Osage Lake Dam
Osage Lake Dam is an earth dam located in Medina County, Ohio, built in 1955. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Osage Lake Dam
The primary purpose of Osage Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Osage Lake Owners Association (private). It impounds the Tributary To River Styx near River Styx.
The dam stands 28 feet tall and stretches 250 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 146 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1955, the structure is well into its service life at over 50 years old.
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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 05/01/2025.
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Location
| State | Ohio |
| County | Medina |
| Nearest City | River Styx |
| River/Stream | Tributary To River Styx |
| Coordinates | 41.06306, -81.77444 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 250 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 146 acre-ft |
| Max Storage | 146 acre-ft |
| Normal Storage | 81 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 2,124 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Osage Lake Owners Association |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/01/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | OH00617 |
| Federal ID | OH00617 |
| More Info | State Dam Safety Program |