HomeMy WebLinkAboutKLRWS-IBT-2016-AnnualReport This document has been prepared in accordance with the Kerr Lake Regional Water System’s 2015 Interbasin Transfer Certificate.
Interbasin Transfer Annual Report
Calendar Year 2016
Submitted by
Kerr Lake Regional Water System
2/10/2017
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
2
This page has been intentionally left blank.
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
3
Executive Summary
The 2016 Annual Report on Interbasin Transfers (IBTs) for the Partners of the Kerr Lake Regional Water
System (KLRWS) includes monitoring data for tracking of IBT amounts as well as documentation of
compliance with all 2015 IBT Certificate conditions. The Partners include the City of Henderson, City of
Oxford, and Warren County. Transfer amounts for their wholesale customers listed as co-applicants in
the IBT Certificate are also included.
On November 5, 2015, the North Carolina Environmental Management Commission (EMC) approved the
Partners’ IBT certificate, authorizing a total transfer from the Roanoke River basin of 14.2 million gallons
per day (mgd) measured as the maximum month transfer’s average day (MMAD). As the KLRWS IBT
certification is comprised of transfer to three separate basins, each must be considered independently.
The EMC approved an IBT of 10.7 mgd to the Tar River basin, 1.7 mgd to the Fishing Creek basin, and 1.8
mgd to the Neuse River basin.
In 2016 the Partners complied with all conditions of their IBT Certificate. The actual MMAD amount of
water transferred from the Roanoke River basin to the Tar River basin was 3.1 mgd, less than 29% of the
authorized value. Similarly, the MMAD transferred from the Roanoke River basin to the Fishing Creek
basin was 0.9 mgd, less than 53% of the authorized amount. In addition, the MMAD amount of water
transferred from the Roanoke to the Neuse River basin was 0.1 mgd, less than 5% of its authorized
amount. In total, the MMAD amount of water transferred from the Roanoke was less than 38% of the
authorized amount. IBT amounts for 2016 are provided in Table ES-1 and Figure ES-1.
Table ES-1
IBT Maximum Month Average Day Demands for the KLRWS
Total Transfer Tar River Basin Fishing Creek Basin Neuse River Basin
Year Water Transfer
(mgd)
Water
Transfer
(mgd)
IBT as % of
Certificate
Water
Transfer
(mgd)
IBT as % of
Certificate
Water
Transfer
(mgd)
IBT as % of
Certificate
MMAD MMAD % MMAD % MMAD %
2016 5.4 3.1 28.9 0.9 52.9 0.1 5.5
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
4
Figure ES-1
Total transfer from the Roanoke River Basin on the average day of each calendar month during 2016
4.7 4.5 4.2 4.2 4.7 5.0 5.0 5.4 4.9 4.5 4.6 4.1
0.01.02.03.04.05.06.07.08.09.010.011.012.013.014.015.0
0.3 0.3 0.3 0.3 0.4 0.5 0.4 0.5 0.4 0.3 0.4 0.3
IB
T
(
m
g
d
)
2016 Average Day Total IBT
Certificate Limit
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
5
Table of Contents
Executive Summary ............................................................................................................................ 3
Acronyms and Abbreviations .............................................................................................................. 5
1 Introduction .......................................................................................................................... 7
1.1 System Overview ................................................................................................................ 7
2 Interbasin Transfer Monitoring............................................................................................... 8
2.1 Service Area Water Demand ............................................................................................... 8
2.2 Interbasin Transfers ............................................................................................................ 9
3 Compliance with Certification Conditions ............................................................................. 12
3.1 Condition 1—Water Conservation Plan ............................................................................ 13
3.2 Condition 2—Drought Management Plan ........................................................................ 13
3.3 Condition 3—Compliance and Monitoring Plan ............................................................... 14
3.4 Condition 4— Availability of Alternative Water Source ................................................... 14
3.5 Condition 5—Amendment of Authorized IBT Amount ..................................................... 15
3.6 Condition 6—Reselling of Water ...................................................................................... 15
3.7 Condition 7—Limitation of Certificate .............................................................................. 15
4 References ........................................................................................................................... 16
Acronyms and Abbreviations
EA Environmental Assessment
FONSI Finding of No Significant Impact
I&I Inflow and infiltration
IBT Interbasin transfer
Kerr Lake John H. Kerr Reservoir
KLRWS Kerr Lake Regional Water System
LWSP Local Water Supply Plan
MG
mgd
Million Gallons
million gallons per day
MMAD average day of a maximum month
NCDEQ North Carolina Department of Environmental Quality
NCDWR North Carolina Division of Water Resources
NC EMC North Carolina Environmental Management Commission
SGWSA South Granville Water and Sewer Authority
WSRP Water Shortage Response Plan
WWTP Wastewater Treatment Plant
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
6
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
7
1 Introduction
On November 5, 2015, the North Carolina Environmental Management Commission (EMC) granted an
interbasin transfer (IBT) certificate to the Kerr Lake Regional Water System (KLRWS). Permitted transfers
from the Roanoke River basin include: 10.7 million gallons per day (mgd) to the Tar River basin, 1.7 mgd
to the Fishing Creek basin, and 1.8 mgd to the Neuse River basin measured as the maximum month
transfer’s average day (MMAD).
