Hett No.2
Key Takeaway
Hett No.2 is classified as low hazard in South Dakota. It was completed in 1949 and is 77 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 19 ft (taller than 29.5% in SD) |
| Dam Length | 395 ft |
| Dam Type | Earth |
| Max Storage | 142 acre-ft |
| Normal Storage | 75 acre-ft |
| Max Discharge | 420 cfs |
| Year Completed | 1949 (77 years old) |
| NID ID | SD01869 |
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 HETT
Private
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Low Hazard 13 ftFrequently Asked Questions
What is the hazard classification of Hett No.2?
Hett No.2 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 Hett No.2?
Hett No.2 is owned by DON HETT (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hett No.2 built?
Hett No.2 was completed in 1949, making it 77 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 Hett No.2?
Hett No.2 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 Hett No.2?
Hett No.2 has a dam height of 19 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.