DESCRIPTION
This design project will advance the conceptual designs for restoration of two fish passage barrier culverts near the intersection of High School Road and Fletcher Bay Road on Bainbridge Island. The design will include removal of the two culverts and enhancement of 550 linear feet of riparian conditions along the stream between the two road crossings. Stormwater mitigation via Compost Amended Vegetative Filter Strips or similar will be analyzed with the goal of improving runoff quality. This project complements the progress that is being made on fish barrier restorations lower in the watershed, including one city project and two privately led projects.
This project will correct a partial barrier to fish passage (due to water depth). At the moment there are three partial fish passage barrier culverts downstream of this location but progress is being made on all of these projects by varying proponents. Soon this project will become the most downstream barrier to fish at multiple life stages on the main stem of Springbrook creek. Upstream of this project site there exists 0.63 miles of accessible, high quality rearing habitat with intact riparian conditions. Through local monitoring the city has observed that the instream, aquatic habitat experiences consistent, cool, oxygenated stream flow offering important refugia habitat for juvenile salmon.
NOTES
Most of the work will occur within the City ROW. Also, the adjoining landowner (Williamson) has shown interest in restoring the creek and riparian buffer.
