Grady Wilson Jr. is an earth dam located in Perkins County, South Dakota, built in 1951. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 280 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 Grady Wilson Jr.
The primary purpose of Grady Wilson Jr. 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 Grady Wilson Jr. (private). It impounds the Trib. Moreau River.
The dam stands 20 feet tall and stretches 280 feet across, and has a maximum storage capacity of 54 acre-feet. Completed in 1951, the structure is well into its service life at over 50 years old.
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 | Perkins |
| Nearest City | None |
| River/Stream | Trib. Moreau River |
| Coordinates | 45.15333, -102.45832 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 280 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 40 acre-ft |
| Max Discharge | 150 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Grady Wilson Jr. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01758 |
| Federal ID | SD01758 |
| More Info | State Dam Safety Program |