South San Francisco Pump Station No. 3
Client: Wilsey & Ham
Location: San Francisco
South San Francisco Pump Station No. 3 pumps raw wastewater from an industrial area off East Grand Ave. It is a large, multi-level facility with conventional non-clog wastewater pumps. The City wished to replace the existing pumps with dry pit submersible style pumps and motors, provide 480 volt electrical service, upgrade electrical equipment, add a standby generator, bring the station up to code and repair a retaining wall.
As part of its Basis of Design, Schaaf & Wheeler found that some pump station components did not require replacement, while additional work was needed above and beyond the requested items to comply with current safety codes, particularly NFPA 820 for confined space.
Morgan Hill Trunk Sewer #2
Client: City of Morgan Hill
Location: Morgan Hill, CA
Schaaf & Wheeler designed and engineered Phase One of the Trunk Sewer #2 project along Monterey Road from Tenant Avenue to California Avenue in Morgan Hill. The project provided an existing 21-inch diameter sewer with redundant capacity while allowing for planned growth in the service area.
The project involved nearly 12,000 lineal feet of 30-inch diameter sewer pipe laid along a major thoroughfare (formerly Highway 101) and alternated PVC pipe with HDPE. The alignment crossed Llagas Creek in a 300-foot-long, three-barrel siphon installed with horizontal directional drilling (HDD). The siphon barrels consisted of 12-inch and 14-inch HDPE pipe. Some 50 feet of pipeline was inserted under a railroad using bore and jack. The sewer is buried 22 feet deep in places and ties into existing parallel sewers at four locations. In addition to planning, engineering and design, Schaaf & Wheeler’s responsibilities included the preparation of specifications, traffic control plans, bid support and construction support.
