Riedy Dam
Key Takeaway
Riedy Dam is classified as low hazard in South Dakota. It was completed in 1934 and is 92 years old. Its primary use is recreation.
Physical Details
| Dam Height | 22 ft (taller than 45.6% in SD) |
| Dam Length | 350 ft |
| Dam Type | Earth |
| Max Storage | 150 acre-ft |
| Normal Storage | 54 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 2,180 cfs |
| Year Completed | 1934 (92 years old) |
| Year Modified | 1999 |
| NID ID | SD00924 |
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
FRANCIS CONNOLLY
Private
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Low Hazard 17 ftFrequently Asked Questions
What is the hazard classification of Riedy Dam?
Riedy 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 Riedy Dam?
Riedy Dam is owned by FRANCIS CONNOLLY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Riedy Dam built?
Riedy Dam was completed in 1934, making it 92 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 Riedy Dam?
Riedy Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Riedy Dam?
Riedy Dam has a dam height of 22 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.
When was Riedy Dam last inspected?
Riedy Dam was last inspected on December 6, 1999. Inspection dates indicate when a formal review occurred, not the results of that inspection.