Pothast Dam is an earth dam located in Ziebach County, South Dakota, built in 2003. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 470 ft long, taller than 68% 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 Pothast Dam
The primary purpose of Pothast Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by William Pothast (private). It impounds the Tr. Rudy Creek.
The dam stands 30 feet tall and stretches 470 feet across, creates a reservoir covering 4 acres, and has a maximum storage capacity of 76 acre-feet. Completed in 2003, the structure is relatively new.
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. The most recent inspection on record was 10/26/2005. That was over 20 years ago.
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Location
| State | South Dakota |
| County | Ziebach |
| River/Stream | Tr. Rudy Creek |
| Coordinates | 44.90919, -101.34480 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 470 ft |
| Year Completed | 2003 (23 years old) |
Storage & Hydraulics
| NID Storage | 76 acre-ft |
| Max Storage | 76 acre-ft |
| Normal Storage | 38 acre-ft |
| Surface Area | 4 acres |
| Max Discharge | 880 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | William Pothast |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/26/2005 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02535 |
| Federal ID | SD02535 |
| More Info | State Dam Safety Program |