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MSSC 2011 Annual Salinity Summit
Charles AhrensVice President / Water Resources and Conservation
Challenges in Brackish Groundwater Desalination
Project Development February 17, 2011
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February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
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Presentation Outline• Why Brackish Desalination?• Project Location• Project Components• Project Challenges• Next Steps• Lessons Learned• Summary
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February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
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Why Brackish Desalination?• Governor’s 2002
Desalination Initiative
• Resource close to San Antonio
• Un-utilized resource
• Diversification
SAWS Brackish Test Site 1
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February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
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Project Location• Located on Aquifer Storage
& Recovery property
• 11,800 acre-feet (Phase 1)
• Potential to expand to 25,000 acre-feet
• 45-mile Integration Pipeline will deliver water to south and west, may be built in phases
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February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
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Project Components• Production / Monitor
Wells
• Reverse Osmosis Treatment Plant
• Pipeline System
• Brine Injection Wells
• Electrical System
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February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
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Project Challenges• Groundwater District
Regulation
• State Water Management
• Concentrate Disposal
• Real Estate
• Public Perception
• Funding SAWS Membrane Pilot Test Unit
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February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
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Project Challenges
• Groundwater District Regulation
• State Water Management
• Region L Plan
• Groundwater Management Areas
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February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
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Project Challenges
• Concentrate Disposal
• SAWS Disposal Options– Surface Water– Deep Well Injection
• Permitting– General Permit
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February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
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Project Challenges• Public Perception• Citizen’s Advisory Panel• Project Opposition• Response to Opposition
– Science Committee– Project starts in Bexar
County– Construct Monitor Wells– Continued information to
political leadership in Bexar County and surrounding Counties
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Challenges in Brackish Groundwater Desalination Project Development
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$0
$20,000,000
$40,000,000
$60,000,000
$80,000,000
$100,000,000
$120,000,000
$140,000,000
$160,000,000
2012 2013 2014 2015 2016 2017
Original CIP Revised CIP w/ Revised Costs & Schedule
$143.7M
$51M
$115.1M
$93.4M
$117.6M
$98.5M
$77.9M
$91.1M
$56.5M
$45.8M $45.8M
$56.5M
Project ChallengesFunding – Water Resources CIP Budget
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February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
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Project Challenges• Other Funding Sources
• TWDB Water Infrastructure Funds
– $35 Million – low interest deferred loans for Planning and Design
– $24 Million – low interest loans for Construction
• Federal Funds – Bureau of Reclamation
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February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
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Next Steps• Additional Pilot Testing (2011)
• Drill Test Injection Well (2011)
• Engage Program Manager (early 2012)
• Engage Construction Manager at Risk (late 2012)
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February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
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Lessons Learned• Inform political leadership early (preferably before
feasibility work)
• Never underestimate project opposition
• Start land acquisition early
• Determine water quality early
• Pilot membranes early
• Refine concentrate disposal options early
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February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
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Summary
279,000 AF 222,000 AF
• Project Benefits– Diversification - project relieves pressure on the
Edwards Aquifer– Additional use of
previously purchased System property
– “State-of-the-Art” Treatment
– Phase 1 supplies approximately 5% of SAWS water needs
2020 – Worst Year of DOR
60%
2%4%
7%
5%
22%
Edwards Local Carrizo Western CanyonRegional Carrizo Brackish Desalination ASR
253,000 AF
151,000 AF Edwards102,000 AF Non-Edwards
Note: Excludes Recycle Water
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MSSC 2011 Annual Salinity Summit
Charles AhrensVice President / Water Resources and Conservation
Challenges in Brackish Groundwater Desalination
Project Development February 17, 2011