Alvin
Alvin is an earth dam located in Lincoln County, South Dakota, built in 1954. It carries a Low hazard potential classification.
About Alvin
The primary purpose of Alvin is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Gf&p (state). It impounds the Nine Mile Creek near Canton.
The dam stands 36 feet tall and stretches 600 feet across, creates a reservoir covering 46 acres, and has a maximum storage capacity of 2,150 acre-feet. Completed in 1954, 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. The most recent inspection on record was 10/04/2022.
At 36 feet, this dam is taller than 83% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | South Dakota |
| County | Lincoln |
| Nearest City | Canton |
| River/Stream | Nine Mile Creek |
| Coordinates | 43.43993, -96.61063 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 36 ft |
| Dam Height | 36 ft |
| Dam Length | 600 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 2,150 acre-ft |
| Max Storage | 2,150 acre-ft |
| Normal Storage | 1,288 acre-ft |
| Surface Area | 46 acres |
| Max Discharge | 8,500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | GF&P |
| Owner Type | State |
| Hazard Classification | Low |
| Last Inspection | 10/04/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00029 |
| Federal ID | SD00029 |
| More Info | State Dam Safety Program |