State-Murphy Dam
Key Takeaway
State-Murphy Dam is classified as low hazard in Montana. It was completed in 1936 and is 90 years old. Its primary use is other.
Physical Details
| Dam Height | 15 ft (taller than 18.8% in MT) |
| Dam Length | 530 ft |
| Dam Type | Earth |
| Max Storage | 87 acre-ft |
| Normal Storage | 70 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 854 sq mi |
| Year Completed | 1936 (90 years old) |
| NID ID | MT03966 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
STATE OF MONTANA, D.N.R.C., T.L.M.D.
State Government
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Low Hazard 25 ftMurphy and Sons #2
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Low Hazard 30 ftFrequently Asked Questions
What is the hazard classification of State-Murphy Dam?
State-Murphy Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates State-Murphy Dam?
State-Murphy Dam is owned by STATE OF MONTANA, D.N.R.C., T.L.M.D. (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was State-Murphy Dam built?
State-Murphy Dam was completed in 1936, making it 90 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of State-Murphy Dam?
State-Murphy Dam serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is State-Murphy Dam?
State-Murphy Dam has a dam height of 15 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was State-Murphy Dam last inspected?
State-Murphy Dam was last inspected on June 4, 2012. Inspection dates indicate when a formal review occurred, not the results of that inspection.