Standing Rock Tribe
Standing Rock Tribe is an earth dam located in Corson County, South Dakota, built in 1939. It carries a Significant hazard potential classification.
About Standing Rock Tribe
The primary purpose of Standing Rock Tribe is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Standing Rock Tribe (federal). It impounds the Tr-oak Creek near Wakpala.
The dam stands 21 feet tall and stretches 445 feet across, and has a maximum storage capacity of 118 acre-feet. Completed in 1939, 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 | 45.72999, -100.65166 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 445 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 118 acre-ft |
| Max Storage | 118 acre-ft |
| Normal Storage | 65 acre-ft |
| Max Discharge | 2,940 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | STANDING ROCK TRIBE |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00723 |
| Federal ID | SD00723 |
| More Info | State Dam Safety Program |