Timberlake No. 1 Dam is an earth dam located in Franklin County, Ohio. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 48 ft48 ft tall and 300 ft long, taller than 92% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Timberlake No. 1 Dam
The primary purpose of Timberlake 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 Timber Lake Homeowners Association (private). It impounds the Tributary to Hellbranch Run near Harrisburg.
The dam stands 48 feet tall and stretches 300 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 172 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 11/05/2020.
At 48 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Ohio |
| County | Franklin |
| Nearest City | Harrisburg |
| River/Stream | Tributary to Hellbranch Run |
| Coordinates | 39.82972, -83.15778 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 48 ft |
| Dam Height | 48 ft |
| Dam Length | 300 ft |
Storage & Hydraulics
| NID Storage | 172 acre-ft |
| Max Storage | 172 acre-ft |
| Normal Storage | 108 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 726 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Timber Lake Homeowners Association |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/05/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | OH00743 |
| Federal ID | OH00743 |
| More Info | State Dam Safety Program |