City of Morgan Hill Water System Master Plan 2017

landscape irrigation, agricultural irrigation, industrial processes, and potable reuse. As part of the RWFE, infrastructure required to convey recycled water from the South County Regional Wastewater Authority (SCWRA) Wastewater Treatment Plant (WWTP) in the City of Gilroy to the potential users was identified. Based on the results of the RWFE, which included a technical and economic feasibility evaluation, the City elected to not pursue the development of a recycled water system at this time. However, the City is continuing to explore options for the purpose of utilizing recycled water within the City. As opportunities arise, funding sources for implementing a recycled water program should be evaluated. The City’s current water system serves land ranging from approximately 320 feet above sea level to more than 1,100 feet. To adequately provide water in this service area requires the creation of multiple pressure zones that operate with varying pressures between 45 and greater than 100 psi. Figure 4.3 shows the boundaries and names for these pressure zones. The City’s supply, and a majority of the service connections, are located in the Nob Hill and Boys Ranch pressure zones. Several gate valve interconnections between the Nob Hill and Boys Ranch pressure zones exist, which allow water to transfer between the zones; under typical operating conditions these gate valves remain closed. Groundwater is pumped into the City’s distribution system via more than 175 miles of pipeline. As the City’s sole source of supply is groundwater, which is distributed throughout the domestic water system, there are no dedicated transmission systems in the City. The pipelines are generally 24- inches and smaller, and convey water to the consumers’ service connections. An inventory of existing modeled pipes, extracted from the GIS-based hydraulic model and used in this analysis, is included in Table 4.2 . For each pipe diameter, the inventory lists the length in feet, as well as the total length in units of miles. Storage reservoirs are typically incorporated in the water system to provide water supply for operation during periods of high demand, for meeting fire flow requirements, and for other emergencies, as defined in the City’s planning criteria. The City’s existing storage reservoirs are summarized in Table 4.3 , along with their volumes, construction year and type, height, diameter, bottom elevations, and overflow height and elevations. These reservoirs are also shown on the hydraulic profile schematic ( Appendix B ), with the HWL and bottom tank elevations. 4.4 PRESSURE ZONES 4.5 WATER DISTRIBUTION PIPELINES 4.6 STORAGE RESERVOIRS

June 2017

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City of Morgan Hill Water System Master Plan