The
media, including television, newspaper, and radio, will inform the public. The phone
number of the Public Works & Utilities Department (919-249-3427) will be provided
for additional information if needed by the public. Informational mailings will be
distributed to residents via monthly utility bills. In addition, the Town’s website,
www.apexnc.org, will be updated with the latest information.
3. Public Works & Utilities staff will coordinate with Finance Department Customer
Service so Town employees can help provide accurate information to the public and
to get a list of major water customers.
4. Staff will call major water customers (both irrigation and water accounts) and inform
them of the implemented measures.
5. Staff will contact the Fire Department and coordinate with bulk users.
6. Staff will supply fliers for distribution by field employees to place on customers’
doors or provide to customers that need more information.

3.3 Water Shortage Stages
Apex’s water shortage response consists of four stages as summarized in Table 3-1. The
stages have been designed and are defined to represent an increasing level of severity of
water shortage, subsequently triggering an increasing level of response to reduce the Town
of Apex water demands. The Stages are triggered when the water supply and/or the
demand changes. The Town’s ability to meet demand is dependent on several components
of the water supply system: the water source (Jordan Lake and/or purchase from others),
raw water intake and pipeline, treatment plant, storage tanks, and distribution system. The
Town continually monitors its water demand and supply, especially during times of
drought conditions.

SECTION 3 – WATER SHORTAGE RESPONSE PLAN

3-3
Stage 1
Spray irrigation using potable water is limited to one (1) day per week for all purposes
except the maintenance of athletic fields. No new turf watering exemption permits will be
issued and any existing permits for watering periods that begin later than 14 days after the
effective date of Stage 1 will be rescinded. Hand watering, drip irrigation, and subsurface
irrigation are still allowed. Other outdoor water uses such as pressure washing, car
washing, and keeping swimming pools filled are allowed, although customers are strongly
encouraged to minimize such uses.

Stage 2
Spray irrigation using potable water is not allowed for any purpose except the maintenance
of athletic fields. No new turf watering exemption permits will be issued, and any
previously issued exemption permits for watering periods that have not expired will be
rescinded. Hand watering, drip irrigation, and subsurface irrigation are still allowed. Other
outdoor water uses such as pressure washing, car washing, and keeping swimming pools
filled are allowed, although customers are strongly encouraged to minimize such uses.

Stage 3
No outdoor water use with potable water is allowed, including but not limited to: spray
irrigation, hand watering, drip irrigation, and subsurface irrigation, ornamental fountains,
car washing, pressure washing, and keeping swimming pools filled. No new turf watering
exemption permits will be issued and any previously issued permits for watering periods
that have not expired will be rescinded. Firefighting and utility system maintenance are the
only allowable outdoor water uses.

Emergency/Rationing
In this stage, the goal is to ensure there is drinking water available to protect public health
(e.g., health care, drinking water, basic sanitation). Customers are encouraged to use the
minimum amount of water needed for public health protection. No outdoor water use with
potable water is allowed, including but not limited to: spray irrigation, hand watering, drip
irrigation, and subsurface irrigation, ornamental fountains, car washing, pressure washing,
and keeping swimming pools filled. As in Stage 3, no new turf watering exemption permits
will be issued and any previously issued permits for watering periods that have not expired
will be rescinded. Firefighting and utility system maintenance are the only allowable
outdoor water uses.

SECTION 3 – WATER SHORTAGE RESPONSE PLAN
3-4
Table 3-1: Water Shortage Response Stage Summary
Year-round
Water
Conservation
Program
Water Shortage Response Stages
Stage 1 Stage 2 Stage 3 Emergency/
Rationing
Outdoor Spray
Irrigation
Three days per
week
One day per
week
None None None
Hand watering, drip
irrigation, subsurface
irrigation, athletic field
maintenance
Allowed Allowed Allowed None None
Other outdoor water
use such as pressure
washing, car washing,
filling swimming pools
Allowed Allowed Allowed None None
New Turf Watering
Exception Permits
Allowed No new permits
issued, permits
beginning more
than 14 days after
Stage 1 date
rescinded
None None None

3.4 Water Shortage Triggers
The goal of having staged trigger points is to provide the Town the ability to reduce their
demands during times of water shortages and thereby extend the timeframe between
reaching successive trigger points. Triggers are based on the ability to meet water demands
and are influenced by several components of the Town’s water supply system: the water
source, raw water intake and pipeline, treatment plant, storage tanks, and the distribution
system. Town staff continually evaluates the status of these components to determine if a
water shortage condition exists or is approaching. The primary trigger is the water supply
storage in Jordan.
3.4.1 Jordan Lake Water Supply Storage Allocation
Apex and Cary have a joint allocation of the water supply storage volume in the Jordan
Lake water supply pool. Apex Public Works & Utilities staff communicates regularly with
the Cary Public Works & Utilities staff regarding available water supply, especially during
drought conditions.
The Town of Cary is responsible for tracking the amount of water in storage for the
Apex/Cary allocation on a daily basis using daily and monthly water demand estimates,
SECTION 3 – WATER SHORTAGE RESPONSE PLAN

3-5
and daily lake inflows obtained from the U.S. Army Corps of Engineers (USACE). Cary
staff uses these storage estimates to predict a worst case scenario of the number of days of
water supply that remains. This worst case scenario does not take into account any inflow
to Jordan Lake; in other words, it is assumed that there is zero inflow to the lake. The
number of days of remaining water supply is calculated by dividing the storage volume in
the jointly allocated water supply pool by the average water demand for the previous 30
days. From these values, Apex staff determines the number of days of storage available to
the Town based on the Town’s percentage of the allocation and the recent demand profile.
DWR has recommended guidelines for monitoring the available water supply and when
necessary, implementing a minimum of three stages of water shortage response: voluntary,
mandatory, and emergency. As described previously, the Town of Apex has four water
shortage stages: Stage 1, Stage 2, Stage 3, and Emergency/Rationing. Table 3-2 shows
Apex’s four water shortage stages and the associated number of days of remaining storage
which act as the triggers to implement each stage. Table 3-3 shows the water supply
response triggers for increasing days of supply remaining; this table would be used when
coming out of a drought situation.

Table 3-2: Water Shortage Response Triggers for Declining Days of Supply Remaining
Stage Triggers When Days of Supply Remaining is Declining
(Water Shortage
declared)

Stage 1
Days of Supply Remaining 120 days or less
Stage 1 to Stage 2 Stage 1 has been in place for 28 continuous days
AND
Days of Supply Remaining 90 days or less
Stage 2 to Stage 3 Days of Supply Remaining 60 days or less
Stage 3 to
Emergency/
Rationing
Days of Supply Remaining 30 days or less

Table 3-3: Water Shortage Response Triggers for Increasing Days of Supply Remaining
Stage Triggers When Days of Supply Remaining is Increasing
Emergency/
Rationing to
Stage 3
Days of Supply Remaining has been at least 60 days for at least 14
continuous days
Stage 3 to Stage 2 Days of Supply Remaining has been at least 90 days for at least 14
continuous days
Stage 2 to Stage 1 Days of Supply Remaining has been at least 120 days for at least 14
continuous days
Water Shortage
ended
Jordan Lake Water Supply allocation is 100% full for at least 14
continuous days
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The triggers shown in Tables 3-2 and 3-3 serve as guidelines and are used by the Town of
Apex in combination with an assessment of the other factors that influence water supply
and demand as described in this section to determine the timing of implementation of the
appropriate water shortage stages during periods of water shortage.
3.4.2 Other Factors
The Town recognizes that there are several other factors to be considered when evaluating
the potential for water shortage conditions. These factors include:
1. Jordan Lake Elevation. The lake elevation is influenced most by the amount of inflow to
the lake from upstream and the amount of water released from the dam to the Cape Fear
River downstream. Apex Public Works & Utilities staff communicates regularly with
the Cary Public Works & Utilities staff regarding lake elevation, especially during
drought conditions. The Town of Cary is responsible for monitoring the lake levels and
how the elevation compares to the elevations of the raw water intakes in Jordan Lake.
The elevation of the top pipe of the primary raw water intake is at 208.3 feet mean sea
level, while the elevation of the top pipe of the lower intake is 204.25 feet mean sea level.
Extension devices have been fabricated to allow adjustments to the elevation of either
intake.
2. A sudden loss of supplemental water supplies during periods of high demand;
3. The occurrence of a major water transmission main break, fire, or any other emergency
that would require high volumes of water, such that demand could exceed supply;
4. An indication of short or long-term water quality concerns regarding Jordan Lake or
other sources;
5. An accidental or intentional contamination of the water system;
6. The level of interbasin transfers relative to Apex and Cary’s interbasin transfer (IBT)
certificate amount;
7. A drought advisory issued by the NC Drought Management Advisory Council;
8. A mechanical failure at the WTP or within the distribution system.
3.5 Enforcement
If there is a violation of any provision of the water conservation ordinance including the
mandatory water conservation measures, the violator is subject to a penalty of up to
$1,000.00 per violation per day. A warning is issued for a first offense. Subsequent
violations will be subject to the penalty fee. The Town may also choose to discontinue water
service if necessary due to continuing violations. Citizens are encouraged to report
violators to the Town Public Works & Utilities Department.
3.6 Variances
The Town recognizes that the requirements for water use reduction in Table 3-1 may have
significantly more impact on some customers than on others and in some cases could affect
public health and safety. To be considered for a variance, customers may submit a letter
requesting the variance to the Public Works & Utilities Director at PO Box 250, Apex, NC
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27502. The letter must include an explanation of why the requirements in Table 3-1 are not
appropriate, cause extreme hardship, or affect health and safety. If a variance from either
the Stage 3 or Emergency/Rationing requirements is requested, the letter should include
proposed water use reductions and an explanation of why they are more appropriate.
A decision by the Public Works & Utilities director or designee to approve or deny variance
requests can be expected within two weeks and will be based upon consideration of criteria
including but not limited to: impact on water demand, expected duration of water shortage,
alternative source options, social and economic importance, purpose of water use (i.e.,
necessary use of drinking water) and the prevention of structural damage.
3.7 Plan Evaluation
The Town of Apex is committed to providing a safe and reliable water supply to its citizens.
The Town understands that an effective WSRP is necessary to reduce system demands
during a water shortage situation. After a plan implementation, the Town will evaluate the
effectiveness of the trigger thresholds to prolong the Town’s water supply and the efficiency
of conservation to reduce water demands. The effectiveness of the protocols will be
measured by the frequency of their activation, the number of violation citations, and if
desired reductions were attained. Table 3-4 indicates the potential expected reduction from
normal use for each stages, depending on the time of year.
Table 3-4: Expected Water Use Reductions*
Water Shortage
Response Stage
Expected Approximate Reductions Relative to Normal Water Use
May through October November through April
Stage 1 13% 6%
Stage 2 32% 10%
Stage 3 38% 17%
Emergency/Rationing 46% 29%
*Town of Cary staff developed these numbers based on 2007 customer billing records.
3.8 Plan Revisions
Water Shortage Response Plans should be updated regularly in response to changing
conditions within the community. Circumstances warranting an updated plan may include
new development, water supply demands, or changes in the number or types of available
water supplies. A work group of Town staff will review procedures after each emergency
reduction stage and will recommend necessary improvements to the Town Manager.

