Selvin Johnson
Selvin Johnson is an earth dam located in Pennington County, South Dakota, built in 1935. It carries a Low hazard potential classification.
About Selvin Johnson
The primary purpose of Selvin Johnson 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 Selvin Johnson (private). It impounds the Tr Cheyenne.
The dam stands 26 feet tall and stretches 450 feet across, and has a maximum storage capacity of 80 acre-feet. Completed in 1935, the structure is well-established, with more than 75 years of service.
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 | Pennington |
| Nearest City | None |
| River/Stream | Tr Cheyenne |
| Coordinates | 44.35666, -102.18999 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 450 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 60 acre-ft |
| Max Discharge | 850 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | SELVIN JOHNSON |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02059 |
| Federal ID | SD02059 |
| More Info | State Dam Safety Program |