Pr-156 Retention Dam
Key Takeaway
Pr-156 Retention Dam is classified as low hazard in Montana. It was completed in 1937 and is 89 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Length | 396 ft |
| Dam Type | Gravity |
| Max Storage | 79 acre-ft |
| Normal Storage | 79 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1937 (89 years old) |
| Year Modified | 1936 |
| NID ID | MT00766 |
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
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Pr-156 Retention Dam?
Pr-156 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-156 Retention Dam?
Pr-156 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-156 Retention Dam built?
Pr-156 Retention Dam was completed in 1937, making it 89 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-156 Retention Dam?
Pr-156 Retention Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Pr-156 Retention Dam last inspected?
Pr-156 Retention Dam was last inspected on September 1, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.