Mckinley Lake
Key Takeaway
Mckinley Lake is classified as significant hazard in Montana. It was completed in 1923 and is 103 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 7 ft (taller than 0.1% in MT) |
| Dam Length | 364 ft |
| Dam Type | Earth |
| Max Storage | 168 acre-ft |
| Normal Storage | 152 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 91 cfs |
| Year Completed | 1923 (103 years old) |
| NID ID | MT01460 |
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
CITY OF MISSOULA
Local Government
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Significant Hazard 29 ftFrequently Asked Questions
What is the hazard classification of Mckinley Lake?
Mckinley Lake 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 Mckinley Lake?
Mckinley Lake is owned by CITY OF MISSOULA (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mckinley Lake built?
Mckinley Lake was completed in 1923, making it 103 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 Mckinley Lake?
Mckinley Lake serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mckinley Lake?
Mckinley Lake has a dam height of 7 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 Mckinley Lake last inspected?
Mckinley Lake was last inspected on August 1, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.