Sanback Dam is a gravity dam located in Ogemaw County, Michigan, built in 1857. It carries a Significant hazard potential classification and has a unsatisfactory condition assessment.
Dam profile
NID height · 24 ft24 ft tall and 600 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Sanback Dam
Sanback Dam is a dam in Ogemaw, Michigan. The dam is owned by City of Rose City (local government). It impounds the Beach Creek near Rose City.
The dam stands 24 feet tall and stretches 600 feet across, creates a reservoir covering 5 acres, and has a maximum storage capacity of 60 acre-feet. Completed in 1857, the structure is one of the older dams in the region, with over a century and a half 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. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. The most recent inspection on record was 10/29/2020.
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Location
| State | Michigan |
| County | Ogemaw |
| Nearest City | Rose City |
| River/Stream | Beach Creek |
| Coordinates | 44.42500, -84.11833 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 600 ft |
| Year Completed | 1857 (169 years old) |
Storage & Hydraulics
| NID Storage | 60 acre-ft |
| Max Storage | 60 acre-ft |
| Normal Storage | 40 acre-ft |
| Surface Area | 5 acres |
| Max Discharge | 770 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | City of Rose City |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 10/29/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MI00290 |
| Federal ID | MI00290 |
| More Info | State Dam Safety Program |