City of Morgan Hill Sewer System Master Plan 2017

x Basin 4. This basin includes 9 percent of the total acres and 8 percent of the existing dry weather flows. x Basin 5. This basin includes 8 percent of the total acres and 11 percent of the existing dry weather flows. x Basin 6. This basin includes 20 percent of the total acres and 18 percent of the existing dry weather flows. x Basin 7. This basin includes 4 percent of the total acres and 6 percent of the existing dry weather flows. x Basin 8. This basin includes 4 percent of the total acres and 7 percent of the existing dry weather flows. x Basin 9. This basin includes 12 percent of the total acres and 8 percent of the existing dry weather flows. x Basin 10. This basin includes 5 percent of the total acres and 8 percent of the existing dry weather flows. x Harding Basin. This basin includes 17 percent of the total acres and 12 percent of the existing dry weather flows. 5.3 BUILDOUT WASTEWATER FLOWS The land use methodology was used to estimate the buildout flows from the City’s Planning Area and to be consistent with the General Plan. Table 5.3 documents the total acreages for residential and non-residential land use, and the undeveloped lands designated for urbanization. The undeveloped lands were multiplied by the corresponding unit flow factor to estimate the sewer flows. The 2014 flows were increased to 2.8 mgd to account for 100% occupancy, and the ultimate buildout flows were calculated at 4.2 mgd. 5.4 SEWER COLLECTION SYSTEM DESIGN FLOWS The design flows most relevant in this capacity analysis of the sewer system, in addition to the Maximum Day Dry Weather Flows (MDDWF), include the peak dry weather flow (PDWF) and peak wet weather flow (PWWF). x Peak Dry Weather Flow (PDWF). The PDWF is used for evaluating the capacity adequacy of the sanitary sewer system, and to meet the criteria set forth in the previous chapter and in the City standards.

August 2017

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City of Morgan Hill Sewer System Master Plan