Steffen Dam
Steffen Dam is an earth dam located in Gregory County, South Dakota, built in 2007. It carries a Low hazard potential classification.
About Steffen Dam
The primary purpose of Steffen 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 David Steffen (private). It impounds the Tr-ponca Creek.
The dam stands 24 feet tall and stretches 450 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 103 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 2007, 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.
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Location
| State | South Dakota |
| County | Gregory |
| River/Stream | Tr-ponca Creek |
| Coordinates | 43.14273, -99.34954 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 450 ft |
| Year Completed | 2007 (19 years old) |
Storage & Hydraulics
| NID Storage | 103 acre-ft |
| Max Storage | 103 acre-ft |
| Normal Storage | 59 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 675 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | DAVID STEFFEN |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02569 |
| Federal ID | SD02569 |
| More Info | State Dam Safety Program |