Byre Dam
Byre Dam is an earth dam located in Lyman County, South Dakota, built in 1940. It carries a Significant hazard potential classification.
About Byre Dam
The primary purpose of Byre Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town Of Kennebec (local government). It impounds the Grouse Creek.
The dam stands 27 feet tall and stretches 1,040 feet across, creates a reservoir covering 44 acres, has a maximum storage capacity of 2,288 acre-feet, and collects water from a drainage area of 37 square miles. Completed in 1940, 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 07/20/2023.
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Location
| State | South Dakota |
| County | Lyman |
| Nearest City | None |
| River/Stream | Grouse Creek |
| Coordinates | 43.92840, -99.83221 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 1,040 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 2,288 acre-ft |
| Max Storage | 2,288 acre-ft |
| Normal Storage | 1,188 acre-ft |
| Surface Area | 44 acres |
| Drainage Area | 37 sq mi |
| Max Discharge | 9,500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Town OF Kennebec |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Last Inspection | 07/20/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02170 |
| Federal ID | SD02170 |
| More Info | State Dam Safety Program |