Richardson Creek Bridge 300 Replacement

December 2020 Update

After carefully weighing two proposed construction options, the county has determined a full road closure is in the best interests of workers and public safety. This option is also more efficient than a staged construction approach, shortening the construction window and lessening the impacts to the environment. Project cost, worker safety, commute times, construction duration, and public input were all important considerations.


Engineering design for the Richardson Creek Bridge replacement is in process. The construction of this project may begin in 2024 pending the acquisition of construction funding and permitting approvals. 


Richardson Creek Bridge 300, located at milepost 0.67 on Woods Creek Road northeast of Monroe, is currently being designed for replacement. 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 proposed replacement bridge will improve mobility for the nearly 6000 daily vehicles and other active users by widening the bridge deck and adding sidewalks and bike lanes. In addition, the new bridge will be lengthened to remove structure supports located within the ordinary high-water mark of Richardson Creek to improve fish passage.

Traffic Impacts

A full road closure during the construction phase requires detouring traffic around the project site. The proposed detour route utilizes Ingraham Road, 132nd St. SE and Wagner Road. This page will be updated with closure dates when they are finalized.  


Present - 2023

  • Design
  • Survey
  • Environmental Review and Permitting
  • Right-of-Way Acquisitions, if applicable

2024 (tentative)

  • Construction  


The total project cost is estimated at approximately $2.6 million. The county is seeking funding sources and a construction date is tentatively set for 2024.

Land Disturbing Activity (LDA) Permit

This project will be reviewed for compliance with Chapter 30.63A (Drainage) and Chapter 30.63B (Land Disturbing Activity) SCC, as well as other applicable regulations in Title 30 SCC. Public Works will exercise its authority under Rule 5001 (Revised 10/2020).

A notice of Land Disturbing Activity (LDA) was published on January 24, 2021. A SEPA checklist has been completed. The 21-day comment period ends February 16, 2021. Comments regarding this project are due on or before 5 p.m. PST on February 16, 2021. Please include your full name and mailing address. Email comments to or mail comments to:

Crilly Ritz, Senior Planner II

Snohomish County Public Works

3000 Rockefeller Ave., M/S 607

Everett, WA 98201

Environmental Review

A SEPA determination will be made later in 2021.

Public Meeting

Snohomish County Public Works held an open house to discuss the Richardson Creek Bridge replacement project and seek input on two construction proposals on October 9, 2019. Information about the project was available along with project experts to answer questions.