The owners of the KLRWS and primary bulk customers served by the system are the City of Henderson,
the City of Oxford, and Warren County, known as the “Partners.” Ownership responsibility is 60 percent,
20 percent, and 20 percent, respectively. They also currently sell water to secondary bulk customers
listed as co-applicants in their IBT Certificate including Stovall, Warrenton, Norlina, Vance County,
Kittrell, and Franklin County. Future sales will occur from Oxford to South Granville Water and Sewer
Authority (SGWSA) for use in Creedmoor’s service area. Franklin County owns the Youngsville water
system and also sells water to Bunn and Lake Royale. Water sales are shown in Figure 1-1.
Figure 1-1
Diagram of sales from the Partners of the KLRWS to their secondary bulk customers
KLRWS
City of Oxford
Stovall
Granville
County
SGWSA
(future)
City of
Henderson
Franklin
County
Bunn
Lake Royale
Kittrell
Vance
County
Warren
County
Warrenton
Norlina
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
8
2 Interbasin Transfer Monitoring
The combined transfer from the Roanoke River basin and the amount of transfer to each river basin will
be calculated and presented as average values for each calendar month. The methodology for
calculating the daily IBT amount is consistent with NCDWR guidelines for estimating IBT amounts as part
of the local water supply planning process (NCDWR, 2009) and is described in detail in the Partners’
Interbasin Transfer Compliance and Monitoring Plan (CH2M, 2016a).
The KLRWS is a complex network of water systems and, to calculate IBT, tracking of sales to other
parties and wastewater discharges is necessary. Water is transferred (and not returned to the Roanoke
River basin) via potable water consumptive use and wastewater discharge. Daily IBT is calculated based
on a combination of sales data and assumptions including the percentage of each customer’s service
area in each river basin as reported in the previous year’s Local Water Supply Plans (LWSPs). Daily IBT
data are then used to calculate the IBT certificate compliance metric – IBT calculated as the daily
average of a calendar month.
2.1 Service Area Water Demand
Table 2-1 presents 2016 annual average water use of the IBT Certificate Holders based on the amount of
water withdrawn from the source basin (Roanoke River Basin). The total water use is the sum of the
daily withdrawal from Kerr Lake, found in the “data entry” section of IBT Tracking spreadsheet, which is
equal to 2,368 MG. Similarly, the average day withdrawal from the Kerr Lake during 2016 was 6.48 mgd,
which is less than the USACE allocated water storage amount of 20 mgd. In addition, the highest usage
occurred during August, with an average of 7.2 mgd withdrawn.
