Leeth Lake Dam is an earth dam located in Ross County, Ohio, built in 1965. It carries a Significant hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 42 ft42 ft tall and 550 ft long, taller than 88% 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 Leeth Lake Dam
The primary purpose of Leeth Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Melanie Miller (private). It impounds the Tributary to Upper Twin Creek near Bourneville.
The dam stands 42 feet tall and stretches 550 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 98 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1965, 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. The most recent inspection on record was 06/06/2023.
At 42 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | Ohio |
| County | Ross |
| Nearest City | Bourneville |
| River/Stream | Tributary to Upper Twin Creek |
| Coordinates | 39.29417, -83.28472 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 550 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 98 acre-ft |
| Max Storage | 98 acre-ft |
| Normal Storage | 67 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 36 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Melanie Miller |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 06/06/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | OH00957 |
| Federal ID | OH00957 |
| More Info | State Dam Safety Program |