City of Morgan Hill Water System Master Plan 2017

Figure ES.1 displays the planning area showing city limits, the Urban Growth Boundary of the City and the City’s Sphere of Influence Boundary.

ES.4 SYSTEM PERFORMANCE AND DESIGN CRITERIA

This report documents the City’s performance and design criteria that were used for evaluating the domestic water system. The system performance and design criteria are used to establish guidelines for determining future water demands, evaluating existing domestic water facilities, and for sizing future facilities. Table ES.1 documents the system performance and design criteria for the domestic water system. This criterion was used in the capacity evaluation and for sizing recommended improvements. The City’s municipal water system consists of 16 active groundwater wells, a total of 10.5 million gallons in storage, distribution mains, and fire hydrants. The City’s topography is generally flat in the center of the City with increasing slopes on the east and west; based on this topography, the water distribution system is comprised of 20 pressure zones, with 12 storage tanks regulating system operation. The City’s existing domestic water distribution system is shown in Figure ES.2 , which displays the existing system by pipe size. This figure provides a general color coding for the distribution mains, as well as labeling the existing wells and the storage reservoir. The City’s existing average day domestic water demand was documented at 6.4 mgd. Accounting for losses in the system, the average daily production is 7.2 mgd. Table ES.2 documents the future land use categories, and their corresponding domestic water demands. The average day domestic water demands from existing and future developments is estimated at 9.4 mgd, and parallels the 2035 water demand projections documented in the 2015 Urban Water Management Plan. These demands were used in sizing the future infrastructure facilities, including transmission mains, storage reservoirs, and booster stations. Demands were also used for allocating and reserving capacities in the existing or proposed facilities. ES.7 HYDRAULIC MODEL DEVELOPMENT Hydraulic network analysis has become an effectively powerful tool in many aspects of water distribution planning, design, operation, management, emergency response planning, system reliability analysis, fire flow analysis, and water quality evaluations. The City’s hydraulic model was used to evaluate the capacity adequacy of the existing system and to plan its expansion to service anticipated future growth. The City’s previous model was developed using Innovyze’s H2OMAP, which utilizes a GIS interface and uses the effective EPANET hydraulic engine for processing the hydraulic calculations. As part of this master plan, the hydraulic model was ES.6 EXISTING AND FUTURE DOMESTIC WATER DEMANDS ES.5 EXISTING WATER SYSTEM OVERVIEW

June 2017

ES-3

City of Morgan Hill Water System Master Plan