Lima
Key Takeaway
Lima is classified as high hazard in Montana. It was completed in 1934 and is 92 years old. Its primary use is irrigation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 56 ft (taller than 97.3% in MT) |
| Dam Length | 455 ft |
| Dam Type | Earth |
| Max Storage | 133.0K acre-ft |
| Normal Storage | 75.2K acre-ft |
| Surface Area | 5,900 acres |
| Drainage Area | 570 sq mi |
| Max Discharge | 47,714 cfs |
| Year Completed | 1934 (92 years old) |
| NID ID | MT00905 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
BEAVERHEAD COUNTY RED ROCK RIVER WATER/SEWER DIST.
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lima?
Lima is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lima?
Lima is owned by BEAVERHEAD COUNTY RED ROCK RIVER WATER/SEWER DIST. (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lima built?
Lima was completed in 1934, making it 92 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 Lima?
Lima 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 Lima?
Lima has a dam height of 56 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 Lima last inspected?
Lima was last inspected on April 20, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.