Yellowtail Afterbay Dam

Big Horn County, Montana (near SAINT XAVIER)

River/Stream: BIGHORN RIVER

High Hazard

Failure would likely cause loss of life

Key Facts

Dam Type
Concrete
Height
72 ft
Dam Length
1,360 ft
Reservoir Storage
2,877 acre-ft
Year Completed
1966
Primary Purpose
Hydroelectric
Owner Type
Federal
Max Discharge
15,500 cfs

Condition Assessment

Not AvailableLast inspected: 2023-04-25

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

Condition Assessment: Not Available — This describes the current physical condition of the dam based on the most recent inspection.

Location

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Quick Stats

NID ID
MT00576
State
Montana (MT)
Coordinates
45.31630, -107.92160
Age
60 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.