Conleys Lake (Powell)
Key Takeaway
Conleys Lake (Powell) is classified as low hazard in Montana. It was completed in 1958 and is 68 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 11 ft (taller than 8.4% in MT) |
| Dam Length | 800 ft |
| Dam Type | Earth |
| Max Storage | 81 acre-ft |
| Normal Storage | 81 acre-ft |
| Surface Area | 14 acres |
| Year Completed | 1958 (68 years old) |
| NID ID | MT01383 |
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
STATE OF MONTANA, D.O.C.
State Government
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Low Hazard 8 ftFrequently Asked Questions
What is the hazard classification of Conleys Lake (Powell)?
Conleys Lake (Powell) 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 Conleys Lake (Powell)?
Conleys Lake (Powell) is owned by STATE OF MONTANA, D.O.C. (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Conleys Lake (Powell) built?
Conleys Lake (Powell) was completed in 1958, making it 68 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 Conleys Lake (Powell)?
Conleys Lake (Powell) 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 Conleys Lake (Powell)?
Conleys Lake (Powell) has a dam height of 11 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.