Hidden Haven Lake Dam is an earth dam located in Guernsey County, Ohio, built in 1961. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 44 ft44 ft tall and 365 ft long, taller than 89% 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 Hidden Haven Lake Dam
The primary purpose of Hidden Haven Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Miller Family Farm LLC (private). It impounds the Tributary to Millers Fork near Freeport.
The dam stands 44 feet tall and stretches 365 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 265 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1961, 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 04/22/2025.
At 44 feet, this dam is taller than 89% of dams nationwide.
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Location
| State | Ohio |
| County | Guernsey |
| Nearest City | Freeport |
| River/Stream | Tributary to Millers Fork |
| Coordinates | 40.12917, -81.30111 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 44 ft |
| Dam Height | 44 ft |
| Dam Length | 365 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 265 acre-ft |
| Max Storage | 265 acre-ft |
| Normal Storage | 119 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,746 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Miller Family Farm LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 04/22/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | OH00047 |
| Federal ID | OH00047 |
| More Info | State Dam Safety Program |