Mannix
Key Takeaway
Mannix is classified as low hazard in Montana. It was completed in 1962 and is 64 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 30 ft (taller than 82.7% in MT) |
| Dam Length | 150 ft |
| Dam Type | Earth |
| Max Storage | 53 acre-ft |
| Normal Storage | 34 acre-ft |
| Year Completed | 1962 (64 years old) |
| NID ID | MT01388 |
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
F MANNIX
Private
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Low Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Mannix?
Mannix 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 Mannix?
Mannix is owned by F MANNIX (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mannix built?
Mannix was completed in 1962, making it 64 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 Mannix?
Mannix 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 Mannix?
Mannix has a dam height of 30 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.