Hanley
Key Takeaway
Hanley is classified as low hazard in Montana. It was completed in 1936 and is 90 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 15 ft (taller than 18.8% in MT) |
| Dam Length | 504 ft |
| Dam Type | Earth |
| Max Storage | 579 acre-ft |
| Normal Storage | 172 acre-ft |
| Year Completed | 1936 (90 years old) |
| NID ID | MT00096 |
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
XX LAND CO
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Hanley?
Hanley 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 Hanley?
Hanley is owned by XX LAND CO (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hanley built?
Hanley 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 Hanley?
Hanley 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 Hanley?
Hanley has a dam height of 15 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.