2007 IBT Annual Report final

2007 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 2008

Prepared by:
Leila R. Goodwin, P.E.
Water Resources Manager
Town of Cary
P.O. Box 8005
Cary, NC 27512-8005
919-462-3846
[e-mail]

Scot Berry
Operations Analyst
Town of Cary
P.O. Box 8005
Cary, NC 27512-8005
919-319-4555
[e-mail]

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
2007...................................................................................................................A-1
Appendix B: Daily Interbasin Transfer Estimates for 2007.............................................B-1

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Executive Summary
The 2007 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 customers. Morrisville continues to hold their Jordan Lake water supply
allocation.
In 2007, the certificate holders complied with all conditions of their IBT certificate. The
maximum daily IBT amount for Cary, Apex, Morrisville, and RTP South was 23.5 million
gallons per day (mgd). The annual average IBT amount was 15.9 mgd. IBT amounts and a
summary of Jordan Lake withdrawals are provided in Table ES-1. The daily IBT amounts in
2007 for Cary, Apex, Morrisville, and RTP South are shown in Figure ES-1.
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)
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
2006
18.4
17.6
26.1
25.9
3.8
3.3
8.1
6.6
14.5
14.3
19.6
20.8
82%
87%
2007 19.8 30.8 3.8 7.7 15.9 23.5 98%
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.

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Figure ES-1: Daily Interbasin Transfer for Cary, Apex, Morrisville and RTP South
[Haw Sub-Basin to Neuse Sub-Basin]
0.00
5.00
10.00
15.00
20.001/1/20072/1/20073/1/20074/1/20075/1/20076/1/20077/1/20078/1/20079/1/200710/1/200711/1/200712/1/2007In
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Cary Apex Morrisville RTP

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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, 2007 through December 31, 2007 is included in Appendix
A. The water supply pools for each allocation holder were full on January 1, 2007.
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 their 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 2007, the maximum day withdrawal for all certificate holders was 30.8 mgd, which
occurred on August 15. The average daily withdrawal for all certificate holders was 20.1
mgd during 2007 (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 20.1 30.8
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

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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 2007, finished water demands averaged 18.0 mgd and the maximum day demand was
28.1 mgd. The maximum day peaking factor was 1.56 in 2007.

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 1.64
19992 12.6 21.5 1.70
2000 13.0 21.6 1.66
2001 14.1 22.0 1.56
2002 14.9 25.6 1.72
2003 14.0 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 18.0 28.1 1.56
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.

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Water use for 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 the allocation
storage level for 2007. The minimum storage level for the combined allocation was 78.0%
occurring on October 23, 2007. The average percent storage was 97.35% for 2007.
Figure 1. Cary/Apex/Morrisville/RTP South Water Supply Allocation and
Withdrawals for 2007
4,780
6,780
8,780
10,780
12,780
14,780
16,780
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Full Pool
= 39% of Water Supply Pool
= 17,862 acre-feet

Individual Jordan Lake water allocations are estimated on a daily basis using monthly
Morrisville and RTP South water usage records. Daily water use for Morrisville is estimated
from monthly or more frequent retail meter readings by assuming that water usage
variations between meter readings 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
meter readings. By assuming that water usage trends throughout the month follow similar
patterns as Cary. For a given day, the ratio of daily Net Cary water use to average net Cary
water use for the period between meter readings is applied to Morrisville and RTP South
metered water 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

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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”.
The daily Cary/Apex withdrawal amounts are estimated by subtracting the estimated daily
Morrisville and RTP amounts from the metered total daily use; Cary amounts are then
estimated by subtracting the daily recorded Apex use 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 2007. The minimum storage level for the Cary/Apex allocation
was 76.51% occurring on October 23, 2007. The average percent storage was 97.17% for 2007.

Figure 2. Cary/Apex/ Water Supply Allocation and Withdrawals for 2007
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
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Full Pool
= 32% of Water Supply Pool
= 14,656 acre-feet

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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 the
allocation storage level for 2007. The minimum storage level for the Morrisville allocation
was 74.57% occurring on October 23 2007. The average percent storage was 96.90% for 2007.

Figure 3. MorrisvilleWater Supply Allocation and Withdrawals for 2007
500
700
900
1,100
1,300
1,500
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Full Pool
= 3.5% of Water Supply Pool
= 1,603 acre-feet

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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 the
allocation storage level for 2007.The minimum storage level for the RTP South allocation
was 95.11% occurring on October 23 2007. The average percent storage was 99.49% for 2007.