This plan will also be subject for review following any water shortage declaration. If
indicated by these reviews or at a minimum of every five years as required by the
provisions of GS 143-355 (1) the WSRP will be updated and submitted to DWR for review.
An opportunity for public comment will be provided for any update of the WSRP before
presentation to the Town Council for approval. The Town of Apex Public Works & Utilities
Director (or designee) is responsible for initiating all WSRP updates.
SECTION 3 – WATER SHORTAGE RESPONSE PLAN
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3.9 Conservation Measures
The Town of Apex has multiple conservation measures that apply year-round even when
there is no water shortage. The measures are in place in an effort to responsibly manage the
valuable resource and to extend the Town’s water supply during times of approaching
drought conditions. The measures are listed below and explained in detail in Apex’s Water
Conservation Ordinance (Appendix A):
1. Mandatory year-round odd/even outdoor watering,
2. Prohibited operating conduct for irrigations systems;
3. Requiring rain sensors;
4. Operation of the rain sensors;
5. Irrigation surcharge;
6. Avoiding improper connections;
7. Improper connections;
8. Prohibiting unauthorized use.
In addition to the year-round measures outlined in the water conservation ordinance, the
Town also has water conservation education and incentive based measures that assist the
Town’s goal of responsible resource management. These education and incentive based
year-round conservation components are as follows:
1. Water Conservation webpage – The Town’s website contains information on
household water conservation tips, an educational outline on the year-round
irrigation restrictions, and frequently asked questions related to the water
conservation ordinance.
2. Water Conservation pamphlet – The pamphlet is provided to all citizens on an as
needed basis and details water conservation information including the schedule for
the odd/even irrigation schedule requirements, ways to save water, current water
restrictions, as well as contact information to call for questions on water conservation
or on concerns in reference to significant water losses at a residence or from public
water infrastructure.
3. Rain barrels – The Town provides citizens the ability to purchase rain barrels at cost
at the Public Work & Utilities Department. The ability to conveniently purchase rain
barrels provides citizens with an incentive for water conservation by using the rain
barrels for landscape watering and is an educational opportunity for the community.
3.10 Public Comment
The public will be given several opportunities for plan review and comment. A draft plan
will be posted on the Town’s website at www.apexnc.org at least 30 days prior to the
adoption vote by Town Council. A public meeting will be held at Apex Town Hall prior to
this adoption vote in order to document verbal comments on the plan. Notices for these
opportunities will be sent out in customer utility bill mailings.

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APPENDIX A
Water Conservation Ordinance, Effective February
2, 1999, Amended (Draft) April 2009

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APPENDIX A – WATER CONSERVATION ORDIANCE, EFFECTIVE FEBRUARY 2 1999, AMENDED AUGUST 7, 2007

A-1
TOWN OF APEX CODE OF ORDINANCES
Chapter 12 MUNICIPAL UTILITIES AND SERVICES*
ARTICLE III. WATER AND SEWERS
DIVISION 5. WATER CONSERVATION*
__________
*Editor's note: An Ordinance adopted Feb. 2, 1999, deleted §§ 12-100--12-104 in their entirety and replaced them
with similar provisions to read as herein set out. Former §§ 12-100--12-104 derived from the 1973 Code and an
Ord. of July 24, 1986.
__________
Sec. 12-100. Definitions.
Customer means any person in whose name the Town maintains an account for water use, or
who is responsible for payment of water passing through a particular meter. All customers
are responsible for any use of water that passes through the meter for which they have an
account or are otherwise responsible and are deemed to be users hereunder.
Hand watering means any form of irrigation that is connected to the Town's public water
supply system and held in hand during irrigation use.
Impervious surface means any surface which cannot be penetrated by water or which causes
water to run off the surface, including streets, driveways, and sidewalks.
Irrigation means the act of applying water to the outdoor landscape through means such as
moveable sprinklers, installed watering systems, hoses, or other devices.
Irrigation system means a device or combination of devices that transmit or apply Town
water or any mixture containing Town water to residential or commercial lawns, landscapes
or green space.
Person means any individual, corporation, company, association, partnership, or other
entity.
Public Works and Utilities Director means the Town department head in charge of the Public
Works &Utilities department.
Rain sensor means a device that measures rainfall and overrides the irrigation cycle of an
irrigation system, thus turning it off, when a predetermined amount of rain has fallen. To
meet the requirements of this division, a rain sensor shall be adjusted to shut off irrigation
systems when one-fourth inch (1/4”) of rain has fallen.
Town Manager means the Town Manager or his designee.
Town water means all water available to the Town for treatment and any treated water
introduced by the Town into its potable water distribution system. Not included in this
definition is any treated wastewater effluent reclaimed for reuse in irrigation or other
approved uses.
Trigger means conditions defined in the Water Shortage Response Plan (WSRP) which will
cause a water shortage to be declared or ended, or cause water shortage response stages to
be increased or decreased in severity.
Water shortage exists when the Town cannot satisfy the ordinary demands and requirements
of water consumers served by the Town without depleting the water supply to a level that
jeopardizes the continued availability of water for human consumption, sanitation, and fire
protection.
Water system means the system of pipes, valves, meters, tanks, pumps, and treatment
facilities owned and operated by the Town of Apex for the purpose of collecting, treating,
and distributing Town water.
(Ord. of 2-2-99, § 1; Ord. No. 07-0807-09, § 1, 8-7-07)
Cross references: Definitions and rules of construction generally, § 1-3.
APPENDIX A – WATER CONSERVATION ORDIANCE, EFFECTIVE FEBRUARY 2 1999, AMENDED AUGUST 7, 2007
A-2

Sec. 12-101. Continuing water conservation measures.

The water conservation measures enumerated in this section shall apply to all Town water
customers, Town water users, and other persons at all times whether or not a water shortage
exists.
(1) Mandatory year-round odd/even watering schedule. Properties with odd-numbered
addresses may water lawns and/or landscapes only on Tuesday, Thursday, and Saturday.
Properties with even numbered addresses may water lawns and/or landscapes only on
Wednesday, Friday, and Sunday. No lawns and/or landscapes shall be watered on
Monday. Watering with a hand-held hose is permitted every day.
Exemption: Property owners may obtain a 45 day New Landscape Permit from the Public
Works Department for the purpose of establishing new plantings. New plantings for the
purpose of this permit are defined as large commercial plantings or the installation of new
sod or seed to a bare area of more than 50% of the grassed or proposed grassed area of a
residential yard. Such a permit may not be granted for over-seeding of established grass.
The permit will become effective at the requested start date and expire 45 days later.
(2) Prohibited conduct in operating irrigation systems. No person shall operate or maintain an
irrigation system in a manner that:
a. Allows water from emitting devices to fall on impervious surfaces to the extent that water
runs off the property being irrigated onto public streets or property; or
b. Allows water from emitting devices to fall on any surface such that water accumulates to
the extent that it runs off the property being irrigated onto public streets or property.
(3) Rain sensors required. Rain sensors are required on all automatic irrigation systems. The
sensors shall be installed in appropriate locations in order to prevent irrigation during
periods of rainfall.
(4) Operation of rain sensors. Rain sensors shall be adjusted and set so that for each rainfall
event, the sensors shut off the irrigation system after one-fourth inch (1/4”) of rainfall has
occurred. Rain sensors shall be installed according to the manufacturer's instructions and in
a location that provides full exposure to rainfall. Rain sensors shall be maintained in proper
working condition.
(5) Irrigation surcharge. The charges for water used for irrigation shall be computed by
multiplying the customer's otherwise applicable water rate by a multiplier established by
the Town Council and revised from time to time.
(6) Damage to system. No person shall damage, cut, break, obstruct, alter, interfere with, or
tamper with any water pipe, water main, hydrant sewer pipe, water tank, water meter,
water meter box, or any other part of the water system without the express written
permission of the Town.
(7) Improper connections. No person shall make a connection to any portion of the water
system in a manner that violates the North Carolina State Building Code or the Rules
Governing Public Water Systems promulgated by the State of North Carolina or any agency
thereof.
(8) Unauthorized use. No person shall consume, use, or otherwise take water from the water
system without first obtaining permission from the Town and making arrangements to pay
the applicable fees for the water.
(Ord. of 2-2-99, § 1; Ord. No. 07-0807-09, § 2, 8-7-07)
APPENDIX A – WATER CONSERVATION ORDIANCE, EFFECTIVE FEBRUARY 2 1999, AMENDED AUGUST 7, 2007

A-3

__________
Sec. 12-102. Stages of conservation measures in response to water shortage.

The mandatory odd/even watering schedule shall be enforced year-round. To avoid or
lessen the impact of a water shortage, the Town Manager will institute Stages 1, 2, 3 and
Emergency/Rationing by written declaration, which shall be effective upon being signed
and posted on the Town bulletin board and a copy placed with the Town clerk.

The Town Manager shall base his action upon a review of all factors that affect the Town's
water supply including, but not limited to, current water supply, stream flow, lake level,
seasonal effect on water supply, and current consumption rates. The water shortage
response triggers for declining days of supply as well as increasing days of supply will be
followed as outlined in the Town’s Water Shortage Response Plan (WSRP). The following
table illustrates the irrigation restrictions associated with each stage of mandatory water
conservation.

STAGE 1 STAGE 2 STAGE 3 EMERGENCY/
RATIONING
SPRAY
IRRIGATION
1 DAY/WEEK NOT
ALLOWED
NOT
ALLOWED
NOT
ALLOWED
HAND WATERING ALLOWED ALLOWED NOT
ALLOWED
NOT
ALLOWED
DRIP IRRIGATION1 ALLOWED ALLOWED NOT
ALLOWED
NOT
ALLOWED
SUBSURFACE
IRRIGATION2
ALLOWED ALLOWED NOT
ALLOWED
NOT
ALLOWED
ATHLETIC FIELD
IRRIGATION
ALLOWED ALLOWED NOT
ALLOWED
NOT
ALLOWED
NEW TURF
WATERING
EXEMPTION3
NO NEW
PERMITS
NO NEW
PERMITS
NO NEW
PERMITS
NO NEW
PERMITS
1. Drip irrigation is the slow, even application of low-pressure water to soil and plants using plastic tubing
placed directly at the root zone.
2. Subsurface irrigation is irrigation that occurs underground, down as far as 9-12” to effectively irrigate the
root zone with much less potential for evaporation than traditional spray irrigation systems.
3. Exemptions granted prior to the declaration of a water shortage would continue to be honored until the 45-
day period has expired.

