Bismark Lake
Key Takeaway
Bismark Lake is classified as high hazard in South Dakota. It was completed in 1937 and is 89 years old. Its primary use is recreation. 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 | 38 ft (taller than 95.8% in SD) |
| Dam Length | 280 ft |
| Dam Type | Earth |
| Max Storage | 626 acre-ft |
| Normal Storage | 297 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 2,087 cfs |
| Year Completed | 1937 (89 years old) |
| NID ID | SD01116 |
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
USDA FS
Federal Government
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High Hazard 42 ftFrequently Asked Questions
What is the hazard classification of Bismark Lake?
Bismark Lake 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 Bismark Lake?
Bismark Lake is owned by USDA FS (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Bismark Lake built?
Bismark Lake was completed in 1937, making it 89 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 Bismark Lake?
Bismark Lake serves the following purposes: Recreation, Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Bismark Lake?
Bismark Lake has a dam height of 38 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 Bismark Lake last inspected?
Bismark Lake was last inspected on September 27, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.