Thor Lake Dam is an earth dam located in Preble County, Ohio, built in 1970. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 39 ft39 ft tall and 720 ft long, taller than 85% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Thor Lake Dam
The primary purpose of Thor Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lakengren Property Owners Assn. (private). It impounds the Tributary to Paint Creek near Muttonville.
The dam stands 39 feet tall and stretches 720 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 170 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1970, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 05/20/2021.
At 39 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | Ohio |
| County | Preble |
| Nearest City | Muttonville |
| River/Stream | Tributary to Paint Creek |
| Coordinates | 39.68333, -84.69389 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 720 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 170 acre-ft |
| Max Storage | 170 acre-ft |
| Normal Storage | 97 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,386 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Lakengren Property Owners Assn. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/20/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | OH00157 |
| Federal ID | OH00157 |
| More Info | State Dam Safety Program |