North Fork Toutle River; Jackson Creek Lake
- Country:
United States
- Subdivision:
Washington, Cowlitz County
- Date of dam:
1980, 5/18
- River or Lake:
North Fork Toutle River; Jackson Creek Lake
- Type of landslide:
Avalanche, debris
- Trigger:
Volcanic eruption
- Landslide volume (cubic meters):
2,800,000,000
- Dam type:
III
- Dam height (meters):
4.5
- Dam length (meters):
975
- Dam width (meters):
180-425
- Lake length (meters):
820
- Lake volume (cubic meters):
2,470,000
- Time to failure (days):
644 (failed 2/20/82)
- Failure mechanism:
Overtopping
- Breach dimensions:
?
- Controls:
Dug spillway
- Dam materials:
Volcanic debris
- References:
R. J. Janda, 1991, U. S. Geological Survey, unpub. data.
- Comments:
On February 20, 1982, North Fork Toutle River flowed into Jackson Lake, and
caused it to overflow and fail. Estimated peak discharge from failure was 477
cubic meters per second.
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