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August 2017
4-11
City of Morgan Hill
Sewer System Master Plan
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Lift Station I.
This lift station services the area that is north of the intersection of Tarragon
Avenue and Saffron Drive, yet bounded below U.S. State Highway 101. The lift station is
located at 19160 Saffron Drive. The lift station includes a duty pump that is rated at 500
gpm. The pump discharges into a 6-inch force main that heads southeast along Monterey
Road.
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Lift Station W.
This lift station services the area that is along south of La Crosse Drive,
south of La Jolla Drive, north of Watsonville Drive, and north of Calle Enrique. The lift
station is located at 15505 Watsonville Drive. The lift station includes a duty pump that is
rated at 500 gpm. The pump discharges into a 6-inch force main that heads into
Watsonville Drive.
4.5 FLOW DIVERSIONS
The City’s sewer collection system contains diversion structures that are intended to provide
opportunities to route flow away from sewer trunks with capacity limitations to sewer pipelines that
may have excess capacity. The City has two identified flow diversions that are included in the
hydraulic model:
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East Dunne Avenue Diversion
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The East Dunne Avenue diversion is located at the
intersection of Hill Road and East Dunne Avenue. Flows from the foothills in the east near
Anderson Lake flow west to the intersection of East Dunne Avenue and Hill Road, where
City staff have the option to continue flows west down East Dunne Avenue, or to the south
on Hill Road.
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West Main Avenue Diversion.
The West Main Avenue diversion is located at the
intersection of West Main Avenue and Monterey Road. Flow in the Hale-Monterey Trunk
may be diverted at that intersection to the east to the Railroad-Monterey Trunk or continue
south down Monterey Road.
4.6 SOUTH COUNTY REGIONAL WASTEWATER AUTHORTY
WASTEWATER TREATMENT PLANT
The South County Regional Wastewater Authority WWTP is an 8.5 million gallons per day (mgd)
primary, secondary and tertiary treatment facility. The treatment facility is located at the end of
Southside Drive. The original plant was completed in 1990 with a plant expansion occurring in
2007 to provide the plants current capacity and technology. The SCRWA WWTP has a design
capacity of 9 mgd, but is limited to 8 mgd due to the chlorine contact basin capacity and it can
accommodate a design peak dry weather flow of up to 15.1mgd. The plant is currently operating
at an average flow of 6 mgd with low of approximately 3 mgd and a peak of approximately 9 mgd.