Table 2-1
Withdrawal from Kerr Lake for 2016
Withdrawal (mgd)
Total Annual Water 2,368
Annual Average Day 6.48
Maximum Month Average Day (August) 7.29
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
9
2.2 Interbasin Transfers
In 2016, the greatest amount of water was transferred during August. During this month, 4.0 mgd was
transferred to the Tar River Basin, 1.2 mgd was transferred to the Fishing Creek Subbasin and0.2 mgd
was transferred to the Neuse River Basin. A total of 7.3 mgd was withdrawn from the Roanoke River
Basin and 2.4 mgd was returned. Due to the large expanse of the total water service area and the use of
storage tanks, water age can average up to 3 days. This impacts IBT data calculation in that water
returned and transferred on average does not exactly match the water withdrawn for a given period.
Therefore, the total IBT from the source basin during the maximum month average day in 2016 was 5.4
mgd (Table 2-2). Figures 2-1 through 2-4 summarize the water use and transfers by month.
Table 2-2
Water transfer summary by month for 2016
Monthly Summary (mgd)
Date Withdrawal Return to Interbasin Transfer to Total IBT
Month Roanoke Roanoke Tar Fishing Creek Neuse
10.7 1.7 1.8 14.2
January 6.1 1.8 3.8 0.9 0.1 4.7
February 6.8 2.4 3.5 0.9 0.1 4.5
March 6.0 2.3 3.1 1.0 0.1 4.2
April 6.0 2.2 3.1 1.0 0.1 4.2
May 6.4 2.6 3.3 1.2 0.1 4.7
June 7.0 2.7 3.7 1.2 0.2 5.0
July 6.8 2.6 3.7 1.2 0.1 5.0
August 7.3 2.4 4.0 1.2 0.2 5.4
September 6.7 2.2 3.6 1.2 0.1 4.9
October 6.6 2.2 3.4 0.9 0.1 4.5
November 6.1 1.9 3.4 1.1 0.2 4.6
December 5.7 2.0 3.1 0.9 0.1 4.1
Maximum
Month
Average Day
5.7 2.0 3.1 .9 .1 5.4
Note: Water sales to Henderson, Oxford, and Warren Co. are metered as water leaves the KLRWS WTP. Each manages
its own water distribution network, including storage tanks, and wastewater treatment systems.
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
10
Figure 2-1
Transfer from the Roanoke River Basin to the Tar River Basin for the average day of each calendar month during
2016
Figure 2-2
Transfer from the Roanoke River Basin to the Fishing Creek Subbasin for the average day of each calendar month
during 2016
0.9 0.9 1.0 1.0
1.2 1.2 1.2 1.2 1.2
0.9 1.1 0.9
0.0
0.5
1.0
1.5
2.0
2.5
3.0
IB
T
(
m
g
d
)
2016 Average Day Transfer to Fishing
Creek
Certificate Limit
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
11
Figure 2-3
Transfer from the Roanoke River Basin to the Neuse River Basin for the average day of each calendar month during
2016
Figure 2-4
Total transfer from the Roanoke River Basin on the average day of each calendar month during 2016
0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.2 0.1 0.1 0.2 0.1
0.0
0.5
1.0
1.5
2.0
2.5
3.0
IB
T
(
m
g
d
)
2016 Average Day Transfer to Neuse River
Certificate Limit
4.7 4.5 4.2 4.2 4.7 5.0 5.0 5.4 4.9 4.5 4.6 4.1
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
0.3 0.3 0.3 0.3 0.4 0.5 0.4 0.5 0.4 0.3 0.4 0.3
IB
T
(
m
g
d
)
2016 Average Day Total IBT
Certificate Limit
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
12
Figure 2-5
The amount of water returned to the source basin for the average day of each calendar month during 2016
3 Compliance with Certification Conditions
A summary of the conditions of the IBT Certificate approved on November 5, 2015 as well as a
description of the current status of each condition is provided below. A quotation from the
corresponding passage in the IBT Certificate is italicized, followed by the 2016 actions for each
condition, if applicable.
