Parts of the North Cascades Highway and State Route 410 ( in the southern Cascades) remain closed because of mudslides late last week that blocked the roads. And extensive roadwork on US 2 (Steven Pass highway), near Leavenworth, has closed part of that road through Friday – although a detour is in place.
The slides on the North Cascades and 410 highways followed heavy rains that unleashed torrents of mud and rocks. The state Department of Transportation hopes to reopen the North Cascades Highway at noon on Thursday (Sept. 12); there’s no reopening time yet for SR 410; check here for updates.
The North Cascades Highway, which links Western Washington and the Methow Valley, is now closed from milepost 147 near Granite Creek to milpost 157 at Rainy Pass. Drivers still can access trailheads and communities on both sides of the 10-mile closure. And there are alternate routes to the Methow and the popular little tourist town of Winthrop.
SR 410, which leads to the east side of Mount Rainier National Park and then climbs eastward through the mountains, is closed between milepost 105 to 108, nine miles west of the junction with US12, because of several mudslides which have buried and damaged the roadway, with debris up to 8 feet deep at one point. The closure does not affect access to the east side of Mount Rainier National Park nor to Chinook Pass, a popular hiking and viewpoint area just to the east of the park.
Drivers on US 2, over Stevens Pass, will encounter a long detour until noon this Friday. A section of road just west of Leavenworth is closed to all traffic from the both directions in the Tumwater area (between mileposts 85 and 99).
The DOT has placed barricades at Coles Corner and Leavenworth; traffic is being diverted through Plain on county roads. A bridge is being replaced on US 2.