South Fork Impoundment
South Fork Impoundment is an earth dam located in Perkins County, South Dakota, built in 1992. It carries a Low hazard potential classification.
About South Fork Impoundment
The primary purpose of South Fork Impoundment is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Usda Fs (federal). It impounds the N.fork-s.fork-grand River near Shadehill.
The dam stands 16 feet tall and stretches 675 feet across, creates a reservoir covering 21 acres, has a maximum storage capacity of 87 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1992, the structure is 34 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. The most recent inspection on record was 10/20/2017.
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Location
| State | South Dakota |
| County | Perkins |
| Nearest City | Shadehill |
| River/Stream | N.fork-s.fork-grand River |
| Coordinates | 45.66600, -102.54440 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 675 ft |
| Year Completed | 1992 (34 years old) |
Storage & Hydraulics
| NID Storage | 148 acre-ft |
| Max Storage | 87 acre-ft |
| Normal Storage | 148 acre-ft |
| Surface Area | 21 acres |
| Drainage Area | 6 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | USDA FS |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 10/20/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02222 |
| Federal ID | SD02222 |
| More Info | State Dam Safety Program |