Debris Flow — East Slopes Northern Cascades, Washington

2008-05-18 · East Slopes Northern Cascades, Washington

Wider weather episode

A large landslide sent a 100 foot wide swath of rock and mud down the north face of the Icicle Valley about 15 miles west of Leavenworth. This caused a temporary diversion of Doctor Creek, with boulders, trees, and mud spilling into Icicle Creek. Icicle Road was severely damaged and closed as a result at Ida Creek Campground. The creek was already swollen to near flood stage by unseasonably warm temperatures and snow melt. The estimated cost to build a new road where the slide occurred is one million dollars. A bridge was also damaged by the slide with an estimated damage amount of $40K.

Source: NOAA Storm Events Database, event_id 103316. Narrative written by the NWS forecast office that issued the report.