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Documented Historical Landslide Dams
Coldwater Creek; Coldwater Lake
Mount St. Helens, Washington


-- John E. Costa and Robert L. Schuster, 1991,
Documented Historical Landslide Dams from Around the World: U.S. Geological Survey Open-File Report 91-239, 486p.

Coldwater Creek; Coldwater Lake

  • Country: United States
  • Subdivision: Washington, Cowlitz County
  • Date of dam: 1980, 5/18
  • River or Lake: Coldwater Creek; Coldwater Lake
  • Type of landslide: Avalanche, debris
  • Trigger: Volcanic eruption
  • Landslide volume (cubic meters): 2,800,000,000
  • Dam type: III
  • Dam height (meters): 71
  • Dam length (meters): ?
  • Dam width (meters): ?
  • Lake length (meters): 3,500
  • Lake volume (cubic meters): 83,000,000
  • Time to failure (days): Did not fail
  • Failure mechanism: -
  • Breach dimensions: -
  • Controls: Spillway constructed
  • Dam materials: Volcanic debris
  • References: Meyer and others, 1986
  • Comments: Has not failed.


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10/01/01, Lyn Topinka