Department of Natural Resources estimates that the landslide volume is approximately 4 million cubic yards and covers an area of about 20 acres.
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Department of Natural Resources estimates that the landslide volume is approximately 4 million cubic yards and covers an area of about 20 acres.
Credit: Washington State Department of Natural Resources

Best and worst case scenarios for the Rattlesnake Ridge landslide

Bill Radke talks to David Montgomery, professor of geology at the University of Washington, about the crack in Rattlesnake Ridge and what geologist and state officials are looking for as they monitor the slow moving slide.