Sd Noname 147 is an earth dam located in Jackson County, South Dakota, built in 1960. It carries a Significant hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall and 750 ft long, taller than 59% 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 Sd Noname 147
The primary purpose of Sd Noname 147 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Whidby Bros. (private). It impounds the Tr-white River.
The dam stands 27 feet tall and stretches 750 feet across, and has a maximum storage capacity of 285 acre-feet. Completed in 1960, the structure is well into its service life at over 50 years old.
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 | Jackson |
| Nearest City | None |
| River/Stream | Tr-white River |
| Coordinates | 43.78333, -101.56832 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 750 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 285 acre-ft |
| Max Storage | 285 acre-ft |
| Normal Storage | 210 acre-ft |
| Max Discharge | 720 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Whidby Bros. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02007 |
| Federal ID | SD02007 |
| More Info | State Dam Safety Program |