Thompson Lake Dam
Thompson Lake Dam is an earth dam located in Mahoning County, Ohio. 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 Kenneth Cooper (private). It impounds the Tributary To Andersons Run near Youngstown.
The dam stands 14 feet tall and stretches 225 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 25 acre-feet, and collects water from a drainage area of 0 square miles.
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. The most recent inspection on record was 11/10/2021.
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Location
| State | Ohio |
| County | Mahoning |
| Nearest City | Youngstown |
| River/Stream | Tributary To Andersons Run |
| Coordinates | 41.06111, -80.73917 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 225 ft |
Storage & Hydraulics
| NID Storage | 25 acre-ft |
| Max Storage | 25 acre-ft |
| Normal Storage | 11 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 582 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Kenneth Cooper |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 11/10/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | OH03163 |
| Federal ID | OH03163 |
| More Info | State Dam Safety Program |