KELSO - A project that aims to make State Route 4 near the Cowlitz/Wahkiakum county line safer from falling rocks began on Monday, July 7, according to the Washington State Department of Transportation. Scheduled 45-minute closures during the daytime also began on that day.

For approximately three weeks, SR 4, in the vicinity of milepost 46, will be open between 5 p.m. and 8:15 a.m. Then, after 8:15 a.m., SR 4 will close in both directions for 45 minutes, reopening every hour, on the hour, for 15 minutes, until 5 p.m.

Due to the sensitive nature of this type of construction, dry weather is necessary to safely execute the work. In the event of unfavorable weather, the full closures will likely be suspended, allowing traffic to pass.

These long closures are necessary so that the contractor can safely remove loose rock and secure the rock face adjacent to the roadway. Once this critical phase of the project is completed, the contractor will shift traffic control to intermittent one-way lane closures with flaggers. During this time, crews will install the rock anchors and cable fencing and that will catch loose rock in the future. At that time, drivers should expect up to 20-minute delays for the remainder of the project. The project is expected to finish in early fall.

This rock stabilization project will yield safety improvements to the SR 4 corridor between mileposts 45.92 and 45.95, just east of County Line Park.

WSDOT held a public open house in February to announce the road closures necessary road closures associated with this project.

For weekly updates on this and all other state traffic impacts in the region, please visit the WSDOT Southwest Region Weekly Travel Advisory Web page: (

For more information about the SR 4 East of County Line Rockfall Project, and to see exact closure times, please contact WSDOT's Kelso Area Engineering Office by phone at 360-442-1341; by e-mail at (; or visit the project Web page at (

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