presentation outline
Post on 26-Feb-2016
29 Views
Preview:
DESCRIPTION
TRANSCRIPT
MSSC 2011 Annual Salinity Summit
Charles AhrensVice President / Water Resources and Conservation
Challenges in Brackish Groundwater Desalination
Project Development February 17, 2011
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 2
Presentation Outline• Why Brackish Desalination?• Project Location• Project Components• Project Challenges• Next Steps• Lessons Learned• Summary
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 3
Why Brackish Desalination?• Governor’s 2002
Desalination Initiative
• Resource close to San Antonio
• Un-utilized resource
• Diversification
SAWS Brackish Test Site 1
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 4
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
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 5
Project Components• Production / Monitor
Wells
• Reverse Osmosis Treatment Plant
• Pipeline System
• Brine Injection Wells
• Electrical System
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 6
Project Challenges• Groundwater District
Regulation
• State Water Management
• Concentrate Disposal
• Real Estate
• Public Perception
• Funding SAWS Membrane Pilot Test Unit
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 7
Project Challenges
• Groundwater District Regulation
• State Water Management
• Region L Plan
• Groundwater Management Areas
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 8
Project Challenges
• Concentrate Disposal
• SAWS Disposal Options– Surface Water– Deep Well Injection
• Permitting– General Permit
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 9
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
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 10
$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
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 11
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
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 12
Next Steps• Additional Pilot Testing (2011)
• Drill Test Injection Well (2011)
• Engage Program Manager (early 2012)
• Engage Construction Manager at Risk (late 2012)
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 13
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
February 17, 2011
Challenges in Brackish Groundwater Desalination Project Development
Page 14
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
MSSC 2011 Annual Salinity Summit
Charles AhrensVice President / Water Resources and Conservation
Challenges in Brackish Groundwater Desalination
Project Development February 17, 2011
top related