Leger Irrigation is an earth dam located in Harding County, South Dakota, built in 1950. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 510 ft long, taller than 62% 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 Leger Irrigation
The primary purpose of Leger Irrigation is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by William Leger (private). It impounds the S Fork Moreau River Trib.
The dam stands 28 feet tall and stretches 510 feet across, and has a maximum storage capacity of 325 acre-feet. Completed in 1950, 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 | Harding |
| Nearest City | None |
| River/Stream | S Fork Moreau River Trib |
| Coordinates | 45.30627, -103.75493 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 510 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 325 acre-ft |
| Max Storage | 325 acre-ft |
| Normal Storage | 255 acre-ft |
| Max Discharge | 1,500 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | William Leger |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00636 |
| Federal ID | SD00636 |
| More Info | State Dam Safety Program |