Broadwater Dam
Key Takeaway
Broadwater Dam is classified as high hazard in Montana. It was completed in 1940 and is 86 years old. Its primary use is hydroelectric. 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 | 24 ft (taller than 67.5% in MT) |
| Dam Length | 705 ft |
| Dam Type | Gravity |
| Max Storage | 6.5K acre-ft |
| Normal Storage | 4.1K acre-ft |
| Surface Area | 327 acres |
| Drainage Area | 14,660 sq mi |
| Max Discharge | 68,900 cfs |
| Year Completed | 1940 (86 years old) |
| NID ID | MT00016 |
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
Montana Dept of Natural Resources & Conservation
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Broadwater Dam?
Broadwater Dam 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 Broadwater Dam?
Broadwater Dam is owned by Montana Dept of Natural Resources & Conservation (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Broadwater Dam built?
Broadwater Dam was completed in 1940, making it 86 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 Broadwater Dam?
Broadwater Dam serves the following purposes: Hydroelectric, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Broadwater Dam?
Broadwater Dam has a dam height of 24 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 Broadwater Dam last inspected?
Broadwater Dam was last inspected on March 25, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.