Standing Rock Tribe is an earth dam located in Corson County, South Dakota, built in 1934. It carries a Significant hazard potential classification.
Dam profile
NID height · 22 ft22 ft tall and 370 ft long. 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 Standing Rock Tribe
The primary purpose of Standing Rock Tribe is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Standing Rock Tribe (federal). It impounds the Tr-oak Creek near Wakpala.
The dam stands 22 feet tall and stretches 370 feet across, and has a maximum storage capacity of 194 acre-feet. Completed in 1934, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
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Location
| State | South Dakota |
| County | Corson |
| Nearest City | Wakpala |
| River/Stream | Tr-oak Creek |
| Coordinates | 45.75832, -100.53332 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 370 ft |
| Year Completed | 1934 (92 years old) |
Storage & Hydraulics
| NID Storage | 194 acre-ft |
| Max Storage | 194 acre-ft |
| Normal Storage | 84 acre-ft |
| Max Discharge | 1,336 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Standing Rock Tribe |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00727 |
| Federal ID | SD00727 |
| More Info | State Dam Safety Program |