(1) Stage 1. In Stage 1, the Town shall publicize and request the public to comply with the
following conservation measures:
a. Spray irrigation is limited to once per week. Hand watering is permitted every day.
Athletic field irrigation is permitted.
APPENDIX A – WATER CONSERVATION ORDIANCE, EFFECTIVE FEBRUARY 2 1999, AMENDED AUGUST 7, 2007
A-4
b. No new 45-day landscape permits shall be issued. Permits already issued during a Stage
1 declaration would continue to be honored until the 45-day period has expired.
c. Reuse household water when possible, (within State gray water laws).
d. Limit vehicle washing to the minimum.
e. Refrain from washing down outside areas such as sidewalks, patios, etc.
f. Use shower for bathing rather than bathtub, and limit shower to no more than four
minutes.
g. Limit flushing of toilets by multiple usages.
h. Refrain from leaving faucets running while shaving or while rinsing dishes.
i. Limit the use of clothes washers and dishwashers and when used, to operate fully loaded.
j. Install water-flow restrictive devices in showerheads.
k. Use disposable and biodegradable dishes.
l. Install water-saving devices such as bricks, plastics, bottles or commercial units in toilet
tanks.
m. Limit hours of operation of water-cooled air conditioners.

(2) Stage2. In Stage 2, the Town shall continue all recommendations of Stage 1 and the
following measures shall be mandatory:
a. Spray irrigation is not allowed. Hand watering is permitted.
b. Filling of newly constructed or drained swimming or wading pools shall require the
approval of the Public Works &Utilities director. Makeup water is allowed for maintaining
the operation of swimming or wading pools.
c. No introducing water into any ornamental fountain, pool or pond or other structure
making similar use of water.
d. No using water from public or private fire hydrants for any purposes other than fire
suppression or other public emergency.
e. Watering for dust control or compaction shall require the approval of the Public Works &
Utilities director.
f. No using water for any unnecessary purpose or intentionally wasting water.

(3) Stage 3. In Stage 3, all the provisions of Stages 1 and 2 apply and, in addition, the
following measures shall be mandatory:
a. Spray irrigation is not allowed. Hand watering is not allowed. The irrigation of athletic
fields is not allowed.
b. No nonessential use of water for commercial or public use, and the use of single service
plates and utensils is encouraged and recommended in restaurants.
c. No washing down outside areas such as streets, driveways, service station aprons,
parking lots, office buildings, exterior of existing or newly constructed homes or
apartments, sidewalks, or patios, or use of water for other similar purposes.
d. Washing of vehicles is not permitted.

(4) Emergency/Rationing Stage. In this stage, all the provisions of Stages 1 through 3 apply
and, in addition, the following measures are mandatory:
a. No using water outside of structures for any use other than emergencies involving fire.
Fire protection will be maintained, but where possible, tank trucks shall use raw water.
b. All industrial uses of water are prohibited.
APPENDIX A – WATER CONSERVATION ORDIANCE, EFFECTIVE FEBRUARY 2 1999, AMENDED AUGUST 7, 2007

A-5
c. All other uses of water will be limited to those uses necessary to meet essential health and
safety needs of customers.
d. No introducing water into swimming pools.
(Ord. of 2-2-99, § 1; Ord. of 3-20-00, § 1; Ord. No. 07-0807-09, § 3, 8-7-07)
Sec. 12-103. Violation, enforcement, and penalties.
(a) Violations. It shall be unlawful for any person to violate any provision of this division
including any mandatory water conservation measure.
(b) Criminal penalties. Violations of this section shall not be a crime under G.S. 14-4, or other
law.
(c) Civil penalties. Any person who violates this division is subject to a civil penalty of up to
$1,000.00 per violation per day for so long as the violation exits. Violations and penalties
shall be determined by the Public Works & Utilities director. In determining the amount of a
civil penalty, the Public Works & Utilities director shall take into account all relevant
circumstances, including, but not limited to, the extent of harm caused by the violation, the
magnitude and duration of the violation, efforts to correct the violation, the compliance
history of the parties against whom the violation is assessed, the cost of enforcement to the
Town, whether the violation was willful or intentional and any other factor as justice
requires. The Town shall serve a written citation on the violator, and the customer if
different, by personal delivery or by certified or registered mail, return receipt requested.
The citation shall describe the violation and shall specify the amount of the civil penalty
levied. If a person fails to pay a civil penalty within ten days after receiving written notice
of violation, then the Town may recover the penalty through a civil action in the nature of
debt, including all further accruing penalties for continuing violations.
(d) Continuing violation. Each day that a violation continues shall constitute an additional
and separate violation.
(e) Discontinuance of service. The Town may discontinue service to a customer upon a
determination by the Public Works & Utilities director that the customer violated a
provision of this division. Prior to discontinuance, the Public Works & Utilities director
shall give the customer written notice of the violation and an opportunity to contest the
discontinuance within 48 hours.
(f) Multiple remedies. The Town may seek to enforce this division through any appropriate
equitable or legal action or through any combination of these or the foregoing remedies.
(g) Appeal. A person who is assessed civil penalties or whose service is discontinued may
appeal to the board of adjustment by serving written notice to the Town clerk within ten
days of the service of citation or notice of discontinuance. An order of discontinuance is not
stayed pending appeal to the board of adjustment.
(Ord. of 2-2-99, § 1; Ord. No. 07-0807-09, § 4, 8-7-07)
__________
Sec. 12-104. Reserved.

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Appendix CNotice of Intent to Modify the InterbasinTransfer Certificate
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Appendix DModeling Evaluation of the Effects of the Cary/Apex Water Supply Interbasin Transfer Technical Memorandum
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1
TECHNICAL MEMORANDUM

Modeling Evaluation of the Effects of the Cary/Apex
Water Supply Interbasin Transfer
PREPARED FOR: Town of Cary and Town of Apex
PREPARED BY: CH2M HILL
DATE: July 31, 2014

Introduction
Since the mid-1990s the Towns of Apex, Cary and Morrisville and Wake County (on behalf
of the Wake County portion of Research Triangle Park (RTP), referred to as RTP South
henceforth) have been cooperatively working to develop and manage their water resources.
The Towns, Wake County, and RTP cooperate under various organizational arrangements
for raw water supply, water treatment, water distribution, wastewater collection,
wastewater treatment, and reclaimed water distribution. Together, the Towns and Wake
County have been planning for a secure, long-range water supply for their customers and
responsible water management.
The water and wastewater utility system serving customers throughout the Towns and RTP
South is managed by the Towns of Apex and Cary. Apex is responsible for service provision
within its own jurisdiction. Cary is responsible for service provision within its own
jurisdiction, as well as Morrisville’s jurisdiction (merged its utility with the Town of Cary in
2006), RTP South and Raleigh-Durham (RDU) airport.
The Towns and Wake County (for RTP South) are subject to an interbasin transfer (IBT)
certificate issued by the EMC in 2001. This certificate is required by North Carolina law
because wastewater discharges and consumptive uses occur in receiving basins that differ
from the Towns’ water supply source basin, the Haw River subbasin. The current IBT
certificate limits transfers from the Towns’ water supply source basin, the Haw River
subbasin (Jordan Lake), to the Neuse River basin to 24 mgd on a maximum day basis. Figure
1 illustrates water movement within the Towns’ service areas and how these movements
relate to the basin boundaries defined in NCGS 143-215.22G.
The Towns have maintained compliance with their IBT certificate since 2001 – including the
maximum day limit and eight additional conditions. Compliance with the transfer limit and
certificate conditions is detailed in the 2013 Annual Report on Interbasin Transfers for RTP
South and the Towns of Apex, Cary, and Morrisville, annual compliance reports are
submitted to the NC Division of Water Resources (DWR). No impacts have been identified
as a result of the ongoing transfers; this is consistent with both the 2000 Environmental
Impact Statement (EIS) and the Record of Decision (ROD), which is the basis for the Towns’
current IBT certificate and predicted no significant direct impacts.
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
2
In 2013, the NC General Assembly amended the IBT statute, making changes to the basis of
IBT calculation and allowing for an existing certificate modification process option. To
ensure their IBT certificate is aligned with the latest IBT statute and the needs of the
communities are met through 2045, the Towns and Wake County are proceeding with a
request for a modification of their current IBT certificate to accomplish three objectives:
1. Shift from a maximum day IBT calculation to IBT calculated as the daily average
of a calendar month, per the changes to NCGS 143-215.22L (Regulation of surface
water transfers) based on Session Law 2013-388.
2. Include, at the request of NCDWR, transfers to the Cape Fear River subbasin
(consumptive uses in the Town of Apex service area), so that the modified
certificate addresses transfers from the Haw River subbasin to both the Neuse
River and Cape Fear River subbasins.
3. Base the certificate term on a 30-year planning period, ensuring the modified
certificate term addresses IBT through 2045 (the previous IBT certificate was
based on a 30-year planning period ending in 2030).
The Towns expect to request that the modified certificate allow transfers up to 33 mgd from
the Haw River subbasin, calculated as a daily average of a calendar month. Concurrent
with the certificate modification, the Towns have requested increased water supply
allocations from Jordan Lake, also based on a 30-year planning horizon through 2045. The
Towns intend to continue to use their three existing WRFs, as well as the new Western
Wake Regional Water Reclamation Facility (WWRWRF) to treat wastewater.
It should be noted that there is no alternative to modifying the Town’s current IBT certificate
to meet the first two objectives listed above – to comply with new law and to satisfy a
request from NCDWR. These objectives could be addressed by administrative update to the
Towns’ certificate based on the 2013 updates to the IBT statute, NCGS 143-215.22L (v).
Alternatives discussed in this memorandum are alternatives to the requested IBT as a result
of extending the planning period to 2045.
Purpose of the Technical Memorandum
The purpose of this technical memorandum (TM) is to summarize the results of the
hydrologic model used to evaluate impacts of the IBT. This evaluation is being completed to
support the development of a State Environmental Policy Act (SEPA) Environmental
Assessment (EA), required under NCGS 143-215.22L for an IBT certification modification.
The remainder of this memorandum is organized as follows:
 Hydrologic Modeling Analysis Overview
 Modeling Scenarios
 Modeling Results
 Summary and Conclusions
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
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FIGURE 1
Water Movement Illustration

MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
4
Hydrologic Modeling Analysis Overview
The Cape Fear-Neuse River Basin Hydrologic Model (CFNRBHM), developed by
HydroLogics, Inc. for NCDWR, was used to evaluate the potential impacts from the Towns’
increased IBT.
Background on the CFNRBHM
NCDWR originally developed individual hydrologic models for the Cape Fear River and
Neuse River basins. In 2012, to recognize the numerous interconnections between the two
basins, they contracted with HydroLogics, Inc. to develop a combined Cape Fear River basin
and Neuse River basin hydrologic model. This revised model was completed in January
2014. The resulting system is modeled using the OASIS water resources program which
combines graphical representations of components such as river sections, withdrawals and
discharges with logical statements which describe their behavior. These statements,
including operational rules, demand values, and elevation-storage relationships are
evaluated within a linear programming environment to determine the state of each
component within the system (HydroLogics, Inc., 2006).
The CFNRBHM includes all withdrawals and discharges in both river basins greater than
100,000 gallons per day (gpd, or 0.1 mgd). A schematic of the CFNRBHM showing the
model layout and all model nodes is provided in Figure 2. The model schematic shows
reservoirs represented as red triangles. The blue squares represent surface water
withdrawals, and yellow circles represent collection nodes or surface water discharges.
CH2M HILL obtained the CFNRBHM OASIS model from NCDWR to evaluate the
hydrologic impacts of the proposed IBT certificate modification on water resources in the
Cape Fear River basin. The “JLP2” scenario dated January 23, 2014 was developed by the
Triangle J Council of Governments and HydroLogics for the Jordan Lake Partnership, based
on scenarios from NCDWR, and was used for the basis of this analysis.
Model Structure
The CFNRBHM model structure greatly increases the spatial resolution of the model over
previous versions for the Cape Fear River basin alone. A major focus of the model
development was to explicitly specify and directly link withdrawals and discharges for
individual entities, including municipalities and industries. This linkage allows for a better
representation of the many regular and emergency interconnections used to meet water
demands.
As part of the model development, HydroLogics, Inc. also extended the simulation period to
include the time frame from January 1930 through September 2011. This period covers a
wide range of hydrologic conditions. This was an important update because in the last ten
years, North Carolina experienced two of the most extreme droughts on record. Both
droughts included periods of exceptional drought, the most extreme drought classification.
The exceptional drought of the 1950’s is also included in the simulation period, which is the
most severe drought of record for the period.
Watershed inflows are specified on a daily basis through an underlying database.
Withdrawals and discharges can be specified in the model, typically as monthly values. The
model can predict instream flow and reservoir storage for each component of the model
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
5
structure on a daily, weekly, or monthly basis. Hydrologic analyses were run on a daily
time step.
FIGURE 2
Schematic Showing the Cape Fear - Neuse River Basin Hydrologic Model Layout and Nodes

MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER

6
Jordan Lake Drought Contingency Plan
As part of the CFNRBHM development, HydroLogics, Inc. incorporated the latest version of
the Jordan Lake Drought Contingency Plan into the model; this plan was revised by the US
Army Corp of Engineers (USACE) in 2008. The Jordan Lake drought levels, triggers and the
modified flow targets at the Lillington United States Geologic Survey (USGS) flow gaging
station are presented in Table 1. This plan was developed after the USACE and other
stakeholders recognized during the 2001-2002 drought that the previous plan was not
sufficient to manage the lake for its intended uses during such extreme conditions, and
made a significant difference in the lake elevations during the 2007-2008 drought. It should
be noted that incorporation of this new Drought Contingency Plan causes large differences
between model results from current scenarios and those from modeling scenarios presented
in the 2000 EIS supporting the current IBT certificate.

TABLE 1
Jordan Lake Drought Contingency Plan – Drought Level, Drought Triggers and Flow Targets
Drought Level
Drought Triggers
Water Quality Storage Pool
Remaining (percent)
Flow Targets
Lillington USGS Gaging Station
Flows (cfs)
0 > 80 600 ± 50
1 60 – 80 450 -600 ± 50
2 40 - 60 300 - 450 ± 50
3 20 - 40 None; minimum release of 200 cfs
4 0 - 20 None; minimum release of 100 cfs
Water Shortage Response Plans
All municipalities in NC are required, by the State, to have a Water Shortage Response Plan
(WSRP) to effect reduction of water use during dry to extreme drought conditions; the
Towns are further required to have drought management plans by both their Jordan Lake
allocation and their IBT certificate. The WSRPs must include an expected reduction in
demand resulting from water restrictions which are implemented based on a set of triggers
such as stream flow or reservoir level. WSRPs for public water suppliers in the Cape Fear
River and Neuse River basins were incorporated into the CFNRBHM model by
HydroLogics, Inc. during the model development, with the ability to turn the WSRPs “on”
and “off”.
For the hydrologic analyses presented in this TM the WSRPs were turned “on”. Therefore,
the modeling results include the effect of the WSRPs reducing withdrawals from surface
waters during low flow periods. The effect of the Towns’ WSRPs will also reduce the
influence of their water supply transfers out of the Haw River subbasin.
Current and Future Withdrawals and Discharges
Current Withdrawals and Discharges
Estimates of existing withdrawals and discharges were compiled by NCDWR from sources
including, but not limited to, Local Water Supply Plans (LWSP), information provided
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
7
directly from municipalities, national pollutant discharge elimination system (NPDES)
reporting, water withdrawal and transfer registration, and from the Department of
Agriculture. These estimates, as part of NCDWR’s existing conditions model scenario, were
provided for public review on September 6, 2013. As part of the review process, Cary, Apex,
other members of Jordan Lake Partnership, as well as other municipalities within the basins,
reviewed the model and provided comments to NCDWR. The model scenario used to
represent existing conditions reflects modifications made as part of this review process.
NCDWR stated that the baseline “existing conditions” model scenario, for purposes of
comparisons, will be representative of 2010 withdrawals and discharges and therefore is
used in this TM to represent current conditions.
Future Projections
Water withdrawal and discharge projections for future periods, including the year 2045,
were compiled from LWSPs and information provided directly from municipalities by
NCDWR. These estimates, as part of NCDWR’s future conditions model scenarios, were
provided for public review on September 6, 2013. As part of the review process, Cary, Apex,
other members of Jordan Lake Partnership, as well as others municipalities within the
basins reviewed the model and provided comments to NCDWR.
The withdrawal and discharge projections for the Towns of Apex, Cary and Morrisville and
RTP South utilized in the CFNRBHM are as presented in the Towns’ Long Range Water
Resources Plan (LRWRP) (CH2M HILL, 2013).
The CFNRBHM model scenario developed to represent the 2045 conditions was used in the
hydrologic modeling analysis presented in this TM.
Model Review
As described above, the original CFNRBHM model was revised to incorporate up to date
withdrawal and discharge information provided by municipalities in the basins.
HydroLogics, Inc. incorporated these changes into a revised model and calibrated the model
by comparing historic and predicted flows at multiple locations. Plots and statistics were
developed by HydroLogics, Inc. and reviewed by NCDWR to ensure appropriate alignment
with model calibration tolerances. An example of these calibration results is provided in
Figure 3.

MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
8
FIGURE 3
Example of Model Calibration (Flow at Lillington from 2002 - 2012)

Model Use for Evaluating IBT
A process to evaluate the potential changes in key hydrologic impact indicators, water levels
(elevation) and flows was developed by CH2M HILL in collaboration with NCDWR. The
approach for this process was based on the use of the CFNRBHM to evaluate key
hydrologic indicators, including:
 Jordan Lake elevation
 Water Quality Pool volume (%)
 Water Supply Pool volume (%)
 Cape Fear River flow at Lillington
 Cape Fear River flow at Fayetteville
These same indicators were used in the 2000 EIS that was used to analyze impacts of the
currently permitted IBT. Indicators were examined based on various combinations of
flow/level duration curves, time series plots, and results during extreme conditions.
Overall, the process included the development of an assessment strategy, development of
alternative future scenarios, revision of the CFNRBHM (to reflect the alternative scenarios),
and evaluation of differences under the alternative future scenarios.
Modeling Scenarios
The CFNRBHM model was used to evaluate the impacts of the proposed IBT certificate
modification. The specifics of the modeling scenarios were developed through discussions
with NCDWR.
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
9
Environmental Assessment Alternatives
Alternatives to be evaluated as part of a SEPA EA in support of the Towns’ proposed IBT
certification modification include the following:
1. No action:
a. The Towns pursue no increase in water supply from Jordan Lake and no
increase in IBT to meet 2045 demands.
2. Modify IBT certificate:
a. With an increase in IBT to meet 2045 demands (Proposed Alternative)
i. Towns increase their Jordan Lake water supply allocation and
continue the planned use of the Towns’ 4 WRFs.
b. With an increase in IBT to meet 2045 demands and fully use current
permitted wastewater capacity
i. Towns increase their Jordan Lake water supply allocation and
continue the planned use of the Towns’ 4 WRFs but utilize the full
permitted capacity of the South Cary WRF (16 mgd).
ii. This alternative represents an increased Neuse discharge IBT scenario
based on the currently permitted capacity of the Towns’ WRFs
located within the Neuse River basin and projected future wastewater
flows.
3. Avoid IBT certificate modification by:
a. Transferring untreated wastewater from the Neuse River Basin to the
WWRWRF, which discharges to the Cape Fear River Basin
i. Towns increase their Jordan Lake water supply allocation and
continue the planned use of the Towns’ 4 WRFs, in addition to
transferring raw untreated wastewater to the WWRWRF to avoid an
increase in IBT.
b. Transferring treated wastewater effluent from the Neuse River Basin to the
Cape Fear River Basin
i. Towns increase their Jordan Lake water supply allocation and
continue the planned use of the Towns’ 4 WRFs, in addition to
transferring treated wastewater effluent to be discharged in the Cape
Fear River basin avoiding an increase in IBT.
c. Using a water supply source in the Neuse River Basin
i. No expansion of the Towns’ Jordan Lake water supply allocation,
future water supply needs would be met by a new Neuse River basin
water supply or interconnection with another utility with an existing
water supply in the Neuse River basin.
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
10
d. Using groundwater as a water supply source
i. Development of a groundwater supply source.
e. Utilizing additional Water Resources Management Tools
i. Implementation of measures to minimize and/or offset potable water
demand to avoid additional IBT.
The above alternatives represent alternatives to the proposed IBT certificate modification
related to the extension of the planning period through 2045. The specific details on each
alternative will be presented in the SEPA EA.
Hydrologic Model Scenarios
Four hydrologic model scenarios were used to evaluate the various EA alternatives,
described in the preceding section. These model scenarios were developed in partnership
with NCDWR to represent the EA alternatives and allow for a comparative evaluation of the
alternatives to the Towns’ proposed increased Jordan Lake water supply withdrawal and
IBT. These model scenarios provide a comprehensive understanding of the effects from an
increased withdrawal and IBT, and the results from EA alternatives not explicitly included
in the model scenarios would be similar. In the case of EA alternatives that may increase
discharges within the Cape Fear River, there may be a small increased benefit to the lowest
flow periods (downstream of Jordan Lake) but a significant portion of the low flow
hydrograph for the river will be controlled by the operational targets at the Lillington USGS
gage dictating the releases from the Jordan Lake water quality pool. Table 2 provides an
outline of the model scenarios representing each EA alternative.
Appendix A contains a table of model inputs for each scenario that includes the
withdrawals, discharges and monthly patterns for the Cary/Apex system. The following
sections provide a summary of each model scenario.
2010 Baseline
The 2010 Baseline scenario represents existing conditions for the Cary/Apex system and the
Cape Fear and Neuse River basins. This scenario is an unmodified version of the final 2010
CFNRBHM scenario (model file JLP2_2010, which is the same as a current model version
Simbase_Jan_2014). Water supply withdrawals and discharges throughout the basins are set
to actual 2010 levels. Table 3 outlines the 2010 Jordan Lake withdrawals in the CFNRBHM
2010 scenario.
2045 Baseline (EA Alternative 1 and Alternative 3a through 3e)
The 2045 Baseline scenario is intended to approximate 2045 conditions without the
proposed IBT certificate modification, and is based on the withdrawal and discharge values
used in the 2000 Environmental Impact Statement (EIS) - the basis of the Towns’ current IBT
certificate. The objective of this model scenario is to represent EA alternatives where the
Towns do not increase their IBT above the current IBT certificate limit, adjusted to an
average day of a calendar month basis. This objective could be simulated by either
constraining the water supply withdrawn from Jordan Lake (the 2045 Baseline scenario) or
by increasing the discharge/return to the Cape Fear River basin with an increased
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
11
TABLE 2
Modeling Scenarios Representing EA Alternatives

