Richardson Creek Bridge 300 Replacement


Richardson Creek Bridge is located at milepost 0.67 Woods Creek Road northeast of Monroe. The existing short span bridge was built in 1961 and does not support the current traffic needs of the area. The current bridge is 18 feet long and 22 feet wide, with precast concrete girders, and supported on timber piles.


The replacement bridge will improve mobility for the nearly 6000 daily vehicles using this arterial road by widening the bridge deck. The proposed new bridge will be lengthened to remove structure supports from the flood waters of Richardson Creek. The new design will also include added sidewalks and bike lanes for non-motorized transportation.

Engineering and design for the Richardson Creek Bridge replacement is estimated to begin in 2019.

Traffic Impacts

The construction of this project is estimated to begin in 2021. To install the new bridge, a full road closure of Woods Creek Road at the bridge location is proposed.  If the road closure is approved, a detour route will be provided utilizing Ingraham Road, 132nd St. SE, and Wagner Road.


Funding has been secured for the replacement bridge. It includes 85% federal funding from the Surface Transportation Program (STP) and 15% from the Snohomish County Roads Fund. The total project cost is estimated at approximately $2.1 million.