1.8 2.4 2.3 2.2 2.6 2.7 2.6 2.4 2.2 2.2 1.9 2.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
Re
t
u
r
n
(
m
g
d
)
2016 Average Day Return to Roanoke
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
13
3.1 Condition 1—Water Conservation Plan
Within 90 days of receipt of the Interbasin Transfer Certificate, the Kerr Lake Regional Water System
shall prepare and submit a water conservation plan subject to approval by the Division of Water
Resources (Division) that specifies the water conservation measures, including a rate pricing structure, to
be implemented by the partners to ensure the efficient use of the transferred water. Except in
circumstances of technical or economic infeasibility or adverse environmental impact, the water
conservation plan shall provide the mandatory implementation of water conservation measures that
equal or exceed the most stringent water conservation plan implemented by a public water system that
withdraws water from the source basin. All bulk water customers of the Kerr Lake Regional Water
System, as identified in this Interbasin Transfer Certificate, shall implement a water conservation plan at
least as stringent as the requirements imposed on the Kerr Lake Regional Water System. The Certificate
Holders shall not transfer any water to any other unit of local government unless that unit of local
government agrees to be bound by this condition in full.
The Water Conservation Plan was submitted within 90 days to NCDWR and is available on both the
KLRWS website and NCDWR’s website (CH2M, 2016b).
In 2016, the following improvements were made by the Partners and their wholesale customers to
conserve water:
Completion of a master meter audit for wholesale customers
Augmentation of the meter auditing and leak detection programs
Development of education and outreach programs for the public and increased outreach
activities and tours of the KLRWS water treatment plant
3.2 Condition 2—Drought Management Plan
Within 90 days of receipt of the Interbasin Transfer Certificate, the Kerr Lake Regional Water System
shall prepare and submit a drought management plan subject to approval by the Division that specifies
how the transfer shall be managed to protect the source river basin (Roanoke River basin) during
drought conditions or other emergencies that occur within the source river basin. Except in
circumstances of technical or economic infeasibility or adverse environmental impact, this drought
management plan shall include mandatory reductions in the permitted amount of the transfer based on
the severity and duration of a drought occurring within the source river basin and shall provide for
mandatory implementation of a drought management plan by the Kerr Laker Regional Water System
that equals or exceeds the most stringent drought management plan implemented by a public water
system that withdrawals water from the source river basin. All bulk water customers of Kerr Lake
Regional Water System, as identified in this Interbasin Transfer Certificate, shall implement a drought
management plan at least as stringent as the requirements imposed on the Kerr Lake Regional Water
System. The Certificate Holders shall not transfer any water to any other unit of local government unless
that unit of local government agrees to be bound by this condition in full.
The 2015 Drought Management Plan was submitted within 90 days and is available on both the KLRWS
website and NCDWR’s website. The plan describes the chain of events to occur in the event of a water
shortage, as declared by the City Manager of the City of Henderson given specified elevations of the
lake. Each wholesale customer’s WSRP is at least as stringent as that of the KLRWS (CH2M, 2016c).
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
14
Table 3-1 includes an overview of the Kerr Lake level over the course of the year and corresponding
drought response measures taken, if any. During 2016, drought management steps were not initiated
due to sufficiently elevated lake levels.
Table 3-1
Periods of Drought and Normal Conditions in Kerr Lake
Drought Stage
(by Lake Elevation)
Drought Monitor Classification Duration of Condition Action by Partners and
Customers
Normal JAN 2016 – DEC 2016 N/A
Below 294 feet Voluntary Conservation NONE
Below 289 feet Mandatory Conservation NONE
Below 284 feet Water Shortage Emergency NONE
3.3 Condition 3—Compliance and Monitoring Plan
Within 90 days of receipt of the Interbasin Transfer Certificate, the Kerr Lake Regional Water System
shall prepare and submit a quarterly compliance and monitoring plan subject to approval by the Division.
The plan shall include methodologies and reporting schedules for reporting the following information:
daily transfer amount calculated as the average daily over the maximum month, compliance with
certificate 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 shall have the
authority to make modifications to the compliance and monitoring plan as necessary to assess
compliance with the certificate. The quarterly compliance and monitoring report shall be submitted to
the Commission no later than 30 days after the end of the quarter. The Kerr Lake Regional Water System
shall employ any methods or install and operate any devices needed to measure the amount of water
that is transferred during each calendar quarter, calculated as daily average of a calendar month.
