On 136th Pl SW, between Admiralty Way and Manor Way, a pipe culvert under the road was undersized and blocking fish passage. Due to the culvert’s limited hydraulic capacity and being a partial barrier to fish passage, it was replaced in the summer of 2018. A detour was needed to complete this project.
For this project the undersized pipes were replaced with an aluminum structural plate pipe arch with geowrapped slope headwalls. The culvert is 7.3 feet high and 12.3 feet wide and measures 49.5 feet in length.
Work concluded in late August 2018.
136th Pl SW was fully closed during construction and the detour route was signed.