For City of Pacifica
Pacifica, California

Questa  recently completed a creek restoration and channel bank stabilization plan for a 1,600-foot reach of San Pedro Creek in Pacifica, California. Project components included hydraulic analyses, design of habitat enhancement features and creek restoration, and construction oversight. The primary goal of the project was to remove a fish migration barrier at the Capistrano Avenue Bridge. Channel degradation perched the bridge and a historic Denil fish ladder, preventing salmonid migration. Fill was placed in the degrading channel to raise the invert to the historic base of the bridge. The fill was stabilized by a series of 19 rock and log grade-control structures.  Rock and over 400 tons of woody debris were added to the system to create salmonid and other diverse aquatic habitat. The hydraulic dimensions of the channel were determined through extensive geomorphic analysis. A new streambed was created utilizing imported rock and gravel material.

Under Questa's direct supervision the project was completed in just over two months and within budget.