He Dog
Key Takeaway
He Dog is classified as high hazard in South Dakota. It was completed in 1936 and is 90 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 Length | 1,800 ft |
| Dam Type | Earth |
| Normal Storage | 550 acre-ft |
| Year Completed | 1936 (90 years old) |
| NID ID | SD02144 |
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
BIA
Federal Government
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Low Hazard 28 ftFrequently Asked Questions
What is the hazard classification of He Dog?
He Dog 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 He Dog?
He Dog is owned by BIA (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was He Dog built?
He Dog was completed in 1936, making it 90 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 He Dog?
He Dog serves the following purposes: Irrigation, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was He Dog last inspected?
He Dog was last inspected on August 7, 2012. Inspection dates indicate when a formal review occurred, not the results of that inspection.