Oleary
Key Takeaway
Oleary is classified as low hazard in South Dakota. It was completed in 1945 and is 81 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 15 ft (taller than 11.1% in SD) |
| Dam Length | 600 ft |
| Dam Type | Earth |
| Max Storage | 80 acre-ft |
| Normal Storage | 32 acre-ft |
| Max Discharge | 1,800 cfs |
| Year Completed | 1945 (81 years old) |
| NID ID | SD01674 |
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
JAMES AND MARGARET OLEARY
Private
Nearby Dams
B. Oleary
Dewey, SD
Low Hazard 18 ftOleary Ranch 1
Dewey, SD
Low Hazard 31 ftOleary Ranch 2
Dewey, SD
Low Hazard 23 ftThorstensen 1
Dewey, SD
Low Hazard 26 ftA. Lee
Dewey, SD
Low Hazard 20 ftThorstensen 2
Dewey, SD
Low Hazard 28 ftFred Joens
Dewey, SD
Low Hazard 16 ftG. French Homestead
Dewey, SD
Low Hazard 42 ftFrequently Asked Questions
What is the hazard classification of Oleary?
Oleary 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 Oleary?
Oleary is owned by JAMES AND MARGARET OLEARY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Oleary built?
Oleary was completed in 1945, making it 81 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 Oleary?
Oleary 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 Oleary?
Oleary has a dam height of 15 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.