Item 21 First Amendment to Interagency Agreement with the Orange County Water District and Moulton Niguel Water District

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Public Works Agency www.santa-ana.org/pw Item # 21 City of Santa Ana 20 Civic Center Plaza, Santa Ana, CA 92701 Staff Report May 20, 2025 TOPIC: Agreement Amendment for Interagency Emergency Interconnection Study AGENDA TITLE First Amendment to Interagency Agreement with the Orange County Water District and Moulton Niguel Water District RECOMMENDED ACTION Authorize the City Manager to execute the first amendment to the agreement with Orange County Water District and Moulton Niguel Water District, to extend the term of the agreement to June 30, 2028, and to amend the scope of work to include a final design of the proposed infrastructure based on the preliminary design analysis (Agreement No. A-2025-XXX). GOVERNMENT CODE §84308 APPLIES: No DISCUSSION The Public Works Agency's (PWA) Water Resources Division oversees and maintains the daily operations of the City's water distribution system which serves more than 45,000 customer connections. The water system is comprised of approximately 480 miles of water main, 21 groundwater wells, seven pump stations, 10 reservoirs with a storage capacity of 49 million gallons, four pressure regulating stations, and seven connection points to Metropolitan Water District of Southern California (MET) water supplies. The City pumps approximately 85% of its potable water from the Orange County Groundwater Basin, which is managed by Orange County Water District (OCWD), while the remainder of the City's potable water needs come from imported water sources via seven MET connections located within the City. As a result of the City's investment in water supply capacity, the City's 2017 Water Master Plan identified that the City's water system has adequate capacity to supply the City's maximum daily demands for existing, near -term, and buildout scenarios using only groundwater wells.