Henry Dam
Key Takeaway
Henry Dam is classified as low hazard in South Dakota. It was completed in 1951 and is 75 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 20 ft (taller than 33.7% in SD) |
| Dam Length | 950 ft |
| Dam Type | Earth |
| Max Storage | 160 acre-ft |
| Normal Storage | 122 acre-ft |
| Max Discharge | 650 cfs |
| Year Completed | 1951 (75 years old) |
| NID ID | SD01042 |
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
DON HENRY
Private
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Low Hazard 26 ftFrequently Asked Questions
What is the hazard classification of Henry Dam?
Henry Dam 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 Henry Dam?
Henry Dam is owned by DON HENRY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Henry Dam built?
Henry Dam was completed in 1951, making it 75 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 Henry Dam?
Henry Dam serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Henry Dam?
Henry Dam has a dam height of 20 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.