The BRA plans to present this Water Management Plan to the Possum Kingdom Lake Stakeholders at 5:30 pm on Tuesday, August 7, 2012. All business owners, homeowners and interested parties are encouraged to attend.

1. Brazos River Authority
Brazos R iver Au th ority
System Operation Permit
and
Water Management Plan
Presented at:
Bryan, Texas Temple, Texas
Tuesday, June 5, 2012 Wednesday, June 6, 2012
3:00 p.m. 5:30 p.m.
Brazos Center Mayborn Convention Center
3232 Briarcrest Drive 3303 N. 3rd Street
Granbury, Texas
Thursday, June 7, 2012
5:30 p.m.
Granbury Resort Conference Center
621 E. Pearl Street

2. Brazos River Authority
Overview
Brazos R iver Au th ority
MISSION
To develop, manage, and protect
the water resources of the Brazos
River basin.
 Oldest river authority in TX
 Created by the Texas
Legislature in 1929
 First entity of its kind
in the nation
 Territory:
– Extends from the Texas-New
Mexico border west of
Lubbock to the Gulf of Mexico
near Freeport
– 42,000 square-miles
– All or part of 76 counties
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3. Brazos R iver Au th ority
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4. Brazos R iver Au th ority
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5. Brazos R iver Au th ority
Permitted Diversion
Amounts (af/yr)
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6. Total Authorized Diversions in Brazos Basin
(acre-feet per year)
Brazos R iver Au th ority
• *730,596 acre-feet per year = (661,901 for System reservoirs +
29,895 for BRA 30 percent share of Allens Creek + 38,800 for old
BEPC water right that BRA purchased below Lake Belton)
• BRA percentage of total authorized diversions – about 32 percent
• During normal year, ~ 6,000,000 acre-feet flows out of the Brazos
into the Gulf of Mexico
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7. Brazos R iver Au th ority
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8. Brazos R iver Au th ority
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9. Brazos R iver Au th ority
System Operation &
Water Management Plan
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10. Excerpt from 1960’s Water Right
Permit Application for Lakes Belton,
Brazos R iver Au th ority
Proctor, Stillhouse Hollow, and
Somerville
Page 10

11. What will the System Operation
Permit Authorize?
Brazos R iver Au th ority
• Use of water from BRA’s existing reservoirs in
conjunction with downstream river flows and
wastewater return flows
• Recognition of availability of return flows as a
source of water supply
• Implementation of an environmental flow regime
consistent with the expectations of State law and
current and pending TCEQ rules
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12. Where Does the Additional
Water Come From?
Brazos R iver Au th ority
• Natural flows downstream of the reservoirs (only
when environmental flow requirements and senior
water rights are met)
• Existing reservoir supplies that exceed current
permit limits (primarily Possum Kingdom)
• Return flows from wastewater treatment plant
discharges
• System efficiency (not all reservoirs will experience
drought of record conditions at the same time)
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13. Why the System Operation Permit?
Brazos R iver Au th ority
• Economical water supply source
• Recommended water supply strategy in Brazos
G and Region H Water Plans
• Commits water to Texas Water Trust
• First major water right permit containing
environmental flow provisions similar to SB3
• Generates revenue to help pay for future water
supply projects
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14. System Operation Permit
Current Status
Brazos R iver Au th ority
• TCEQ Commission ruling (January 25, 2012)
• Remand to SOAH for proceedings on Water
Management Plan (WMP)
• Schedule (24 months):
• BRA - 10 months to file WMP with TCEQ (no
extensions)
• TCEQ - 7 months to review, prepare draft permit
and publish notice
• SOAH - 7 months to hold contested hearing and
prepare PFD for Commission consideration
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15. Water Management Plan (WMP)
Stakeholder Meetings
June
Brazos R iver Au th ority
Bryan : Tues., June 5
Temple : Wed., June 6
Granbury : Thurs., June 7
August
Possum Kingdom : Tues., August 7
Taylor : Wed., August 8
Brenham : Thurs., August 9
October
Glen Rose : Tues., October 16
Round Rock : Wed., October 17
Lake Jackson : Thurs., October 18
November
Water Mgmt. Plan Submitted to TCEQ
Mon., November 26
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16. Water Management Plan
Brazos R iver Au th ority
• Draft System Operation Permit requires WMP
• 20 separate references/requirements
• Must be updated at least every 10 years
• Major elements of WMP
• Document how water is managed and used
• Environmental studies and adaptive
management
• Accounting plan to track water management
and use
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17. Brazos R iver Au th ority Major Categories of the WMP
Source of
Supply and
Water Rights
Water
Resource Water
Planning and Supply
Development Contracting
Environmental
Studies (1)
Water
Accounting Water
and Supply
Reporting Operations
(1) Due to compressed schedule, all Studies will not be completed prior to initial WMP filing date.
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18. Water Use Scenarios
to be Evaluated
Brazos R iver Au th ority
Consistent with State and Regional Water Plans
• Current conditions (2011 water use)
• 2025 projected water use
• With and without expansion of Luminant’s
Comanche Peak facility
• 2060 projected water use
• With and without Luminant expansion
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19. Brazos R iver Au th ority

