Thompson Lake Dam
Thompson Lake Dam is an earth dam located in Ashland County, Ohio, built in 1972. It carries a Significant hazard potential classification and has a poor condition assessment.
About Thompson Lake Dam
The primary purpose of Thompson Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mohican Campground, Llc (private). It impounds the Tributary To Black Fork Mohican River - Offstream near Greer.
The dam stands 16 feet tall and stretches 545 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 33 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1972, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 10/23/2024.
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Location
| State | Ohio |
| County | Ashland |
| Nearest City | Greer |
| River/Stream | Tributary To Black Fork Mohican River - Offstream |
| Coordinates | 40.61778, -82.25667 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 545 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 33 acre-ft |
| Max Storage | 33 acre-ft |
| Normal Storage | 25 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 9 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Mohican Campground, LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 10/23/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OH01170 |
| Federal ID | OH01170 |
| More Info | State Dam Safety Program |