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August 2017
5-8
City of Morgan Hill
Sewer System Master Plan
x
Peak Wet Weather Flow (PWWF).
The PWWF is used for designing the capacity of the
collection system, while allowing acceptable amounts of surcharging in the system.
The design flows used in evaluating the capacity adequacy of the sewer collection system are
summarized on
Table 5.4
. The table lists the maximum day and peak hour flows for dry and wet
weather conditions. PDWF and PWWF used for evaluating the existing collection system were
estimated at 5.4 mgd and 7.7 mgd, respectively. The PDWF and PWWF used for designing the
General Plan buildout system, including growth, were estimated at 8.0 mgd and 10.5 mgd,
respectively.