Stony Lake
Key Takeaway
Stony Lake is classified as low hazard in Montana. It was completed in 1979 and is 47 years old. Its primary use is other.
Physical Details
| Dam Height | 8 ft (taller than 0.5% in MT) |
| Dam Length | 110 ft |
| Dam Type | Earth |
| Max Storage | 83 acre-ft |
| Normal Storage | 67 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 44 cfs |
| Year Completed | 1979 (47 years old) |
| NID ID | MT03808 |
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
USDA FS
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Stony Lake?
Stony Lake 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 Stony Lake?
Stony Lake is owned by USDA FS (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Stony Lake built?
Stony Lake was completed in 1979, making it 47 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 Stony Lake?
Stony Lake serves the following purposes: Other, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Stony Lake?
Stony Lake has a dam height of 8 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 Stony Lake last inspected?
Stony Lake was last inspected on September 20, 2016. Inspection dates indicate when a formal review occurred, not the results of that inspection.