Figure 4. RTP South Water Supply Allocation and Withdrawals for 2007
1,000
1,100
1,200
1,300
1,400
1,500
1,600
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Full Pool
= 3.5% of Water Supply Pool
= 1,603 acre-feet

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2.0 IBT Monitoring
Daily IBT estimates for the certificate holders are included in Appendix B. Estimates are
provided for the period January 1, 2007 through December 31, 2007. The maximum day IBT
transfer during the calendar year 2007 was 23.51 mgd, which occurred on August 15, 2007.
This represents 98 percent of the permitted IBT transfer under the certificate approved by
the EMC on July 12, 2001. The annual average IBT transfer was 15.9 mgd during calendar
year 2007.
The average daily consumptive use was 24% for the period January 1, 2007 through
December 31, 2007. Historical consumptive use is shown in Table 2-1.
The distribution of consumptive uses between the Haw, Cape Fear, and Neuse River
subbasins for 2007 was based on historical water use in each basin as determined by billing
records for each certificate holder. For 2007, it was assumed that 25% of water use occurred
in the Haw subbasin, 0.6% of water use occurred in the Cape Fear subbasin, and 74.4% 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 2007, based on billing records, is shown in
Table 2-2.
In 1998, 1999, and 2000 Apex and Cary implemented mandatory irrigation restrictions due
to water supply limitations and IBT permit restrictions. The Town of Morrisville asked
residents to voluntarily conserve water beginning in 1998, and implemented 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 the Towns had mandatory restrictions because of regional drought
conditions, but they were implemented after June, which was when all-time high water use
occurred. 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, 2007Apex adopted a year round alternate day
watering 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 for the remainder of 2007.

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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%
1. Includes some water use by Holly Springs. Holly Springs purchased water from Apex in 1998 and 1999.

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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%
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.

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Table 2-3 shows the combined water use for each of 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 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
2006
14.39
13.75
3.53
3.13
24.5%
22.7%
0.09
0.09
0.6%
0.6%
2007 15.52 3.98 25.6% 0.11 0.7%
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.

For purposes of calculating daily IBT amounts in 2007, the certificate holders used 25% for
the portion of their water use that occurred in the Haw subbasin and 0.6% as the portion
used in the Cape Fear subbasin. For purposes of calculating daily IBT amounts in 2008, the
certificate holders estimate that 27.5% of their water use will occur in the Haw subbasin and
that 0.7% of their water use will occur in the Cape Fear subbasin.

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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 is not required until after 2010. However, the calculations
for determining compliance with Condition 1 are shown in Table 3-1. Note that revised
calculations for 2001 result in different values then were included in the 2001 Annual
Report.
Cary, Apex and Morrisville are implementing the Western Wake Regional Water
Reclamation Facility, and Holly Springs is participating in the effluent discharge facilities to
the Cape Fear River below Buckhorn Dam. The project partners have acquired the land for
the wastewater treatment plant site; the Partners have selected and begun working with a
design team for the raw wastewater conveyance facilities, treatment facility, effluent pump
station, effluent transmission main and effluent discharge structure on the Cape Fear River.
Land and easement acquisition activities are continuing for the other parts of the system,
including the pipelines from pump stations to the plant site and from the plant site to the
Cape Fear River discharge point. The Partners’ are working with the U.S. Army Corps of
Engineers on an Environmental Impact Statement which will also meet the environmental
documentation needs for the State Environmental Policy Act. More information about the
status of the project can be found at the Western Wake Partners’ website at
http://www.westernwakepartners.org.
The Town of Cary entered into an agreement with Durham County to pump wastewater to
the Triangle Wastewater Treatment Plant beginning April 19, 2005. When the Western Wake
County Regional Water Reclamation Facility is completed, flow will be rerouted there.

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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 6.8 1.64 9.8 20% 1.4 0.0 0.0
2002 13.5 1.64 9.8 20% 2.7 1.0 0.0
2003 13.4 1.64 9.8 20% 2.7 1.0 0.0
2004 14.2 1.64 9.8 20% 2.8 1.6 0.0
2005 14.5 1.64 9.8 20% 2.9 1.9 0.3
2006 14.3 1.64 9.8 20% 2.9 1.7 0.5
2007 15.9 1.64 9.8 20% 3.2 3.0 0.8
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 was not a limitation on Jordan Lake withdrawals for any of the allocation holders in
2007.
Condition 3 (Disagreggation 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 2007.

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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. The Towns of Cary
and Apex have also entered into an agreement to allow Chatham County access to 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. In May of 2007 the Town of Cary updated its Water Shortage
Response Plan; a copy of this plan is attached.

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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.

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Appendix A:
Daily Tracking of Combined Jordan Lake Water Supply
Allocations for 2007

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Appendix B
Daily Interbasin Transfer Estimates for 2007

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Appendix C:
Town of Cay Water Shortage Response Plan Updated for 2007