URS Corporation hired Stoecker Ecological to review and comment on fish passage weir design at the Cliff Drive road crossing barrier near the mouth of Arroyo Burro. Following an initial survey of the barrier, a low-cost, short-term fish passage design was produced that would establish step pools within the existing concrete and boulder grade control structure and apron. The project was constructed during the summer of 2006 and now provides improved fish migration into the creek.
Cliff Drive Bridge and downstream concrete and boulder grade control fish migration barrier.
The short-term fish passage design included removal of several large boulders from the step pools and cutting a notch into the concrete curb to increase jump pool depth, reduce jump height, and confine lower flows.
The completed Arroyo Burro Estuary Project in 2007 with improved fish passage, removal of a 300-foot culvert, expanded estuary, and re-vegetation with over 5,000 native plants.