Diablo

Whatcom County, Washington (near Newhalem/Diablo)

River/Stream: Skagit River

High Hazard

Failure would likely cause loss of life

Key Facts

Dam Type
Concrete
Height
389 ft
Dam Length
1,180 ft
Reservoir Storage
89,200 acre-ft
Year Completed
1929
Primary Purpose
Hydroelectric
Owner Type
Local Government
Max Discharge
105,300 cfs

Condition Assessment

SatisfactoryLast inspected: 2022-08-16

Hazard Classification: High — This describes the potential consequences of dam failure, not the likelihood of failure.

Condition Assessment: Satisfactory — This describes the current physical condition of the dam based on the most recent inspection.

Location

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Quick Stats

NID ID
WA00170
State
Washington (WA)
Coordinates
48.71340, -121.13180
Age
97 years

Nearby Dams

External Resources

Data sourced from the National Inventory of Dams (NID). Information may not reflect the most current status of this dam. Hazard classification reflects potential consequences of failure, not the likelihood of failure or the current condition.