O'Connell Dam
Key Takeaway
O'Connell Dam is classified as significant hazard in South Dakota. It was completed in 1999 and is 27 years old. Its primary use is fire protection. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 32 ft (taller than 90.4% in SD) |
| Dam Length | 200 ft |
| Dam Type | Earth |
| Max Storage | 71 acre-ft |
| Normal Storage | 34 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,150 cfs |
| Year Completed | 1999 (27 years old) |
| Year Modified | 2000 |
| NID ID | SD02443 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
GLENN O'CONNELL
Private
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Low Hazard 12 ftFrequently Asked Questions
What is the hazard classification of O'Connell Dam?
O'Connell Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates O'Connell Dam?
O'Connell Dam is owned by GLENN O'CONNELL (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was O'Connell Dam built?
O'Connell Dam was completed in 1999, making it 27 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 O'Connell Dam?
O'Connell Dam 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 O'Connell Dam?
O'Connell Dam has a dam height of 32 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.