Armstrong Irr. Dam
Key Takeaway
Armstrong Irr. Dam is classified as low hazard in South Dakota. It was completed in 1974 and is 52 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 21 ft (taller than 40.7% in SD) |
| Dam Length | 568 ft |
| Dam Type | Earth |
| Max Storage | 125 acre-ft |
| Normal Storage | 65 acre-ft |
| Max Discharge | 1,028 cfs |
| Year Completed | 1974 (52 years old) |
| NID ID | SD02318 |
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
EUGENE ARMSTRONG
Private
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What is the hazard classification of Armstrong Irr. Dam?
Armstrong Irr. 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 Armstrong Irr. Dam?
Armstrong Irr. Dam is owned by EUGENE ARMSTRONG (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Armstrong Irr. Dam built?
Armstrong Irr. Dam was completed in 1974, making it 52 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 Armstrong Irr. Dam?
Armstrong Irr. Dam serves the following purposes: Fire Protection, Stock, Or Small Fish Pond, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Armstrong Irr. Dam?
Armstrong Irr. Dam has a dam height of 21 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.