ASCE National Engineers Conference - Water Authority

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Presentation at the ASCE National Engineers Conference on Feb. 19, 2010 by Frank Belock, Deputy General Manager. A review of the water supply situation in San Diego County and current construction projects including San Vicente Dam Raise.

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ASCE National Engineers Conference - Water Authority

  1. 1. Frank Belock, Deputy General Manager San Diego County Water Authority 1
  2. 2. Water Authority Background Wholesale water agency g y created by State Legislature in 1944 24 member agencies membe 36-member board of directors Se es 3.2 Serves 3 million peop e a d o people and region’s $174 billion economy Service area 920,000 acres 97% of county’s population 2
  3. 3. Water Authority.. The early years y yy 1946 Last year local water supply was able to support San Diego county’s population and economy County population: 552,804 91% increase from 1940
  4. 4. 4
  5. 5. San Diego County’s Typical Water Sources LAKE SHASTA San Diego County LAKE imports more than 80% OROVILLE of its water supply State Water Project (Bay-Delta) 28% Colorado River 54% Local Water Supply Projects 18% 5
  6. 6. Annual Precipitation San Diego County 6
  7. 7. Future Diversification Goals 1991 2010 2020 5% 10% 2% 6% 11% 2% 4% 10% 2% 9% 8% 7% 95% 6% 9% 29% 21% 62% Metropolitan Water District Seawater Desalination Imperial Irrigation District Transfer Local Surface Water All American & Coachella Canal Lining Recycled Water Conservation Groundwater Dry-Year Water Transfers 7
  8. 8. Challenges to Our Water Supply g pp y Regulatory restrictions g y Fish protections limit State Water Project deliveries Longfin Smelt g Drought Delta Smelt Three straight dry years First 2010 snow survey at 85% of normal Chinook Salmon Low Storage Central Valley Steelhead Green Sturgeon 8
  9. 9. When Can We Move Delta Water? Regulatory Pumping Restrictions JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Salmon S l Delta Smelt Longfin Smelt 9
  10. 10. El Niño Does Not Solve Supply Problem pp y Doesn’t always deliver heavy rain and snow Does not resolve pumping restrictions More water lost during wet years Local rainfall only 5% of y regional supply Map showing El Niño conditions forming in Pacific 10
  11. 11. Climate Change: Water Resource Impacts Decreasing snowpack, earlier snowmelt More rain and runoff, altered water quality Increased demand & evaporation from higher temperatures Saltwater intrusion from sea level rise Threatens Delta supplies 11
  12. 12. Where Are We Today? y Drought Alert in effect through June 30, 2010 8% mandatory savings target Shortage likely into 2011 Monitoring supply conditions 5% initial allocation from State Water Project Shortage level for FY 2011 to be determined this spring 12
  13. 13. Region Succeeding in Saving Water July – December Urban Water Use Acre-feet 350,000 16.9% below b l 2007 12.9% 300,000 below 2008 250,000 200,000 2007 2008 2009 13
  14. 14. 14
  15. 15. Enhancing Colorado River Supplies to San Diego Q QSA Supplies (Colorado River) pp ( ) Imperial Irrigation District transfer (45 to 75 years) Canal-lining projects (110 years) All-American Canal Lining Coachella Canal Lining Canal-lining project C l li i j t Provide 165,000 acre-feet combined in 2010 280,000 acre-feet annually by 2021 Paving train in action Current challenge to the agreement Water continues to flow until resolved 1515
  16. 16. Carlsbad Desalination Project Private 50 mgd local g desalination project being developed by Poseidon Resources Located at the Encina Power Station in Carlsbad Water purchase agreements with nine SDCWA member agencies Work continues on finalizing the configuration of distribution g Aerial view of Encina Power Station system (WA assistance) Projected on-line date: 2012 16 16
  17. 17. Camp Pendleton Seawater Desalination Project Proposed capacity between 50 and 150 mgd Feasibility Study nearing completion Subsurface and open ocean intake options Potential integration with existing Camp Pendleton systems p y Next Steps Planning Agreement with MCBCP Complete Environmental Review Complete Preliminary Design Site map of potential plant locations Earliest On-line Date - 2018 17 17
  18. 18. $3.8 Billion Capital Improvement Program (1989-2030) System of facilities $3.8 Billion $3 8 Billi CIP Meet regional demands Meet emergency demands Support pp Common to both Emergency Demands Dams and reservoirs 34% Pipelines Pi li Support Regional Pump stations and Demands flow control facilities 66% Treatment Plant & Hydroelectric regional assets 18
  19. 19. Twin Oaks Valley Water Treatment Plant First Design-Build- Operate Project for Water Authority W t A th it 100 MGD plant in Twin Oaks Valley Provide water for 100,000 households Enables distribution of treated water in ESP event High quality water Completed 2008 19
  20. 20. Pipeline Relining Reline or replace 82 miles of pipeline Twenty-year program Approx. $787 million 20
  21. 21. 21
  22. 22. Phase 1 Phase 3 Phase 4 Phase 2
  23. 23. Olivenhain Reservoir Completed in 2003 $198 million 24,000 AF of water, enough for 50,000 families a year 23
  24. 24. Lake Hodges Projects Will provide 20,000 AF for emergency use Up to 40 000 40,000 homes Generate enough electricity for 26,000 homes annually Estimated completion late 2010 24
  25. 25. Photo Taken March 2009 25
  26. 26. 26
  27. 27. Reach 6 ‐ San Vicente Portal  Starter Tunnel at San Vicente Reservoir S  T l   S  Vi  R i
  28. 28. Reach 6 ‐ San Vicente Pipeline Rotary Head Tunnel Boring Machine
  29. 29. San Vicente Pump Station 30
  30. 30. San Vicente Surge Tank 31
  31. 31. 32 32
  32. 32. 33
  33. 33. 34
  34. 34. August 2009
  35. 35. October 2009
  36. 36. November 2009
  37. 37. 2010 Water Bond Highlights $11.14 billion Vital for plans to restore Bay-Delta Funding for local supply reliability projects Funding for local g watershed projects Competitive grants for: Drought relief projects Conservation, recycling, desal Water Bond includes $100 million for Environmental protection and San Vicente Dam Raise project restoration Climate change adaptation 38
  38. 38. C a e ges Challenges Will Continue Co t ue Achieving Delta fixes that restore reliability Resolving Quantification gQ Settlement Agreement disputes Mitigating impacts of climate change Creating new water ethic Delta waterways 39
  39. 39. Future Diversification Goals 1991 2010 2020 5% 10% 2% 6% 11% 2% 4% 10% 2% 9% 8% 7% 95% 6% 9% 29% 21% 62% Metropolitan Water District Seawater Desalination Imperial Irrigation District Transfer Local Surface Water All American & Coachella Canal Lining Recycled Water Conservation Groundwater Dry-Year Water Transfers 40
  40. 40. Questions? San Diego County Water Authority Speakers Bureau Requests & Information speakersbureau@sdcwa.org (858) 522-6708 ( ) 41

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