Herman Number 20
Key Takeaway
Herman Number 20 is classified as low hazard in South Dakota. It was completed in 1960 and is 66 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 28 ft (taller than 77.7% in SD) |
| Dam Length | 542 ft |
| Dam Type | Earth |
| Max Storage | 27 acre-ft |
| Normal Storage | 16 acre-ft |
| Max Discharge | 756 cfs |
| Year Completed | 1960 (66 years old) |
| NID ID | SD01617 |
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
HERMAN FARMS
Private
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Low Hazard 27 ftFrequently Asked Questions
What is the hazard classification of Herman Number 20?
Herman Number 20 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 Herman Number 20?
Herman Number 20 is owned by HERMAN FARMS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Herman Number 20 built?
Herman Number 20 was completed in 1960, making it 66 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 Herman Number 20?
Herman Number 20 serves the following purposes: Fire Protection, Stock, Or Small Fish Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Herman Number 20?
Herman Number 20 has a dam height of 28 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.