Alternative
Number
EA
Alternative
EA Alternative
Description
Modeling Scenario
Representing an EA
Alternative
Baseline Baseline 2010 Baseline
2. Modify IBT certificate
2a
With an increase in IBT to meet
2045 demands
(Proposed Alternative)
2045 Requested IBT
2b
With an increase in IBT to meet
2045 demands and fully use
current permitted wastewater
capacity in the Neuse River
Basin
2045 Increased Neuse
Discharge IBT
1. No action
&
3. Avoid IBT certificate
modification
1 No Action
2045 Baseline
3a
Transferring untreated
wastewater from the Neuse River
Basin to the WWRWRF, which
discharges to the Cape Fear
River Basin
3b
Transferring treated wastewater
effluent from the Neuse River
Basin to the Cape Fear River
Basin
3c Using a water supply source in
the Neuse River Basin
3d Using groundwater as a water
supply source
3e Utilizing additional Water
Resources Management Tools
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
12
Jordan Lake withdrawal. Alternatives 3a and 3b represent future scenarios with an
increased discharge to the Cape Fear River basin, but ultimately the results for model
scenarios explicitly representing these alternatives would be very similar to the 2045
Baseline model scenario. There may be a small increased benefit to the lowest flow periods
(downstream of Jordan Lake), but a significant portion of the low flow hydrograph for the
river will be controlled by the operational targets at the Lillington USGS gage dictating the
releases from the Jordan Lake water quality pool. Therefore, the EA Alternatives that do not
increase the Towns’ IBT (1 and 3a through 3e) are all represented by the 2045 Baseline
model scenario.
The CFNRBHM model structure is significantly different from that of the model used for the
2000 EIS. To the extent possible, the 2045 Baseline scenario was set up to replicate the
Cary/Apex system components from the 2000 EIS. To achieve this, withdrawals, discharges,
and the associated monthly patterns for the Cary/Apex system are specified to replicate the
assumptions of the 2000 EIS (CH2M HILL, 2000). Withdrawals and discharges for the
remainder of the Cape Fear and Neuse River basins are specified based on the projected
2045 conditions.
This model scenario is a modified version of the final CFNRBHM 2045 scenario
(JLP2_Year2045). Table 3 outlines the 2045 Baseline scenario Jordan Lake withdrawals.
2045 Requested IBT (EA Alternative 2a)
The 2045 Requested IBT scenario represents 2045 conditions for the Cary/Apex system and
the Cape Fear and Neuse River basin, with withdrawals and discharges as projected by the
municipalities, and would result in the requested IBT.
This model scenario is the final CFNRBHM 2045 scenario (model file JLP2_Year2045). Table
3 outlines the 2045 Requested IBT scenario Jordan Lake withdrawals.
2045 Increased Neuse Discharge IBT (EA Alternative 2b)
The 2045 Increased Neuse Discharge IBT scenario is similar to the 2045 Requested IBT
scenario with the one modification - some wastewater flow is redirected from the
WWRWRF to the South Cary WRF to utilize the entire permitted capacity of the South Cary
WRF (16 mgd). This scenario represents 2045 conditions for the Cary/Apex system and the
entire Cape Fear and Neuse River basins, with withdrawals and discharges as projected by
the basin municipalities.
This model scenario is a modified version of the final CFNRBHM 2045 scenario
(JLP2_Year2045). Table 3 outlines the 2045 Increased Neuse Discharge IBT scenario Jordan
Lake withdrawals.
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
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TABLE 3
Current and Future Jordan Lake Allocation Holders - Average Day Water Supply Withdrawals
2010 Baseline
Scenario
Actual Use
2045 Baseline
Scenario
Projected Use
2045 Requested IBT
Scenario
Projected Use
2045 Increased
Neuse Discharge IBT
Scenario
Projected Use
EA Alternative
1, 3a – 3e
EA Alternative
2a
EA Alternative
2b
Cary/Apex 18.4 a 25.3b 39.2 c 39.2 c
RTP South 0.6 a 2.5b 3.2 c 3.2 c
Morrisville 1.7 a 5.0b 3.5 c 3.5 c
Chatham County 2.2 a 13.1c 13.1c 13.1c
OWASA 0.0 5.0 c 5.0 c 5.0 c
Orange County 0.0 1.5 c 1.5 c 1.5 c
City of Durham 0.0 16.5 c 16.5 c 16.5 c
Hillsborough 0.0 1.0 c 1.0 c 1.0 c
Holly Springs 0.0 2.0 c 2.0 c 2.0 c
Pittsboro 0.0 6.0 c 6.0 c 6.0 c
Sub-total 22.9 77.9 91.0 91.0
Other 0.0 22.1 9.0 9.0
Total 22.9 100.0 100.0 100.0
a Data source: CFNRBHM Version JLP2_2010
b Data source: CH2M HILL, 2000 (Town of Apex and Cary IBT EIS)
c Data source: TJCOG, 2014
Other Jordan Lake Withdrawal Assumptions
In order to isolate increased IBT impacts from the impacts of increased use of the Jordan
Lake water supply pool, all of the 2045 scenarios assume full allocation and use of the
Jordan Lake water supply pool (total average annual demand = 100 mgd). For all scenarios,
except the 2010 Baseline scenario, withdrawals from Jordan Lake total 100 mgd on an
average annual basis.
Table 3 provides a summary of the projected water use by all current and future Jordan
Lake allocation holders in 2045; the difference between the 100 mgd Jordan Lake water
supply and the allocation holders projected use defines the “Other” Jordan Lake
withdrawals (also presented in Table 3). It was assumed that 50 percent of the Other Jordan
Lake withdrawals are returned downstream of Jordan Lake dam.
Figure 4 presents a comparison of the 2045 model results without full utilization of the
water supply pool and the 2045 Baseline scenario with the full utilization of the water
supply pool, showing the influence of the full utilization.

MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
14
FIGURE 4
Jordan Lake Water Supply Pool Utilization Comparison

Scenario Descriptions
Descriptions of the hydrologic model scenarios are provided in Table 4.
TABLE 4
Summary of Hydrologic Model Scenario Components
Model Scenario a
Component
2010
Baseline
2045
Baseline
2045
Requested
IBT
2045
Increased
Neuse
Discharge IBT
EA Alternative
1, 3a – 3e
EA Alternative
2a
EA Alternative
2b
Continue Existing IBT Yes Yes Yes Yes
Increased IBT No No Yes Yes
Jordan Lake Drought Contingency
Plan – Turned on in CFNRBHM Yes Yes Yes Yes
Water Shortage Response Plans –
Turned on in CFNRBHM Yes Yes Yes Yes
Cary/Apex Jordan Lake Average Day
Withdrawal (mgd)b 20.7 32.8 45.9 45.9
Non-Cary/Apex Projected Jordan
Lake Average Day Withdrawal (mgd)c 2.2 45.1 45.1 45.1
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2045 Baseline Scenario (Jordan Lake water supply pool 100% utilized)
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TABLE 4
Summary of Hydrologic Model Scenario Components
Model Scenario a
Component
2010
Baseline
2045
Baseline
2045
Requested
IBT
2045
Increased
Neuse
Discharge IBT
EA Alternative
1, 3a – 3e
EA Alternative
2a
EA Alternative
2b
Other Jordan Lake Average Day
Withdrawal (mgd) N/A 22.1 9.0 9.0
Total Jordan Lake Average Day
Demands (mgd) 22.9 100.0 100.0 100.0
Cary/Apex Water Treatment Plant
Process Water - Average Day
Discharges (mgd)
3.1 2.6d 6.6 6.6
Cary/Apex Cape Fear River Basin
Average Day WRF Discharges (mgd) 2.1 12.7 12.8 5.0
Cary/Apex Neuse River Basin
Average Day WRF Discharges (mgd) 14.1 8.4 22.3 30.1
Cary/Apex Average Day IBT (mgd)e, f 16 15 24 32
Cary/Apex Maximum Month Average
Day IBT (mgd) e, f 19 22 33 44
N/A – Not applicable
a Numbers have been rounded
b Includes the Town of Apex, Cary, Morrisville and RTP South
c Includes Chatham County, Hillsborough, Orange County, Orange Water and Sewer Authority, Pittsboro,
Holly Springs, and the City of Durham as listed in Table 3
d Based on 8% WTP process water loss (2000 EIS analysis assumption)
e IBT values have been rounded to whole numbers.
f 2010 IBT value based on input data to CFNRBHM; 2045 IBT values projected based on forecasting data
provided in the Towns’ LRWRP (CH2M HILL, 2013).
Modeling Results
Each scenario was run using the CFNRBHM and scenario results were compared. The
model was run on a daily time step and included the Jordan Lake Drought Contingency
Plan.
Numerical and graphical methods were used to evaluate the differences between each
scenario. The key hydrologic indicators, previously described, were evaluated by running
the scenarios and doing a direct day to day comparison of reservoir elevations and
discharges for each scenario; e.g., 2010 Baseline vs. 2045 Baseline vs. 2045 Requested IBT.
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
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Scenario Comparisons
Tabular comparisons and plots are provided in this section for the key hydrologic indicators
to illustrate the similarities or differences that were calculated between the scenarios. The
results included are time series and frequency (duration) curves. The time series plots
include the details on the following:
 Entire simulation (period of record)
 1950’s drought
 2002 drought
 2007 drought
Jordan Lake Elevation
A summary of the average and minimum reservoir water surface elevations for the period
of record and the drought periods is provided in Table 5.
TABLE 5
Model Scenario Comparison – Jordan Lake Water Surface Elevation
Scenario
Elevation Over the
Period of Record
(feet)
Elevation During the
1950’s Drought
(feet)
Elevation During the
2002 Drought
(feet)
Elevation During the
2007 Drought
(feet)
Average Minimum Average Minimum Average Minimum Average Minimum
2010
Baseline 216.3 209.7 215.4 210.1 214.8 209.7 215.3 210.2
2045
Baseline 216.0 207.5 214.8 207.5 214.2 208.4 214.5 207.7
2045
Requested
IBT
215.9 207.3 214.7 207.3 214.2 208.0 214.4 207.4
2045
Increased
Neuse
Discharge
IBT
215.9 207.2 214.7 207.2 214.1 207.9 214.4 207.3
The normal operating pool for Jordan Lake is 216 feet above mean sea level (MSL). The
average for the period of record is consistently maintained at the normal operating level for
all scenarios. A review of the lake elevations during drought conditions shows average
elevations approximately one foot below the normal operating level. The largest difference
during the drought periods is greatest between the 2010 and 2045 baseline scenarios. This
difference, as well as the difference in the minimum elevations presented in Table 5, can be
attributed primarily to the growth in future withdrawals in the Cape Fear River basin, as
well as the assumed full utilization of the Jordan Lake water supply pool in 2045.
Figures 5 through 8 present the time series plots for the full period of record and the 1950’s,
2002, and 2007 drought periods, respectively.
An elevation-duration plot of Jordan Lake is provided in Figure 9. This plot shows the
percent of time that the reservoir level falls below a certain elevation.
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FIGURE 5
Period of Record Jordan Lake Elevation Comparison

