KSN is providing the civil engineering site and pipeline design services, 3D scanning, surveying and mapping for the Silicon Valley Clean Water (SVCW) Regional Environmental Sewer Conveyance Upgrade (RESCU) Program’s estimated $53 million Pump Stations Improvement (PSI) project. This progressive design-build project includes rehabilitation of four wastewater pump stations and 4,800 linear feet of force main rehabilitation, including the Belmont Gravity Pipeline (BGP). The civil site improvements for the Redwood City, Menlo Park, and Belmont Pump Stations included demolition, on-site and off-site grading, drainage, access roads, parking, bypass and force main piping, and perimeter security fence.
The active BGP force main pipeline was replaced with a 36 inch diameter centrifugally cast fiberglass reinforced polymer mortar pipe suitable for construction via tunneling methods. The BGP will convey future peak wet weather flows over 16 MGD, and its design eliminates the need for an existing pump station in poor repair. KSN’s design included relocation of six separate existing water and sewer utility pipelines at tunneling shaft locations, including some sites requiring both temporary and permanent relocation designs. KSN also prepared traffic control plans spanning three separate municipalities to address nine separate road closure scenarios, while maintaining access to businesses within the project limits throughout construction, including a customized traffic control plan and a temporary turnaround for truck access to address a specific property’s operational needs during construction.