Local Information

Emergency rock slope repair work to cause traffic delays on SR 410

Wednesday, May 24, 2017 - 15:07

Harmony Weinberg, communications, 206-440-4475

MOUNT RAINIER – Travelers who plan to use State Route 410 near the northeast entrance of Mount Rainier National Park should prepare for traffic delays starting Tuesday morning, May 30.

Contractor crews working for the Washington State Department of Transportation will perform emergency rock slope repair work on the hillside located about five and a half miles west of the Crystal Mountain Boulevard gate. Both directions of traffic will alternate through a single lane for up to six weeks.

During the first two weeks of work, contractor crews from Pacific Blasting & Demolition Ltd. will remove loose rocks and trees from the hillside. Crews will then spend the next four weeks drilling large bolts to stabilize rocks.

WSDOT has been working in the area since mid-April when a rockslide came down onto the roadway. While crews installed a barrier to prevent further debris from falling, a rock did damage a vehicle in early May. 

WSDOT is seeking emergency funds from the Federal Highway Administration to cover the estimated $800,000 needed for the repairs.

30-minute daytime delays May 30 – June 8

People who visit the park by car or bicycle should prepare to wait for approximately 30 minutes during the first two weeks of work. Traffic will alternate only at the top and the bottom of the hour between 7 a.m. and 5 p.m. Emergency vehicles will have access through as needed.

Temporary traffic signals will alternate travelers through the area overnight and all day on Fridays, Saturdays and Sundays throughout the six weeks of construction. During the overnight hours, delays up to 10 minutes are expected. With heavier weekend traffic, delays could last up to 30 minutes.

Due to the nature of the second phase of work, weekday delays will be approximately five minutes, traffic alternate through the work zone more frequently after June 8.

Stay informed
Before heading out the door, travelers can get the latest construction information by signing up for the Mount Rainier Area State Highway News email updates. Once on the email updates webpage, subscribers should enter an email address, and check the box for Mount Rainier Area State Highway News under the News and Information section of the page.

Get Our Mobile App

  • Our Android and iPhone apps include statewide traffic cameras, travel alerts, mountain pass reports, ferry schedules and alerts, northbound Canadian border wait times and more.