Seems to be the year for rockslides.
Idaho 14 to Elk City was covered by one in the middle of February.  A highway crew was nearby and took a video of the beginning.
http://www.idahostatesman.com/news/state/idaho/article61300727.htmlhttp://www.ktvb.com/news/local/idaho/detour-route-allows-limited-elk-city-access/50988123A limited use detour over a snow covered forest service road was cleared after 5 days.
Washington I5 had one near Portland, though I think that only affected one side.  Washington US2 east of the Columbia River also had a large one that blocked the highway for several weeks.