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South Orange Coastal Ocean Desalination (SOCOD) Project Dana Point/Doheny Beach, California

South Orange Coastal Ocean Desalination (SOCOD) Project Dana Point/Doheny Beach, California. November 2010 Status. Where Southern California Gets Its Water 50% Import - 50% Local. Transfers & Storage. Local Supplies LA Aqueduct (1913). State Water Project Entitlement (1972).

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South Orange Coastal Ocean Desalination (SOCOD) Project Dana Point/Doheny Beach, California

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  1. South Orange Coastal Ocean Desalination (SOCOD) ProjectDana Point/Doheny Beach, California November 2010 Status

  2. Where Southern CaliforniaGets Its Water 50% Import - 50% Local Transfers & Storage Local Supplies LA Aqueduct (1913) State Water Project Entitlement (1972) Colorado River Aqueduct (1941) Local Supplies Groundwater & Recycling Conservation 2

  3. MWDOC Member Agencies 14 cities 11 water districts 1 private water company 1 community service district Orange County Water District Total = 28 water Population = 2.3 million

  4. Orange County Water Sources 46% Local Source 2009-10 AF % Natural Flows Rivers/Streams 133,000 21 Indirect Recycled (Santa Ana River) 86,000 13 GWRS Purified Water 66,000 10 Draw on OCWD Groundwater Storage (23,000) -4 (added storage) Recycled–Direct (landscape irrig.) 37,000 6 Imported for Replenishment 26,000 4 Imported for Direct Use 254,000 40 Consumptive Use 579,000 90 Water Use Efficiency Programs 65,000 10 Total without WUE 644,000 100%

  5. Diemer Filtration Plant Regional Imported Water System to South Orange County • Water from the Joint Regional Water Supply System (JRWSS) • Water from the Water Importation Pipeline and South County Pipeline

  6. Major Water Supply Issues in California Regulatory-imposed pumping restrictions have reduced State Water Project pumping by up to 50%; drought conditions have occurred; water allocations began July 1, 2009 Long-term resolution of Bay-Delta fix is uncertain at this time, but many years away Water recycling, development of other sources and water conservation are ALL NEEDED to close the supply gap Ocean desalination is one new source that needs to be developed in California and along other coastal States of the U.S.

  7. South Orange Coastal Ocean Desalination Project Concept Project Layout

  8. South Orange Coastal Ocean Desalination Project 4 1 3 5 2 • 15 million gallons per day meets about 25% of the 2025 water demands for: 1. Laguna Beach 2. San Clemente 3. San Juan Capistrano 4. Moulton Niguel WD 5. South Coast WD • All five agencies can physically receive the water into their systems

  9. SOCOD Participants Total Water Sources(acre-feet per year)

  10. South Orange Coastal Ocean Desalination Project NOT connected to a Coastal Power Plant Utilizes slant well intake system to be protective of the ocean environment Utilizes an EXISTING ocean outfall for brine discharge; makes discharge closer in salinity to that of the natural ocean water to improve mixing Could be on-line in 2016

  11. South Orange Coastal Ocean Desalination Project Construction of a 15 million gallon per day Ocean Desalination Plant using a slant well subsurface intake to produce about 16,000 acre-feet per year of high quality drinking water is FEASIBLE Project cost = $136 million (Boyle Engineering, 2007) to $152 million with an allowance for San Juan Basin mitigation Cost of water = $1287 per acre foot (Boyle Engineering, 2007) to $1356 per acre foot with mitigation. MWDOC has an executed contract from MET to provide $250 per AF towards the cost of the water

  12. Test Slant Well Schematic Drill Rig Ocean Surface Land Surface 23o 350 feet± Ocean Bottom Main Aquifer 40 to 130 feet ± Infiltration Fresh Water Salt Water Test Slant Well 325 feet

  13. Drilling Site at Doheny Beach

  14. Dual Rotary Drill Rig

  15. Welding Screen Joints

  16. Objectives for Three Year Extended Pumping and Pilot Studies • Start-up pumping of existing well in June 2010 to conduct study work • Extended pumping to pull in ocean water – 9 months • Validate groundwater model and beach wellfield capacity • Address upstream groundwater impacts • Assess water quality and microbial fouling • Confirm alluvial aquifer pretreatment capability • Evaluate water quality and post-treatment options • Conduct pilot plant study; develop process treatment specifications • Conduct materials corrosion tests • Refine Project cost estimates

  17. Unloading Test Facility

  18. Mobile Test Facility – Transformer and Panel

  19. Intuitech Technician Working on RO Unit

  20. Corrosion and Microbial Flow Test Apparatus

  21. Intuitech – Electrical Control Unit

  22. Slant Well Increase in Salinity (June through Oct 2010)

  23. Questions? Thank you!

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