Rosette Dam is an earth dam located in Edmunds County, South Dakota, built in 1937. It carries a Low hazard potential classification.
Dam profile
NID height · 17 ft17 ft tall and 500 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 Rosette Dam
The primary purpose of Rosette Dam 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 Trib.
The dam stands 17 feet tall and stretches 500 feet across, creates a reservoir covering 18 acres, has a maximum storage capacity of 283 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1937, 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. The most recent inspection on record was 10/20/2022.
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Location
| State | South Dakota |
| County | Edmunds |
| Nearest City | None |
| River/Stream | Snake Creek Trib |
| Coordinates | 45.55655, -99.03391 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 500 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 283 acre-ft |
| Max Storage | 283 acre-ft |
| Normal Storage | 102 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 2,160 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Gf&p |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/20/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00657 |
| Federal ID | SD00657 |
| More Info | State Dam Safety Program |