FIGURE 6
1950’s Drought Jordan Lake Elevation Comparison

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FIGURE 7
2002 Drought Jordan Lake Elevation Comparison

FIGURE 8
2007 Drought Jordan Lake Elevation Comparison

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FIGURE 9
Period of Record Jordan Lake Elevation Duration Comparison

Water Quality Pool
Table 6 provides a summary of the average and minimum percentage of water quality pool
storage volume during the period of record and drought periods.
TABLE 6
Model Scenario Comparison - Water Quality (WQ) Pool Percent of Storage Volume
Scenario
WQ Pool Storage
Over the
Period of Record
(percent)
WQ Pool Storage
During the
1950’s Drought
(percent)
WQ Pool Storage
During the
2002 Drought
(percent)
WQ Pool Storage
During the
2007 Drought
(percent)
Average Minimum Average Minimum Average Minimum Average Minimum
2010
Baseline 93.3 21.0 85.3 22.3 80.7 21.0 85.6 26.7
2045
Baseline 92.6 33.1 85.5 33.5 81.7 37.7 84.4 33.1
2045
Requested
IBT
92.3 31.9 85.0 32.4 81.2 36.4 83.7 31.9
2045
Increased
Neuse
Discharge
IBT
92.1 30.9 84.5 31.5 80.6 35.4 83.1 30.9

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20
The average water quality pool storage volume percentage for the period of record is similar
for all scenarios, approximately 93 percent, with the 2045 Increased Neuse Discharge IBT
scenario closer to 92 percent. A review of the percentage of storage volume during drought
conditions shows that for the simulated 1950’s and 2002 drought periods, the 2010 Baseline
scenario water quality pool volume is actually lower than the 2045 Baseline and 2045
Requested IBT scenarios. This can be attributed to the return of wastewater effluent to the
Cape Fear River from the WWRWRF discharge. This return counts as a direct credit to the
target flows at Lillington, requiring a smaller discharge from Jordan Lake and effectively
preserving the water quality pool storage volume.
Figures 10 through 13 present the time series plots for the full period of record and the
1950’s, 2002, and 2007 drought periods, respectively.
A storage volume-duration plot for the water quality pool is provided in Figure 14. This plot
shows the percent of time that the water quality pool is below a certain percentage of the
pool’s total storage volume.
FIGURE 10
Period of Record Water Quality Pool Storage Volume Percent Comparison

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FIGURE 11
1950’s Drought Water Quality Pool Storage Volume Percent Comparison

FIGURE 12
2002 Drought Water Quality Pool Storage Volume Percent Comparison

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FIGURE 13
2007 Drought Water Quality Pool Storage Volume Percent Comparison

FIGURE14
Period of Record Water Quality Pool Storage Volume Duration Comparison

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Water Supply Pool
Table 7 provides a summary of the average and minimum percentage of water supply pool
storage volume during the period of record and drought periods.
TABLE 7
Model Scenario Comparison - Water Supply (WS) Pool Percent of Storage Volume
Scenario
WS Pool Storage
Over the
Period of Record
(percent)
WS Pool Storage
During the
1950’s Drought
(percent)
WS Pool Storage
During the
2002 Drought
(percent)
WS Pool Storage
During the
2007 Drought
(percent)
Average Minimum Average Minimum Average Minimum Average Minimum
2010
Baseline 99.8 90.7 99.2 90.7 99.3 93.8 99.7 94.4
2045
Baseline 94.1 32.1 86.8 32.6 85.7 38.8 85.1 37.8
2045
Requested
IBT
93.7 31.4 86.0 31.4 85.1 34.9 84.0 35.0
2045
Increased
Neuse
Discharge
IBT
93.7 31.4 85.9 31.4 85.1 34.9 83.9 35.0
The average and minimum water supply pool storage volume percentage for the period of
record is similar for all 2045 scenarios, with the largest difference between with 2045
scenarios and the 2010 Baseline scenario being attributed to the assumed full utilization of
the water supply pool (100 mgd) in 2045. A review of the percentage of storage volume
during drought conditions shows a similar pattern as that for the period of record, but with
lower average storage volumes. No current or future allocation holder’s Jordan Lake water
supply allocation was affected by the minimum percentages presented in Table 7.
Figures 15 through 18 present the time series plots for the full period of record and the
1950’s, 2002, and 2007 drought periods, respectively.
A storage volume-duration plot for the water supply pool is provided in Figure 19. This plot
shows the percent of time that the water supply pool is below a certain percentage of the
pool’s total storage volume.

MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
24
FIGURE 15
Period of Record Water Supply Pool Storage Volume Percent Comparison

FIGURE 16
1950’s Drought Water Supply Pool Storage Volume Percent Comparison

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FIGURE 17
2002 Drought Water Supply Pool Storage Volume Percent Comparison

FIGURE 18
2007 Drought Water Supply Pool Storage Volume Percent Comparison

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FIGURE 19
Period of Record Water Supply Pool Storage Volume Percent Duration Comparison

Cape Fear River Flows at Lillington and Fayetteville
Table 8 and 9 provide a summary of the Cape Fear River average flows and low flows at
Lillington and Fayetteville, respectively, during the period of record and drought periods.
TABLE 8
Model Scenario Comparison – Cape Fear River Average and Low Flows at Lillington
Scenario
Average Period of
Record Flow
(cfs)
Percent of time
below 550 & 250
cfs during the
1950’s Drought
Percent of time
below 550 & 250
cfs during the
2002 Drought
Percent of time
below 550 & 250
cfs during the
2007 Drought
550 cfs 250 cfs 550 cfs 250 cfs 550 cfs 250 cfs
2010 Baseline 3,148 22.0% 0.0% 35.6% 0.0% 30.8% 0.0%
2045 Baseline 3,048 24.2% 2.2% 36.4% 1.2% 34.3% 4.9%
2045 Requested
IBT 3,038 24.6% 3.0% 36.8% 2.1% 34.9% 6.8%
2045 Increased
Neuse Discharge
IBT
3,026 25.1% 4.3% 37.3% 2.8% 35.0% 8.9%
NOTE: 550 cfs and 250 cfs were selected for presentation based on the Jordan Lake Drought Contingency
Plan flow targets at the Lillington USGS gage.
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TABLE 9
Model Scenario Comparison – Cape Fear River Average and Low Flows at Fayetteville
Scenario
Average Period of
Record Flow
(cfs)
Percent of time
below 600 cfs
during the 1950’s
Drought
Percent of time
below 600 cfs
during the 2002
Drought
Percent of time
below 600 cfs
during the 2007
Drought
2010 Baseline 4,190 12.5% 18.3% 16.4%
2045 Baseline 4,100 12.7% 19.5% 16.6%
2045 Requested
IBT 4,090 12.9% 19.9% 16.8%
2045 Increased
Neuse Discharge
IBT
4,079 13.1% 20.2% 17.1%
NOTE: 600 cfs was selected for presentation to provide an indication of the frequency of low flow events in
the Cape Fear River near Fayetteville.
A comparison of river flows for the 2010 Baseline scenario and 2045 scenarios was
performed for flows at Lillington and Fayetteville. As shown in Tables 8 and 9, the largest
difference in average period of record flow (approximately 100 cubic feet per second [cfs]) is
between the 2010 and 2045 Baseline scenarios due to the increased future withdrawals
within the Cape Fear River basin and the assumed full utilization of the Jordan Lake water
supply pool. There is an increase in frequency of lower flows in the Cape Fear River at both
locations, but similar to the average flows the largest difference is related to increased future
withdrawals in the basin and the assumed full utilization of the water supply pool.
The Jordan Lake operating rules, which are built into the CFNRBHM, focus on maintaining
flood control capabilities and river flows below the dam. For this reason, river flows are
predominantly the same in all scenarios over the full range of flows in the Cape Fear River;
Figures 20 through 27 presents the time series plots for the full period of record and the
1950’s, 2002, and 2007 drought periods, for Cape Fear River flows below 600 cfs at Lillington
and Fayetteville.
A flow-duration plot for the Cape Fear River flows, below 600 cfs, at Lillington and
Fayetteville is provided in Figure 28 and 29, respectively. This plot shows the percent of
time that river flow is above a specified flow rate. Figures 20 through 29 present flows
below 600 cfs (the normal Jordan Lake operations flow target at Lillington is 600 ± 50 cfs) to
provide the ability to review the results of each model scenario for low flows at Lillington
and Fayetteville.

MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
28
FIGURE 20
Period of Record Lillington Flows Comparison (Flow less than 600 cfs)

FIGURE 21
1950’s Drought Lillington Flows Comparison (Flow less than 600 cfs)

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FIGURE 22
2002 Drought Lillington Flows Comparison (Flow less than 600 cfs)

FIGURE 23
2007 Drought Lillington Flows Comparison (Flow less than 600 cfs)

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FIGURE 24
Period of Record Fayetteville Flows Comparison (Flow less than 600 cfs)

FIGURE 25
1950’s Drought Fayetteville Flows Comparison (Flow less than 600 cfs)

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MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
31
FIGURE 26
2002 Drought Fayetteville Flows Comparison (Flow less than 600 cfs)

FIGURE 27
2007 Drought Fayetteville Flows Comparison (Flow less than 600 cfs)

0
100
200
300
400
500
600
Fl
o
w

(
c
f
s
)
2045 Increased Neuse Discharge IBT 2045 Requested IBT 2045 Baseline 2010 Baseline
0
100
200
300
400
500
600
Fl
o
w

(
c
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)
2045 Increased Neuse Discharge IBT 2045 Requested IBT 2045 Baseline 2010 Baseline
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
32
FIGURE 28
Flow Duration Curve for Lillington (Flow less than 600 cfs)

FIGURE 29
Flow Duration Curve for Fayetteville (Flow less than 600 cfs)

0
100
200
300
400
500
600
0 102030405060708090100
Fl
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w

(
c
f
s
)
Percent Exceedance
2045 Increased Neuse Discharge IBT 2045 Requested IBT 2045 Baseline 2010 Baseline
0
100
200
300
400
500
600
0 102030405060708090100
Fl
o
w

(
c
f
s
)
Percent Exceedance
2045 Increased Neuse Discharge IBT 2045 Requested IBT 2045 Baseline 2010 Baseline
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
33
Jordan Lake Drought Stages
The most recent version of the CFNRBHM allows for the review of the duration and
frequency of occurrence of the drought stages within the Jordan Lake Drought Contingency
Plan, outlined in a previous section. Figures 30 through 33 present the drought stage time
series plots for the full period of record and the 1950’s, 2002, and 2007 drought periods,
respectively.
FIGURE 30
Period of Record Jordan Lake Drought Stages

0
1
2
3
4
Dr
o
u
g
h
t

L
e
v
e
l
2045 Increased Neuse Discharge IBT 2045 Requested IBT 2045 Baseline 2010 Baseline
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
34
FIGURE 31
1950’s Drought Jordan Lake Drought Stages

FIGURE 32
2002 Drought Jordan Lake Drought Stages

0
1
2
3
4
Dr
o
u
g
h
t

L
e
v
e
l
2045 Increased Neuse Discharge IBT 2045 Requested IBT 2045 Baseline 2010 Baseline
0
1
2
3
4
Dr
o
u
g
h
t

L
e
v
e
l
2045 Increased Neuse Discharge IBT 2045 Requested IBT 2045 Baseline 2010 Baseline
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
35
FIGURE 33
2007 Drought Jordan Lake Drought Stages

For all scenarios, both for the period of record and all drought periods, there is no
occurrence of a Stage 4 Drought. The frequency and duration of Drought Stages 1 and 2 for
all 2045 scenarios are greater than the 2010 Baseline, as would be expected based on the
increased withdrawals within the Cape Fear River basin and the assumed full utilization of
the water supply pool. The 2045 scenarios have a lower frequency of Stage 3 Drought
occurrences as compared to the 2010 Baseline scenario; this can be attributed to the increase
in wastewater discharge to the Cape Fear River from the WWRWRF; which is a similar
finding to the small positive effect of this discharge on the water quality pool storage
volume.
Downstream Users Water Supply Availability
Using the CFNRBHM the availability of water supply for users downstream of Jordan Lake
was evaluated. Table 10 provides a summary of the percentage of the period of record
water supply for each downstream user is available for full withdrawal. Based on the model
results, all downstream demands were met 100 percent of the time for all scenarios. No
shortages were seen as a result of future demands or an increase in IBT.
0
1
2
3
4
Dr
o
u
g
h
t

L
e
v
e
l
2045 Increased Neuse Discharge IBT 2045 Requested IBT 2045 Baseline 2010 Baseline
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
36
TABLE 10
Comparison of the Downstream User Water Supply Availability
Percentage of Time Full Water Supply Withdrawal is Available
2010
Baseline
2045
Baseline
2045
Requested IBT
2045
Increased Neuse
Discharge IBT
City of Sanford 100% 100% 100% 100%
Harnett County 100% 100% 100% 100%
Fayetteville PWC 100% 100% 100% 100%
City of Dunn 100% 100% 100% 100%
Smithfield Foods 100% 100% 100% 100%
Lower Cape Fear Water and
Sewer Authority 100% 100% 100% 100%
Cape Fear Public Utility Authority 100% 100% 100% 100%
Downstream Users Water Shortage Response Plans
The most recent version of the CFNRBHM allows for the review of the duration and
frequency of occurrence of the drought stages within a public water supply system’s (PWSS)
water shortage response plan (WSRP), if the WSRP has been built into the model. It should
be noted that not all PWSS’s WSRPs have river flow or reservoir level specific drought stage
triggers that enable them to be built into the CFNRBHM.
Currently, only one of the seven downstream users on the Cape Fear River have a WSRP
built into the CFNRBHM, the City of Dunn. The City of Dunn’s WSRP has 6 stages; with
each increasing stage there are more stringent requirements for reduced water consumption
(ranging from voluntary reductions (Stage I) to water rationing (Stage VI). A review of the
model scenario results indicates the following for the simulation of Dunn’s WSRP:
 2010 Baseline: No occurrences of the City’s WSRP initiated during the period of
record.
 2045 Baseline: 6 total occurrences of the City’s WSRP initiated during the period of
record, 4 at Stage I and 2 at Stage II.
o Most occurrences are between 5 to 6 days with 1 occurrence of 3 weeks in
duration during the 2007 drought.
 2045 Requested IBT: 6 total occurrences of the City’s WSRP initiated during the
period of record, 2 at Stage I and 4 at Stage II.
o Most occurrences are between 10 to 12 days with 1 occurrence of 3.5 weeks in
duration during the 2007 drought.
 2045 Increased Neuse Discharge IBT: 7 total occurrences of the City’s WSRP
initiated during the period of record; 1 at Stage I, 4 at Stage II and 1 at Stage III
o Most occurrences between 10 to 12 days, 1 occurrence of Stage II for 3 weeks
in duration during the 1950’s drought and 1 occurrence of Stage III for 4
weeks in duration during the 2007 drought.
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
37
Fayetteville PWC’s and Harnett County’s WSRPs are not built into the CFNRBHM, but each
has one explicit flow based trigger within its WSRP. Their WSRP Water Conservation Stage
II, Water Shortage Warning, are triggered when flow in the Cape Fear River, at the
Lillington USGS gage, falls below 250 cfs. A review of the model scenario results (focusing
on non-transient events lasting longer than 3 days) outside of the CFNRBHM indicates the
following for the frequency and duration of occurrence for Stage II of Fayetteville PWC’s
and Harnett County’s WSRPs:
 2010 Baseline: No occurrences of the Fayetteville PWC or the Harnett County WSRP
Water Conservation Stage II.
 2045 Baseline: 9 total occurrences of the Fayetteville PWC and Harnett County
WSRP Water Conservation Stage II over the period of record.
o Occurrences range between 2 and 22 days in duration and are primarily
during the simulated historic drought periods (e.g. 1950’s, 2002, and 2007).
 2045 Requested IBT: 10 total occurrences of the Fayetteville PWC and Harnett
County WSRP Water Conservation Stage II over the period of record.
o Occurrences range between 1 and 24 days in duration and are primarily
during the simulated historic drought periods.
 2045 Increased Neuse Discharge IBT: 13 total occurrences of the Fayetteville PWC
and Harnett County WSRP Water Conservation Stage II over the period of record.
o Occurrences range between 4 and 25 days in duration and are primarily
during the simulated historic drought periods.
The increase in WSRP implementation occurrences for Dunn, Fayetteville PWC and Harnett
County from the 2010 Baseline scenario to the 2045 scenarios is attributed to the increase in
water supply withdrawals within the Cape Fear River basin, including the assumed full
utilization of the Jordan Lake water supply pool. The 2045 Requested IBT model scenario is
not significantly different in frequency or duration of WSRP implementation occurrences
when compared to the 2045 Baseline scenario.
Summary and Conclusions
To summarize the results of the hydrologic modeling, Table 11 shows the frequency with
which the following conditions occur for each model scenario:
 Jordan Lake Levels < 210 ft. MSL (lower limit for boat ramp use)
 Jordan Lake Levels < 210 ft. MSL (lower limit for boat ramp use); between Memorial
Day and Labor Day
 Water Quality Pool < 80% (Stage 1 Drought trigger, per Drought Contingency Plan)
 Water Quality Pool < 60% (Stage 2 Drought trigger, per Drought Contingency Plan)
 Water Quality Pool < 40% (Stage 3 Drought trigger, per Drought Contingency Plan)
 Water Quality Pool < 20% (Stage 4 Drought trigger, per Drought Contingency Plan)
 Water Supply Pool < 50%
 Cape Fear River Flow at Lillington < 550 cfs (normal target flow is 600 ± 50 cfs)
 Cape Fear River Flow at Fayetteville < 600 cfs
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
38
TABLE 11
Comparison of the Percentage of the Period of Record that the Key Hydrologic Indicators are Met
Scenario
2010
Baseline
2045
Baseline
2045
Requested IBT
2045
Increased Neuse
Discharge IBT
Hydrologic Indicator Baseline
EA Alternative
1 & 3a-e
No Action &
Avoid IBT
Certificate
Modification
EA Alternative 2a
Modify IBT
Certificate
(Proposed
Alternative)
EA Alternative 2b
Modify IBT
Certificate
(Increased Neuse
Discharge IBT)
Jordan Lake Level < 210 ft. MSL 0.0% 1.6% 2.0% 2.0%
Jordan Lake Level < 210 ft. MSL,
Memorial Day to Labor Day 0.0% 0.2% 0.3% 0.4%
Water Quality Pool <80% 13.5% 15.8% 16.4% 16.9%
Water Quality Pool <60% 5.6% 5.9% 6.4% 6.5%
Water Quality Pool <40% 0.9% 0.5% 0.7% 0.8%
Water Quality Pool <20% 0.0% 0.0% 0.0% 0.0%
Water Supply Pool <50% 0.0% 1.6% 1.9% 1.9%
Flow at Lillington < 550 cfs 13.9% 15.6% 15.9% 16.4%
Flow at Fayetteville < 600 cfs 5.9% 6.1% 6.3% 6.7%
The results presented throughout this TM and summarized in Table 11 show a small shift in
lake level and Cape Fear River flow from the 2010 to 2045 Baseline scenarios, as well as a
potential for increases in WSRP implementation for downstream PWSSs; all of these factors
are attributed to the assumed full utilization of the Jordan Lake water supply pool and the
increase in upstream water withdrawals. A small shift in lake level and the amount of time
the water storage pool is below 50 percent is seen between the 2045 Baseline, and 2045
Requested IBT and Neuse River Discharge IBT scenarios. The remainder of the indicators
shows negligible difference between the model scenarios, or in the case of the water quality
pool indicator the potential for a small positive impact primarily as a result of the Towns’
return of water to the Cape Fear River via the WWRWRF.
References
CH2M HILL. 2013. Long Range Water Resources Plan. Prepared for the Towns of Cary,
Apex and Morrisville and Wake County.
CH2M HILL. 2000. Final Environmental Impact Statement for RTP South and the Towns of
Cary, Apex and Morrisville for Increase in Interbasin Transfer from the Haw River Basin to
the Neuse River Basin. Prepared for the Towns of Cary, Apex and Morrisville and Wake
County.
MODELING EVALUATION OF THE EFFECTS OF THE CARY/APEX WATER SUPPLY INTERBASIN TRANSFER
39
Hydrologics. 2006. User Manual for OASIS with OCL. Raleigh, NC.
NC General Assembly. 2009. § 143-215.22L. Regulation of surface water transfers. Raleigh,
NC.
Triangle J Council of Governments (TJCOG). 2014. Draft Triangle Regional Water Supply
Plan Volume 2: Regional Water Supply Alternatives Analysis. Prepared for the Jordan Lake
Partnership.
This page has been intentionally left blank. 

