Thurston County News


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Meghan Porter

Bryan Dominique

Friday, August 5, 2022
Travel Impacts on Littlerock Road SW
April Leigh, Thurston County Public Works, Education and Outreach Supervisor, 360-867-2375 or
Drivers are advised to watch for traffic revisions on Littlerock Rd. SW between Rochester and Littlerock in Southwest Thurston County.

A single-lane bypass road and traffic signals have been installed one-third of a mile north of the Sargent Rd. SW intersection. The temporary traffic revisions are necessary to complete a Fish Passage Enhancement project in the area. 

LittlerockConstruction.jpgThe construction site on Littlerock Rd. SW shows the existing road closed and signs directing drivers to an adjacent temporary bypass road.

“Considering the amount of travel that occurs on this stretch of road, we thought it important to ensure drivers are aware of the need to follow temporary traffic signs and expect delays,” said Thurston County Traffic Engineer Matt Unzelman.

The bypass road was installed because contractors have to dig down to the old culvert underneath Littlerock Rd. SW in order to replace it and complete the project.

“If a driver misses the bypass road and attempts to travel through the project site while construction is underway, they could drive into a hole 20-feet in the ground,” added Unzelman.

The traffic revisions are expected to remain in place until work is completed in Fall 2022.

LittlerockCulvert.jpgThe current culvert under Littlerock Rd. SW near the Sargent Rd. SW intersection is 3 feet in diameter. It is being replaced with16-foot wide box culvert that will improve fish passage.

In addition to the culvert replacement, the project includes restoration and realignment of the stream bed. When completed, it will open 1.65 miles of fish habitat upstream. The Littlerock Rd. SW culvert replacement is 1 of 3 projects being completed this year as part of the Fish Passage Enhancement Program.

The primary goal of the program is to increase access to habitat for salmon and other fish by replacing fish blocking culverts on county owned roadways. The Board of County Commissioners directed Public Works to develop the program in 2016 after reviewing the damaging environmental impacts of fish blocking culverts, and the challenges Washington State faced managing and replacing culverts on state roadways.

For more information about the Thurston County Fish Passage Enhancement Program visit the following links:
For a complete list of Thurston County Public Works projects visit the Project Dashboard. You can also find temporary traffic revisions for projects currently in construction on the Travel Impacts Map.

County Commissioners:

Carolina Mejia
District 1

Gary Edwards
District 2

Tye Menser
District 3