Power > Projects >

SBSA Outfall Replacement


Redwood City, CA


This project involved replacing a segment of an existing concrete outfall with a 66-inch polyethylene pipe. The replacement section runs through bay wetlands and was replaced while the force-main remained active. Work consisted of constructing a 17-foot by 235-foot steel sheet pile cofferdam with bracing, in bay mud, over the existing outfall. The cofferdam was constructed with 50 to 55 foot AZ18sheets. Later phases of the project included excavation, removal of the existing RCP pipe, and installation of a new polyethylene pipe using divers, backfilling and removal of the cofferdam.


Power’s design ideas, input, and their pre-bid comparison cost estimate was invaluable in assuring that this complicated work would result in a buildable, as well as safely and environmentally constructed, project.”

Joe Covello, Principal
The Covello Group