Oleary
Oleary is an earth dam located in Dewey County, South Dakota, built in 1945. It carries a Low hazard potential classification.
About Oleary
The primary purpose of Oleary is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by James And Margaret Oleary (private). It impounds the Tr Moreau.
The dam stands 15 feet tall and stretches 600 feet across, and has a maximum storage capacity of 80 acre-feet. Completed in 1945, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | South Dakota |
| County | Dewey |
| Nearest City | None |
| River/Stream | Tr Moreau |
| Coordinates | 45.26499, -101.22499 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 600 ft |
| Year Completed | 1945 (81 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 32 acre-ft |
| Max Discharge | 1,800 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | JAMES AND MARGARET OLEARY |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01674 |
| Federal ID | SD01674 |
| More Info | State Dam Safety Program |