Alfred Cowan
Key Takeaway
Alfred Cowan is classified as low hazard in South Dakota. It was completed in 1940 and is 86 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 23 ft (taller than 49.8% in SD) |
| Dam Length | 584 ft |
| Dam Type | Earth |
| Max Storage | 192 acre-ft |
| Normal Storage | 106 acre-ft |
| Max Discharge | 340 cfs |
| Year Completed | 1940 (86 years old) |
| NID ID | SD00590 |
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
ALFRED COWAN
Private
Nearby Dams
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Low Hazard 21 ftFrequently Asked Questions
What is the hazard classification of Alfred Cowan?
Alfred Cowan 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 Alfred Cowan?
Alfred Cowan is owned by ALFRED COWAN (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Alfred Cowan built?
Alfred Cowan was completed in 1940, making it 86 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 Alfred Cowan?
Alfred Cowan 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 Alfred Cowan?
Alfred Cowan has a dam height of 23 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.