Work to install a fish-friendly culvert on state Route 507 is expected to begin Tuesday outside the Pierce County city of Roy.
Drivers can expect temporary realignments, narrower lanes and shoulders, and reduced speed limits at Lacamas Creek, the state Department of Transportation said.
The work is expected to stretch through the summer. The project is expected to cost $2.2 million.
The new large box-style culvert will replace an outdated and undersized culvert that has impeded fish passage to upstream habitat, according to the department.
Replacing the culvert is part of a larger effort by the agency to correct fish barriers ruled insufficient by a federal court in 2013.
A panel of the 9th U.S. Circuit Court of Appeals ruled on a lawsuit brought by dozens of Indian tribes..
It ordered the state to “correct most of its high-priority barrier culverts within 17 years, and to correct the remainder at the end of their natural life or in the course of road construction project undertaken for independent reasons.”