Castle Rock Reservoir Dam

Rosebud County, Montana (near FORSYTH)

River/Stream: TR-EAST FORK ARMELLS CREEK

High Hazard

Failure would likely cause loss of life

Key Facts

Dam Type
Earth
Height
67 ft
Dam Length
1,095 ft
Reservoir Storage
3,540 acre-ft
Year Completed
1976
Primary Purpose
Other
Owner Type
Public Utility
Max Discharge
2,820 cfs

Condition Assessment

SatisfactoryLast inspected: 2015-07-15

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
MT01982
State
Montana (MT)
Coordinates
45.89500, -106.63640
Age
50 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.