Winzler & Kelly was an engineering and environmental services firm based in Santa Rosa, CA, with offices in California, Oregon, Washington, Guam, and Saipan.
This project won the 2004 Consulting Engineers and Land Surveyors of California Large Firm Merit Award.
A series of irrigation dams built since 1910 contained crude fish ladders to mitigate migration, that over time became less and less effective.
The project team designed the new facility to include pneumatically operated steel gates and three state-of-the-art high and low-water fish ladders.
In the facility’s first year of operation, over 16,000 salmon passed through the new ladders and 180 steelhead returned to their upstream hatchery beds.