Pr-71 Retention Dam
Key Takeaway
Pr-71 Retention Dam is classified as low hazard in Montana. It was completed in 1936 and is 90 years old. Its primary use is fire protection.
Physical Details
| Dam Length | 581 ft |
| Dam Type | Gravity |
| Max Storage | 131 acre-ft |
| Surface Area | 34 acres |
| Drainage Area | 3 sq mi |
| Year Completed | 1936 (90 years old) |
| Year Modified | 1966 |
| NID ID | MT03932 |
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
DOI BLM
Federal Government
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Meeting Place
Phillips, MT
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Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Pr-71 Retention Dam?
Pr-71 Retention 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 Pr-71 Retention Dam?
Pr-71 Retention Dam is owned by DOI BLM (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Pr-71 Retention Dam built?
Pr-71 Retention 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 Pr-71 Retention Dam?
Pr-71 Retention Dam serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Pr-71 Retention Dam last inspected?
Pr-71 Retention Dam was last inspected on August 15, 2016. Inspection dates indicate when a formal review occurred, not the results of that inspection.