Knoles Pond Dam is an earth dam located in Ross County, Ohio, built in 1965. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 28 ft28 ft tall and 1,116 ft long, taller than 62% 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 Knoles Pond Dam
The primary purpose of Knoles Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Charles Knoles (private). It impounds the Tributary to Indian Creek near Massieville.
The dam stands 28 feet tall and stretches 1,116 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 157 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 11/02/2022.
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Location
| State | Ohio |
| County | Ross |
| Nearest City | Massieville |
| River/Stream | Tributary to Indian Creek |
| Coordinates | 39.25833, -82.98333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 1,116 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 157 acre-ft |
| Max Storage | 157 acre-ft |
| Normal Storage | 57 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 2,400 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Charles Knoles |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 11/02/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OH00773 |
| Federal ID | OH00773 |
| More Info | State Dam Safety Program |