• Project

SR 900 - Tibbetts Creek to Lake Sammamish – fish passage

Project overview

Reconnecting waterways where our roads act as barriers is a priority for the state. In western Washington, that means building hundreds of fish passable structures under state highways to create habitat essential for meeting fish recovery goals. Beginning as early as winter 2024, WSDOT will install a new fish passable structure that will carry Tibbetts Creek under SR 900 north of Squak Mountain State Park.

Project status
$10 Million

What to expect

WSDOT will select a qualified design-build contractor to complete the design of the fish passable structure for Tibbetts Creek under SR 900. Highway closure needs will be determined by the type of structure and the construction method proposed by the contractor.

This project is being combined into a single contract with other fish passage projects on I-90. Because of the multiple locations, we can’t say at this time when the work will occur on SR 900. Work could begin as early as spring 2024. We anticipate work at this location to be between three months and one year, depending on the structure and the construction method.

A map showing the location of the culvert carrying Tibbetts Creek under SR 900 near Squak Mountain.