The project seeks to address a significant instream fish passage barrier in upper Green Valley Creek and stabilize the grade through a 600-ft reach, thereby opening up an additional 4,810 ft of high quality rearing habitat for the creek’s critical coho salmon population and preserving the reach’s grade stability and floodplain connectivity.
The project design involves replacement of an undersized failing culvert and concrete debris, along with the abandoned upstream checkdam. A roughened channel through the new culvert and series of boulder weirs will be constructed to ensure fish passage through the reach, while the riparian area will be revegetated with native plants.