20. Brazos R iver Au th ority

21. Brazos R iver Au th ority

22. Brazos R iver Au th ority Environmental Flows
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23. Permit Instream Flow at Glen Rose
Overbank
Events
Brazos R iver Au th ority
Qp: 4,945 cfs Qp: 5,265 cfs Qp: 4,370 cfs Qp: 3,525 cfs
Frequency 1 per season Frequency 2 per season Frequency 1 per season Frequency 1 per season
Volume is 31,220.8 AF Volume is 36,144.8 AF Volume is 33,064.5 AF Volume is 28,682.0 AF
Duration is 13 days Duration is 10 days Duration is 11 days Duration is 11 days
High Flow
Qp: 1,120 cfs Qp: 2,070 cfs Qp: 1,320 cfs Qp: 1,040 cfs
Pulses Frequency 2 per season Frequency 2 per season Frequency 2 per season Frequency 1 per season
Volume is 7,325.0 AF Volume is 14,915.7 AF Volume is 7,265.5 AF Volume is 7,565.0 AF
Duration is 7 days Duration is 6 days Duration is 6 days Duration is 7 days
Qp: 403 cfs Qp: 466 cfs Qp: 394 cfs Qp: 347 cfs
Frequency 2 per season Frequency 3 per season Frequency 2 per season Frequency 2 per season
Volume is 2,329.6 AF Volume is 3,208.3 AF Volume is 2,617.2 AF Volume is 2,211.6 AF
Duration is 6 days Duration is 4 days Duration is 6 days Duration is 4 days
234.0 292.8 249.5 332.0
Base Flows
92.0 138.0 101.5 150.0
(cfs)
39.0 45.0 33.3 62.0
Subsistence
15.3 15.3 15.3 15.3
Flows (cfs)
Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov
Winter Spring Summer Fall
Wet (75th %ile) Pulse volumes are in units of acre-feet and durations are in days.
Hydrologic Levels Average (50th %ile)
Dry (25th %ile) Pulse events are terminated when the volume and duration criteria are met.
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24. Brazos R iver Au th ority Environmental Studies
• Adaptive Management
• Collect Additional Data for Environmental Flow
Assessment
• Evaluate the Flow Values in the Permit
• Bring Information Forward to Assess and Refine
the Flow Criteria
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25. Accounting Plan
• Tracks water use under
Brazos R iver Au th ority
permits
• Basin divided into
segments
• Reservoir accounting
Customer water diversions
Water releases
Inflow
Evaporation
• Downstream accounting
Reservoir releases
Return flow discharges
Run of river flow
Customer water diversions
Travel time and losses
• Accounting for
environmental flow
requirements
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26. Timeline of Future Events
• Additional stakeholder meetings in Aug. and Oct.
Brazos R iver Au th ority
• WMP filed with TCEQ staff Nov. 26, 2012
• TCEQ Review Complete,
Notice Published June 26, 2013 (est.)
• TCEQ Public Meeting July, 2013 (est.)
• SOAH Preliminary Hearing Aug. 15, 2013 (est.)
• SOAH Contested Hearing Nov. 15, 2013 (est.)
• SOAH Proposal for Decision Jan. 25, 2014 (est.)
• Commission consideration
of PFD April, 2014 (est.)
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27. Water Management Plan (WMP)
Stakeholder Meetings June
Brazos R iver Au th ority
Bryan : Tues., June 5
Temple : Wed., June 6
Granbury : Thurs., June 7
August
Possum Kingdom : Tues., August 7
Taylor : Wed., August 8
Brenham : Thurs., August 9
October
Glen Rose : Tues., October 16
Round Rock : Wed., October 17
Lake Jackson : Thurs., October 18
November
Water Mgmt. Plan Submitted to TCEQ
Mon., November 26

28. Brazos R iver Au th ority Comments?
www.brazos.org
wmp@brazos.org
Water Management Plan Comments Fax: 254-761-3207
Water Management Plan Comments
c/o Brazos River Authority
4600 Cobbs Drive
P.O. Box 7556
Waco, TX 76714
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29. Brazos R iver Au th ority
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30. Brazos R iver Au th ority
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