Longhorn #1/Horny Detention Dam
Key Takeaway
Longhorn #1/Horny Detention Dam is classified as low hazard in Montana. It was completed in 1966 and is 60 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Length | 666 ft |
| Dam Type | Gravity |
| Max Storage | 100 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1966 (60 years old) |
| NID ID | MT00737 |
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
Long Horn #1 Dam
Valley, MT
Low HazardToprail Dam
Valley, MT
Low HazardSob Detention Dam
Valley, MT
Low HazardFoulweather Detention Dam
Valley, MT
Low HazardHard Rock Detention Dam
Valley, MT
Low HazardWinkum Dam
Valley, MT
Low HazardClover Drop Dam
Valley, MT
Low HazardU.L.T. Detention Dam
Valley, MT
Low HazardFrequently Asked Questions
What is the hazard classification of Longhorn #1/Horny Detention Dam?
Longhorn #1/Horny Detention 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 Longhorn #1/Horny Detention Dam?
Longhorn #1/Horny Detention Dam is owned by DOI BLM (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Longhorn #1/Horny Detention Dam built?
Longhorn #1/Horny Detention Dam was completed in 1966, making it 60 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 Longhorn #1/Horny Detention Dam?
Longhorn #1/Horny Detention 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 Longhorn #1/Horny Detention Dam last inspected?
Longhorn #1/Horny Detention Dam was last inspected on December 2, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.