The Compliance and Monitoring Plan was submitted within 90 days to NCDWR and is available on both
the KLRWS website and NCDWR’s website (CH2M, 2016a).
Data was compiled according to the methodology outlined in the 2015 Compliance and Monitoring Plan.
The combined transfer from the Roanoke River basin was calculated on a monthly basis. Water
transferred to each of the Partners or their customers was calculated individually on a daily basis if
possible.
At the end of each quarter in 2016, the KLRWS calculated the daily average IBT amount for each month
in the quarter and submitted a brief fact sheet summary to NCDWR.
3.4 Condition 4— Availability of Alternative Water Source
The Commission may amend the certificate to reduce the maximum amount of water authorized to be
transferred whenever it appears that an alternative source of water is available to the certificate holder
from within the receiving river basin, including, but not limited to, the purchase of water from another
water supplier within the receiving basin or to the transfer of water from another sub-basin within the
receiving major river basin.
This condition requires no action by the Partners.
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
15
3.5 Condition 5—Amendment of Authorized IBT Amount
The Commission shall amend the certificate to reduce the maximum amount of water authorized to be
transferred if the KLRWS’s actual future water needs are significantly less than the KLRWS’s projected
water needs at the time the certificate was granted.
This condition requires no action by the Partners.
3.6 Condition 6—Reselling of Water
The KLRWS shall not resell the water that would be transferred pursuant to the certificate to another
public water system. This limitation shall not apply in the case of a proposed resale or transfer among
public water systems within the receiving river basin as part of an inter-local agreement or other regional
water supply arrangement, provided that each participant in the inter-local agreement or regional water
supply arrangement is a co-applicant for the certificate and will be subject to all the terms, conditions,
and limitations made applicable to any lead or primary applicant.
This condition requires no action by the Partners.
3.7 Condition 7—Limitation of Certificate
If the Commission determines that information in the record material to its Findings of Fact, pursuant to
NCGS § 143-215.22L(k), was erroneous, incomplete, or otherwise contained material misrepresentations,
misstatements, or misinterpretations the Commission may reopen and modify or revoke this Certificate
to ensure continued compliance with NCGS Chapter 143, Article 21, Part 2A.
This condition requires no action by the Partners.
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
16
4 References
CH2M HILL, Inc. (CH2M). 2016a. Compliance and Monitoring Plan. Prepared for Kerr Lake Regional
Water System. Raleigh, North Carolina. February 2016. https://ncdenr.s3.amazonaws.com/s3fs-
public/Water%20Resources/files/ibt/Kerr/KLRWS_IBT_ComplianceMonitoringPlan_Final.pdf.
CH2M HILL, Inc. (CH2M). 2016b. Water Conservation Plan. Prepared for Kerr Lake Regional Water
System. Raleigh, North Carolina. February 2016. https://ncdenr.s3.amazonaws.com/s3fs-
public/Water%20Resources/files/ibt/Kerr/KLRWS_IBT_WaterConservation_Final.pdf.
CH2M HILL, Inc. (CH2M). 2016c. Drought Management Plan. Prepared for Kerr Lake Regional Water
System. Raleigh, North Carolina. February 2016. https://ncdenr.s3.amazonaws.com/s3fs-
public/Water%20Resources/files/ibt/Kerr/KLRWS_IBT_DroughtManagementPlan_Final.pdf.
North Carolina Division of Water Resources (NCDWR). 2009. Regulation of Surface Water Transfers
Statutory Guidance. http://www.ncwater.org/files/IBT_guidance_v1.pdf. Accessed April 10, 2015.
North Carolina Environmental Management Commission (NC EMC). 2015. Certificate Authorizing the
Interbasin Transfer from the Roanoke River basin by the Kerr Lake Regional Water System.
https://ncdenr.s3.amazonaws.com/s3fs-public/Water%20Resources/files/ibt/Kerr/Signed-IBT-
Certificate_11-05-2015.pdf.
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
17
2016 ANNUAL REPORT ON INTERBASIN TRANSFERS FOR THE KLRWS
18
This page is intentionally left blank.