Beginning July 13 through August 28, King County’s work to replace a failing culvert on Green River Road will require its closure for a seven-week period between the area of Mary Olson Farm and the Auburn Golf Course.

The new, bigger culvert will preserve the roadway and improve fish passage in the area. Local access to Auburn Golf Course will be maintained via northbound Green River Road. Drivers will be able to access Mary Olson Farm and the S 277th Corridor Trail via southbound Green River Road.

Construction dates are subject to change, please check MyCommute for updates on this project.

Why is King County doing this project?

The existing culvert has rusted out and is failing, and needs to be replaced in support of Roads’ drainage asset management program and County Executive Dow Constantine’s Clean Water and Health Habitat agenda. Culverts that are in poor condition or undersized pose a risk of failure that can result in the collapse of roadways, landslides, flooding, damage to public and private property, and associated risks to life safety. When culverts reach the end of their lifecycle, they need to be replaced with new infrastructure designed to current standards in order to mitigate risk and provide appropriate drainage functionality. Culverts that are not designed to be fish passable block access to important upstream habitat necessary for the sustainability of fish species.