Mina is an earth dam located in Edmunds County, South Dakota, built in 1934. It carries a Significant hazard potential classification.
Dam profile
NID height · 32 ft32 ft tall and 360 ft long, taller than 74% of U.S. dams with a recorded height. 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 Mina
The primary purpose of Mina is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Gf&p (state). It impounds the Snake Creek.
The dam stands 32 feet tall and stretches 360 feet across, creates a reservoir covering 850 acres, has a maximum storage capacity of 19,000 acre-feet, and collects water from a drainage area of 220 square miles. Completed in 1934, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 11/21/2022.
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Location
| State | South Dakota |
| County | Edmunds |
| Nearest City | None |
| River/Stream | Snake Creek |
| Coordinates | 45.43988, -98.73107 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 360 ft |
| Year Completed | 1934 (92 years old) |
Storage & Hydraulics
| NID Storage | 19,000 acre-ft |
| Max Storage | 19,000 acre-ft |
| Normal Storage | 10,270 acre-ft |
| Surface Area | 850 acres |
| Drainage Area | 220 sq mi |
| Max Discharge | 12,400 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Gf&p |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 11/21/2022 |
| Emergency Action Plan | No |
Identifiers
| NID ID | SD00016 |
| Federal ID | SD00016 |
| More Info | State Dam Safety Program |