Alcorn
Alcorn is an earth dam located in Harding County, South Dakota, built in 1951. It carries a Low hazard potential classification.
About Alcorn
The primary purpose of Alcorn 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 Clarkson & Cattle (private). It impounds the Trib-s Fork Grand River.
The dam stands 15 feet tall and stretches 1,000 feet across, and has a maximum storage capacity of 104 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | South Dakota |
| County | Harding |
| Nearest City | None |
| River/Stream | Trib-s Fork Grand River |
| Coordinates | 45.73499, -103.58499 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 104 acre-ft |
| Max Storage | 104 acre-ft |
| Normal Storage | 84 acre-ft |
| Max Discharge | 1,470 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | CLARKSON & CATTLE |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00627 |
| Federal ID | SD00627 |
| More Info | State Dam Safety Program |