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TTT 2.7.1 Water A. Existing Facilities Water for the Specific Plan area is provided by the City of Santa Ana. The City owns and maintains an extensive network of water infrastructure, including 444 miles of transmission and distribution mains, nine reservoirs with a storage capacity of 49.3 million gallons, seven pumping stations, 20 wells, and seven import water connections. The City receives its water from two main sources: local well water from the Lower Santa Ana River Groundwater Basin, also known as the Orange County Groundwater Basin (OC Basin), which is managed by Orange County Water District (OCWD), and imported water from the Metropolitan Water District of Southern California (Metropolitan). The City is a member agency of Metropolitan. Metropolitan, as a regional wholesaler, supplies imported water to Southern California. Metropolitan's primary purpose is to develop, store and distribute water at wholesale rates to its member public agencies for domestic and municipal uses. The City owns and maintains a significant amount of water infrastructure surrounding and within the Specific Plan area. The Specific Plan area lies at the extreme north end of the City's water system. The existing mall has private water infrastructure that connects to the City water main in the ring road, Main Place Drive. There are four separate fire service connections to the City main in Main Place Drive. Fire services to multiple buildings and locations are bundled on the downstream side of each double detector check valve. The only fire pump on -site is located at parking structure number 4, the structure constructed by the City in 1978. DEVELOPMENT PLAN 1 2 The City's main source of water supply is groundwater from the OC Basin. Imported water and recycled water make up the rest of the City's water supply portfolio. Recycled water is primarily utilized for parks, medians, and trails, but is not available in the Specific Plan area. A Water Supply Assessment (WSA) was prepared for the Specific Plan land use program in January 2019. The WSA summarized the anticipated water demands and identified supplies set forth in the City's 2015 Urban Water Management Plan (UWMP) for the 25-year period starting in 2015 and ending in 2040. Based on the analysis in the WSA, the City's UWMP slightly underestimates the overall water demand in 2020, once the Project is accounted for, but the Project water demand in 2025, 2030, 2035, and 2040 does not push the city's overall anticipated water demand past the City's demand estimate outlined in the UWMP. The WSA concluded that the Project can be reliably supplied by the City water system. C. Proposed Water Svster The majority of the existing water system will remain in place; however, some water infrastructure will be relocated to accommodate the proposed development program. Existing public Main Place Drive between Main Street and Bedford Road will be vacated and realigned, and the existing water lines will be abandoned and relocated within the new private drive. Existing water lines will be removed and realigned on both the east and west frontages of the mall building. Figure 2-12, Water Plan, shows the existing and proposed water system. The proposed water system is schematic and may change based on final engineering and building placement. MAINPLACE SPECIFIC PLAN 1 2-21