Oscar Micheaux Dam is an earth dam located in Gregory County, South Dakota, built in 1974. It carries a Low hazard potential classification.
Dam profile
NID height · 40 ft40 ft tall and 580 ft long, taller than 86% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Oscar Micheaux Dam
The primary purpose of Oscar Micheaux Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Thoene Land & Cattle LLC (private). It impounds the Oscar Micheaux Creek.
The dam stands 40 feet tall and stretches 580 feet across, and has a maximum storage capacity of 600 acre-feet. Completed in 1974, the structure is well into its service life at over 50 years old.
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.
At 40 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | South Dakota |
| County | Gregory |
| Nearest City | None |
| River/Stream | Oscar Micheaux Creek |
| Coordinates | 43.01808, -99.11949 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 580 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 600 acre-ft |
| Max Storage | 600 acre-ft |
| Normal Storage | 417 acre-ft |
| Max Discharge | 6,200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Thoene Land & Cattle LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02176 |
| Federal ID | SD02176 |
| More Info | State Dam Safety Program |