SR 524 - Great Dane Creek - Fish Passage

Project news

  • This project was awarded to Coral Construction Company.
  • Construction is scheduled to begin in summer 2018.
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Contractor crews will replace a box culvert on Great Dane Creek under State Route 524/Maltby Road near Maltby and rebuild the nearby streambed to provide a clearer passage for fish like salmon and steelhead.

Why is WSDOT replacing the culvert under SR 524 at Great Dane Creek?
Great Dane Creek passes through a 4-foot wide culvert under SR 524 just west of State Route 9/Woodinville-Snohomish Road. The narrow passage increases the speed of water through the culvert, creating a partial barrier for fish attempting to swim the creek. The new culvert will measure 19 feet wide, 8 feet tall and 35 feet long.

Four-day full closure
In addition to overnight single-lane closures with alternating traffic, crews will need a four-day full closure of SR 524 at Great Dane Creek to install the new culvert. A detour will be set up on local roads to maintain traffic around the construction area. This stretch of SR 524 carries about 11,000 vehicles a day.

Fish barrier removal program
The Great Dane Creek culvert is one of more than 1,000 culverts subject to a 2013 U.S. District Court ruling that the state must remove culverts that block fish passage under state roads to restore historical tribal fishing rights. 

The End Result
A larger culvert under SR 524 will improve fish passage and habitat in Great Dane Creek. It will also help WSDOT meet a federal court-ordered requirement to remove state-owned culverts that block fish passage.

Needs & benefits

  • Environment: Replacing the culvert and rebuilding the streambed will:
    • Improve fish passage.
    • Create a more inviting habitat for wildlife.
    • Open up an additional 4.5 miles of habitat for salmon and steelhead on Great Dane Creek.
    • Help restore historical fish migration patterns and tribal fishing rights.
    • Allow other wildlife to also safely cross under SR 524.
  • Compliance: The project helps WSDOT comply with the U.S. District Court ruling regarding fish passage.


  • October 2017: Project is scheduled to be advertised for competitive bidding.
  • Summer 2018: Construction is scheduled to begin.
  • Fall 2018: Construction is scheduled to be complete.


Financial Data for PIN 152412D
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $0
CWA $1,932
Total $1,932


Marqise Allen
WSDOT communications

A small map of the fish passage box culvert replacement project on SR 524/Maltby Road at Great Dane Creek near Maltby.

A small photo of the narrow box culvert on Great Dane Creek that is under SR 524 in Maltby.
Great Dane Creek flows through a narrow box culvert under SR 524 near Maltby.
View larger photos