Hanson
Key Takeaway
Hanson is classified as low hazard in Montana. It was completed in 1965 and is 61 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 19 ft (taller than 42.9% in MT) |
| Dam Length | 304 ft |
| Dam Type | Earth |
| Max Storage | 55 acre-ft |
| Normal Storage | 50 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 350 cfs |
| Year Completed | 1965 (61 years old) |
| NID ID | MT00996 |
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
A. HANSON
Private
Nearby Dams
Allie
Valley, MT
Significant Hazard 30 ftNyquist #1
Valley, MT
Low Hazard 15 ftGlasgow Sewage Lagoon
Valley, MT
Low Hazard 9 ftSweet Carolyn
Valley, MT
Significant Hazard 26 ftBig Deal
Valley, MT
Low Hazard 25 ftThe Man Dam
Valley, MT
Low HazardGreenwood #2
Valley, MT
Low Hazard 27 ftWhatshisname
Valley, MT
Low Hazard 16 ftFrequently Asked Questions
What is the hazard classification of Hanson?
Hanson 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 Hanson?
Hanson is owned by A. HANSON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hanson built?
Hanson was completed in 1965, making it 61 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?
Hanson 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?
Hanson has a dam height of 19 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.