Arnett Lake No. 1 Dam is an earth dam located in Warren County, Ohio, built in 1967. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 26 ft26 ft tall and 300 ft long, taller than 55% 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 Arnett Lake No. 1 Dam
The primary purpose of Arnett Lake No. 1 Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by James Arnett (private). It impounds the Tributary to North Fork near South Lebanon.
The dam stands 26 feet tall and stretches 300 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 57 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1967, 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. The most recent inspection on record was 05/07/2024.
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Location
| State | Ohio |
| County | Warren |
| Nearest City | South Lebanon |
| River/Stream | Tributary to North Fork |
| Coordinates | 39.54917, -84.13333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 300 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 57 acre-ft |
| Max Storage | 57 acre-ft |
| Normal Storage | 29 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 591 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | James Arnett |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 05/07/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | OH00560 |
| Federal ID | OH00560 |
| More Info | State Dam Safety Program |