Appendix EAgency Correspondence
This page has been intentionally left blank.
Comment Response Matrix
DENR Internal # 1612
Division Point of Contact Role/Office Comment Response to comment
NC Wildlife Resources 
Commission
Vann Stancil Research 
Coordinator, Habitat 
Conservation
Maintaining appropriate flows in the Cape Fear River is important for anadromous fish such as striped bass, 
American shad, and hickory shad, as well as resident aquatic species. The Cape Fear River is designated as a 
Primary Nursery Area (PNA) below Buckhorn Dam. Increased withdrawals from Jordan Reservoir and 
increased IBT to the Neuse River basin have the potential to reduce the amount of water released from 
Jordan Reservoir in the spring and impact anadromous fish. The NCWRC recommends that as much water as 
practically possible be returned to the Cape Fear River basin. Directing future infrastructure expansion to 
support the transport of wastewater to the Western Wake RWRF will help further increase the proportion of 
wastewater returned to the Cape Fear River.
Comment noted. Downstream flow releases will remain subject to USACE release 
regimes, limiting the potential for cumulative impact of water withdrawals and IBT. 
However, this concern will be noted in the cumulative impacts discussion as any 
potential hydrological changes to the Cape Fear River would be a result of the use of the 
100 mgd water supply storage allocation of Jordan Lake. 
NC Wildlife Resources 
Commission
Vann Stancil Research 
Coordinator, Habitat 
Conservation
The limited analysis presented here indicates that more water demand per capita is expected in the future; 
this assumption runs counter to the data presented in Exhibit 3‐3 that shows a decline in water demand. 
More information is needed in the EA to explain how water demand forecasts were derived and why 
projected demand appears to increase in the future.
Comment noted. Projected per capita use remains low when compared to other similar 
utilities and the national average, as discussed briefly in Section 3.9. The development of 
water demand projections for the Town's LRWRP and used in this EA was based on 
future development and land use information and took into account the need for 
reliability in meeting water demands in 2045. Water demand values presented in Exhibit 
2‐4 are as a forecast: a statistical measure of the outcome under conditions of future 
variability and uncertainty. The forecasting effort does not assume that per capita usage 
will increase; instead it incorporates variability of several uncertain yet influential 
components of the demand forecast projection including population and growth rate, 
annual variability in water use due to weather, non‐revenue water usage, and maximum 
usage peaking factors. This approach is discussed in more detail in Section 2  and 
Appendix A3 of the LRWRP, which is available on the Town's website. As stated 
throughout the LRWRP and this EA, the Towns remain committed to their existing water 
resources management tools (those measures that have resulted in the reduced unit 
demands identified in Exhibit 3‐3) and implementing new programs as appropriate for 
the communities in the future, as recommended in the LRWRP. These programs will 
increase the reliability with which the Towns can meet customer demands and comply 
with a modified IBT certificate.
NC Department of Public 
Safety Risk Management 
Section
Dan Brubaker NFIP Engineer The floodplain section should include text that indicates any development, new utility infrastructure, or 
other encroachments within the Floodway or Non‐Encroachment Area of the Special Flood Hazard Area 
(SFHA) will require a site‐specific hydraulic impact analysis to assure there will be no increase in flood levels 
at any existing structures. 
Comment noted. This information is included in 6.2.5 of the Town's SCI Master 
Management Plan, which is referenced in this EA.
NCDENR‐Division of Waste 
Management (DWM), 
Solid Waste Section
Dennis 
Shackleford
Eastern District 
Supervisor
The Section's review has seen no adverse impact on the surrounding community and likewise knows of no 
situations in the community, which would affect this project.
Comment noted.
NCDENR‐Division of Waste 
Management (DWM)
Jim Bateson Superfund Section 
Chief
CERCLIS and other contaminated sites under the jurisdiction of the Superfund site that are located within the
project study area. Since the preferred alternative for this project includes increasing the amount of water 
withdrawn from Jordan Lake for use by the Towns and Wake County, it is unlikely that the increased 
withdrawal would impact any known sites or vice versa.  
Comment Noted.  The Town exercises due diligence when planning for infrastructure and 
when acquiring land.
NCDENR Raleigh Regional 
Office
Division of Air Quality No comments.
EA provided for review by: NC Department of Environment and Natural Resources (NCDENR), NC Department of Public Safety Emergency Management, US Fish and 
Wildlife Services (USFWS), US Army Corps of Engineers (USACE)
Environmental Assessment ‐ Towns of Cary, Apex, and Morrisville and Wake County Interbasin Transfer Certificate Modification
Page 1 of 2
Comment Response Matrix
DENR Internal # 1612
Division Point of Contact Role/Office Comment Response to comment
EA provided for review by: NC Department of Environment and Natural Resources (NCDENR), NC Department of Public Safety Emergency Management, US Fish and 
Wildlife Services (USFWS), US Army Corps of Engineers (USACE)
Environmental Assessment ‐ Towns of Cary, Apex, and Morrisville and Wake County Interbasin Transfer Certificate Modification
NCDENR Raleigh Regional 
Office
Division of Water 
Resources ‐ WQROS
No permitting comments to offer.
NCDENR Raleigh Regional 
Office
Division of Water 
Resources ‐ Public 
Water Supply
No comments.
NCDENR Raleigh Regional 
Office
DEMLR (LQ & SW) The plans appear to adequately address the relevant issues associated with our specific programs. The 
applicable governments have established local programs addressing potential impacts associated with 
development of the affected areas.
Comment noted.
NCDENR Raleigh Regional 
Office
Parks & Recreation No comments.
NCDENR Raleigh Regional 
Office
Waste Management, 
Hazardous Waste 
Section
No comments.
NCDENR Raleigh Regional 
Office
DWM ‐ UST No comments.
US Fish and Wildlife 
Service (USFWS)
Sarah McRae Fish and Wildlife 
Biologist
Based on information provided and other information available, the Service concludes that the proposed 
project is not likely to adversely affect any federally‐listed endangered or threatened species, their formally 
designated critical habitat, or species currently proposed for listing under the Endangered Species Act. 
Please note for future projects that if you determine that the proposed action will have no effect (i.e., no 
beneficial or adverse, direct or indirect effect) on federally listed species, then you are not required to 
contact our office for concurrence (unless an EIS is prepared). We believe the requirements of section 
7(a)(2) of the Act have been satisfied. 
Comment noted.
Page 2 of 2
1
Robinson, Jaime/CLT
From:Sharpe, Adam/RAL
Sent:Thursday, December 11, 2014 2:27 PM
To:Robinson, Jaime/CLT; Kreutzberger, Bill/CLT
Subject:Fwd: Town of Cary & Apex Interbasin Transfer (IBT) Certificate Modification
Environmental Assessment

Sent from my iPhone

Begin forwarded message:
From: "McRae, Sarah" <[e-mail]>
Date: December 11, 2014 at 1:57:59 PM EST
To: <[e-mail]>
Subject: Re: Town of Cary & Apex Interbasin Transfer (IBT) Certificate Modification
Environmental Assessment
Dear Mr. Sharpe,
Thank you for your email, dated November 13, 2014, requesting comments from the U.S. Fish
and Wildlife Service (Service) on the Town of Cary & Apex Interbasin Transfer Certificate
Modification Environmental Assessment. Our comments are submitted pursuant to, and in
accordance with, provisions of the Endangered Species Act of 1973, as amended (16 U.S.C.
1531 et seq.) (Act).

Based on the information provided and other information available, the Service concludes that
the proposed project is not likely to adversely affect any federally-listed endangered or
threatened species, their formally designated critical habitat, or species currently proposed for
listing under the Act. Please note for future projects that if you determine that the proposed
action will have no effect (i.e., no beneficial or adverse, direct or indirect effect) on federally
listed species, then you are not required to contact our office for concurrence (unless an
Environmental Impact Statement is prepared).

We believe that the requirements of section 7(a)(2) of the Act have been satisfied. Please
remember that obligations under section 7 consultation must be reconsidered if: (1) new
information reveals impacts of this identified action that may affect listed species or critical
habitat in a manner not previously considered; (2) this action is subsequently modified in a
manner that was not considered in this review; or, (3) a new species is listed or critical habitat
determined that may be affected by the identified action.

2
Thank you for your cooperation with our agency in protecting federally listed species. If you
have any questions or comments, please contact me at this email address, or at 919-856-
4520x16.

Sincerely,

Sarah McRae

On Thu, Nov 13, 2014 at 4:32 PM, <[e-mail]> wrote:
Jean/Sarah,

Harold Brady/NCDWR has asked me to forward to both of you the Draft EA for the Towns of
Cary & Apex Interbasin Transfer (IBT) Certificate Modification for review and comment. I
have posted this EA to our FTP site, see instructions below for access.

A quick overview for you both:

Last year, Session Law 2013-388 updated the NC General Statue (GS) that regulates IBT in
NC, one of the updates to the GS provides the opportunity for the communities with an existing
IBT certificate to request a certificate modification. One of the requirements, as outlined in the
GS, for a modification is the completion of an EA. This EA has been drafted for the Towns’
requested certificate modification, reviewed by DWR and is now out for full DENR Agency
review.

The EA specifically addresses the modification of the Towns’ current IBT certificate, there is
no new infrastructure directly associated with the certificate modification and therefore none
addressed within this EA. Any future infrastructure developed will be reviewed under an
independent environmental review process. In addition, as you are both aware the Towns’
Secondary and Cumulative Impact Master Management Plan (SCIMMP) has just completed the
public review period and is in process of being finalized.

3
The 30-day Agency review period for this Draft EA will end on December 12th, 2014; so please
provide your comments by the 12th or earlier if possible (if you get through it before the
12th). If you have no comments please be sure to let us know that as well.

Please feel free to contact me with questions. I will touch base with you both via phone,
tomorrow, to make sure you have received this email and are good with access to the EA.

Thanks,
Adam

Adam Sharpe

CH2M HILL
3120 Highwoods Boulevard
Suite 214 - Magnolia Building
Raleigh, NC 27604

Office: 919-875-4311
Direct: 919-760-1772
Mobile: [phone]

www.ch2m.com

FTP Site Access:

4
Client Access Instructions for the 'pub' FTP folder
1. Click on https://transfer.ch2m.com
2. Log on with “EXT\” directly in front of the username
Username = ext\2015SCIMMP
Password = CH2MHill
3. Enter the password and click OK
4. Navigate to the folder and double click on the folder to open “2015_SCIMMP”; (then open the
“Apex-Cary_IBT_EA” folder)
5. Double click the file to read or use the “Upload” button to add a file to this folder (copy and pasting a file
to this location is not available as this is a website)

--
Sarah McRae
Aquatic Endangered Species Biologist
US Fish and Wildlife Service
PO Box 33726
Raleigh, NC 27636-3726

office phone: [phone]x16 (M, W, F)
telework phone: [phone] (T, Th)
fax: [phone]
email: [e-mail]
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