Sd Noname 185 is an earth dam located in Jackson County, South Dakota, built in 1950. It carries a Significant hazard potential classification.
Dam profile
NID height · 22 ft22 ft tall and 520 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 Sd Noname 185
The primary purpose of Sd Noname 185 is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Olson (private). It impounds the Trib. White River.
The dam stands 22 feet tall and stretches 520 feet across, and has a maximum storage capacity of 70 acre-feet. Completed in 1950, 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 | Jackson |
| Nearest City | None |
| River/Stream | Trib. White River |
| Coordinates | 43.71333, -101.52166 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 520 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 70 acre-ft |
| Max Storage | 70 acre-ft |
| Normal Storage | 35 acre-ft |
| Max Discharge | 1,200 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Olson |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02125 |
| Federal ID | SD02125 |
| More Info | State Dam Safety Program |