As part of WSDOT’s fish passage program, we will build a 26-foot fish-passable structure under SR 527 just south of 164th Street Southeast in Mill Creek. The current 9-foot culvert causes water to flow too fast for fish to continue upstream. The new bridge span will open more than 8 miles of habitat.
What to expect
During the project, SR 527 just south of 164th Street Southeast/Mill Creek Road/Seattle Hill Road will be reduced to one lane in each direction during overnight hours. Building the fish passage structure will also require two weekend-long road closures. The exact dates of overnight lane reductions and weekend closures will be announced closer to construction.
This project will build a fish passage under SR 527 just south of 164th Street Southeast in Mill Creek.