Wilson Ranch Dam is an earth dam located in Custer County, South Dakota, built in 1940. It carries a Low hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall and 600 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 Wilson Ranch Dam
The primary purpose of Wilson Ranch Dam 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 Frank D. Wilson (private). It impounds the Tributary of Cheyenne River.
The dam stands 24 feet tall and stretches 600 feet across, and has a maximum storage capacity of 129 acre-feet. Completed in 1940, 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 | Custer |
| Nearest City | None |
| River/Stream | Tributary of Cheyenne River |
| Coordinates | 43.59833, -103.05499 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 600 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 129 acre-ft |
| Max Storage | 129 acre-ft |
| Normal Storage | 98 acre-ft |
| Max Discharge | 1,760 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Frank D. Wilson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01381 |
| Federal ID | SD01381 |
| More Info | State Dam Safety Program |