Tribal is an earth dam located in Stanley County, South Dakota, built in 1957. It carries a Low hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall and 620 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 Tribal
The primary purpose of Tribal 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 Lower Brule Tribe (federal). It impounds the Tr-antelope Creek.
The dam stands 24 feet tall and stretches 620 feet across, and has a maximum storage capacity of 63 acre-feet. Completed in 1957, 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.
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Location
| State | South Dakota |
| County | Stanley |
| Nearest City | None |
| River/Stream | Tr-antelope Creek |
| Coordinates | 44.22166, -99.99999 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 620 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 63 acre-ft |
| Max Storage | 63 acre-ft |
| Normal Storage | 27 acre-ft |
| Max Discharge | 625 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Lower Brule Tribe |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01542 |
| Federal ID | SD01542 |
| More Info | State Dam Safety Program |