1. Brazos River AuthorityBrazos 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 OverviewBrazos 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 Page 2

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5. Brazos R iver Au th ority Permitted Diversion Amounts (af/yr) Page 5

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 Page 6

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9. Brazos R iver Au th ority System Operation & Water Management Plan Page 9

10. Excerpt from 1960s 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 BRAs 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 Page 11

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) Page 12

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 Page 13

14. System Operation Permit Current StatusBrazos 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 Page 14

15. Water Management Plan (WMP) Stakeholder Meetings JuneBrazos 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 Page 15

16. Water Management PlanBrazos 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 Page 16

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. Page 17

18. Water Use Scenarios to be EvaluatedBrazos 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 Luminants Comanche Peak facility 2060 projected water use With and without Luminant expansion Page 18

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22. Brazos R iver Au th ority Environmental Flows Page 22

23. Permit Instream Flow at Glen Rose Overbank EventsBrazos 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. Page 23

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 Page 24

25. Accounting Plan Tracks water use underBrazos 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 Page 25

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.) Page 26

27. Water Management Plan (WMP) Stakeholder Meetings JuneBrazos 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 Page 28

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