Cypress Chamber of Commerce John Kennedy Executive Director of Engineering & Water Resources Orange County Water District July 11, 2017
California Imported Water Central Valley Project 1931 State Water Delta Project 1960s 1960s Southern California receives water from imported supplies and locally managed groundwater basins, or aquifers 1913 Orange County 1939 Metropolitan Water District of Southern California
Special District formed in 1933 Manage the Orange County Groundwater Basin Serve 19 water retailers and 2.4 million residents Orange County Water District
OCWD Groundwater Basin
Santa Ana River Watershed Prado Dam Big Bear Lake
1,100 acres of recharge facilities (44km 2 ) ~ 250,000 afy of recharge into groundwater basin (308 million m 3 /year)
MANAGING SANTA ANA RIVER WATER Santa Ana River Burris Basin The T and L levees spread Santa Ana River water and also provide nesting and roosting habitat for numerous types of water fowl.
INFLATABLE RUBBER DAMS
OCWD Recharge Basins
OCWD has a Cooperative Program with the ACOE to Conserve Water Behind Prado Dam. ACOE Flood risk management facility Temporary storage of storm water Average capture and recharge of 50,000 afy Sedimentation will fill conservation pool in 50 yrs.
Desired Seawater Holding Point Seawater Intrusion Injection Wells Production Wells Pacific Ocean Talbert Aquifer Current Extent of Seawater Intrusion
Groundwater Production Has More Than Doubled in last 60 years - Sustainably.
OCWD Groundwater Basin Accumulated Overdraft Target Overdraft 6/30/17 320,000 af Basin Operating Range
What Is The Groundwater Replenishment System (GWRS)? 100 mgd (103,000 afy) advanced water purification facility Takes treated OCSD sewer water that otherwise would be wasted to the ocean and purifies it to near distilled quality Water used for seawater barrier and to recharge the groundwater basin Operational since January 2008 (70 mgd) Expanded in June 2015 (additional 30 mgd)
Agency Responsibilities Sewage Orange County Water District provides local water retailers with a reliable, adequate, high-quality groundwater supply at the lowest reasonable cost in an environmentally responsible manner Orange County Sanitation District protects public health and the environment by providing effective wastewater collection, treatment, and recycling Source Control OCSD OCWD Primary Treatment Secondary Treatment Advanced Water Purification Reuse
GWRS Advanced Water Purification Process OCSD Secondary Effluent Normally Goes to Ocean Evoqua Memcor Microfiltration (MF) Backwash Sent to OCSD Hydranautics Reverse Osmosis (RO) Brine Treated in OCSD Outfall Trojan Ultraviolet Light (UV) with Hydrogen Peroxide Seawater Barrier Recharge Basins in Anaheim
Project Phase GWRS Summary GWRS Max Daily Production (MGD) GWRS Yearly Production (AFY) Capital Cost (millions) GWRS (2008) 70 72,000 $481 GWRS Initial Expansion (2014) GWRS Final Expansion Estimate (2022) 30 31,000 $142 30 31,000 $351 130 mgd 134,000 afy $974
Orange County Sanitation District Wastewater Flows Recycled by Orange County Water District
Huntington Beach Desalination Facility
Project Information OCWD and Poseidon Resources entered into a non-binding Term Sheet in May 2017 Poseidon permit/finance/construct treatment plant OCWD permit/finance/construct necessary distribution facilities Total Cost of Water ~ $1,500 to 2,000/acre-foot 50 mgd - 56,000 acre-feet per year plant Poseidon currently working to permit project
Project Considerations Determine best approach to distribute the water New locally controlled water supply Reduces how much imported water must be purchased Will climate change impact future water supplies? Currently more expensive than imported water How much more willing to pay for increased water security? Will this opportunity ever present itself again in the future?
Current OCWD Service Territory Water Supply Sources Total Water Demands 395,000 afy 23
End of Presentation
QUESTIONS? John Kennedy 714-378-3304 JKennedy@ocwd.com 18700 Ward Street Fountain Valley, CA 92708 www.ocwd.com