Lake Kokanee landslide, south of Lake Cushman, Mason County
Edge of landslide slide with scarp showing in cliff of glacial till. The scarp is about 1-2 feet across, on north shore of Lake Kokanee.
Photo taken April 9, 2009 by DNR Division of Geology & Earth Resources geologists during site visit.
DNR Division of Geology and Earth Resources (Washington Geological Survey) geologists investigated the landslide for potential catastrophic failure and subsequent seiche wave at request of Washington Military Department, Emergency Management Division (EMD) April 9, 2009. Report of landslide into Kokanee Lake caused safety concern for private homes, boat launch, park and Cushman Dam No. 2.