SR 9 - Unnamed Tributary to Landingstrip Creek - Fish Passage

Project news

  • This project was awarded to Barcott Construction, LLC, from Chehalis, WA in December 2020.
  • Travelers can sign up for email updates on this and other Whatcom County highway projects.
  • Construction will begin July 19, 2021. 
  • The full 96-hour closure with detour will begin on July, 26, 2021.

Needs & benefits

This project will improve the passage of migratory fish by replacing the culvert underneath SR 9 at milepost 70.60, where an unnamed tributary runs to Landingstrip Creek in Whatcom County. The existing culvert has a diameter of 30 inches and is not passable by fish because it exceeds the stream drop criteria. The new culvert will be a 14-foot by 10-foot split box culvert and will open up 1.34 miles of upstream fish habitat. There will be no change to the alignment of SR 9. A portion of the upstream tributary will be slightly realigned in order to straighten out the channel.

Fish barrier correction is a priority
Highways cross streams and rivers in thousands of places in Washington State, which can impede fish migration. For nearly three decades, WSDOT has worked to improve fish passage and will continue to pursue projects that reconnect streams and help keep our waterways healthy.

What travelers can expect
WSDOT will work closely with the contractor to minimize the inconvenience to neighbors and travelers. Drivers can expect intermittent shoulder and single lane closures of SR 9 with flaggers directing traffic through the work zone.

A continuous 96-hour, full closure of SR 9 is anticipated to occur sometime in late July during a single workweek, Monday through Thursday. This will allow crews to excavate the existing roadway, remove the existing culvert, install the new culvert and rebuild the roadway.

This closure requires a proposed 68-mile detour that will utilize:

  • SR 9 (MP 55.9 –84.0)
  • SR 20 (MP 59.3 - 66.1)
  • I-5 (MP 230.0 – 254.8)  
  • SR 542 (MP 0 – 14.6)

Advanced warning signs will be placed 14 days prior to the full roadway closure. By the end of the full closure, at least one lane of SR 9 will be reopened.


  • December 2020: Bid awarded to contractor.
  • June 2021: Tentative construction start date.
  • July 19, 2021: Start work in the existing channel.
  • July 26, 2021: Full 96-hour closure with detour begins.
  • July 30, 2021: Full 96-hour closure with detour ends. 


State funds will be used for this project.


RB McKeon

Melissa Ambler
Project Engineer

State Route 9, Unnamed Tributary to Landingstrip Creek - Fish Passage

Map of State Route 9, Unnamed Tributary to Landingstrip Creek - Fish Passage