Mid-Peninsula Station Tanks 119 and 120

This project included the installation of two new water storage tanks located within a residential neighborhood in the hills of San Carlos, California. The 400,000 gallon tanks were completed in parallel and were similar in design to a DN tank without the post-tensioning element. Project components included grading, earthwork, retaining walls, fencing, asphalt pavement, drainage improvements, piping, fittings, tank, footings, valves, and appurtenances. New ductile iron piping were installed to connect to the distribution system utilizing EBAA Flex-Tend Flexible Expansion joints that were designed to protect water pipeline systems from the stresses produced by ground motion and specifically allows for differential movement during seismic events.

Both sites had significant constraints for construction work and laydown areas. The Station 119 site design included a retaining wall along the hillside at the back of the property to create an access area for the contractor’s equipment during the construction of the new tank. The project required monitoring of mitigation measures established in the IS/MND document and the coordination of special inspections.

CLIENT

California Water Service

VALUE

$2 Million