Hanson Reservoir Dam
Key Takeaway
Hanson Reservoir Dam is classified as significant hazard in Montana. It was completed in 1932 and is 94 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 13 ft (taller than 14.7% in MT) |
| Dam Length | 477 ft |
| Dam Type | Earth |
| Max Storage | 240 acre-ft |
| Normal Storage | 84 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 29 sq mi |
| Max Discharge | 470 cfs |
| Year Completed | 1932 (94 years old) |
| NID ID | MT03207 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
ELMER HANSON
Private
Nearby Dams
Springdale Colony
Meagher, MT
Low Hazard 30 ftSpringdale
Meagher, MT
Low Hazard 20 ftJackson Lake Dam
Meagher, MT
High Hazard 32 ftOnion Head
Meagher, MT
Low Hazard 29 ftScrewed Up
Meagher, MT
Low Hazard 10 ftSpringdale #3
Meagher, MT
Low Hazard 10 ftSpringdale #4
Meagher, MT
Low Hazard 26 ftWhite Sulphur Springs Sewage Disposal
Meagher, MT
Low Hazard 8 ftFrequently Asked Questions
What is the hazard classification of Hanson Reservoir Dam?
Hanson Reservoir Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Hanson Reservoir Dam?
Hanson Reservoir Dam is owned by ELMER HANSON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hanson Reservoir Dam built?
Hanson Reservoir Dam was completed in 1932, making it 94 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 Hanson Reservoir Dam?
Hanson Reservoir Dam serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Hanson Reservoir Dam?
Hanson Reservoir Dam has a dam height of 13 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 Hanson Reservoir Dam last inspected?
Hanson Reservoir Dam was last inspected on March 1, 1981. Inspection dates indicate when a formal review occurred, not the results of that inspection.