Big Dan Hole Pond Dam
Big Dan Hole Pond Dam is a concrete dam located in Carroll County, New Hampshire, built in 1910. It carries a Significant hazard potential classification and has a fair condition assessment.
About Big Dan Hole Pond Dam
The primary purpose of Big Dan Hole Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town Of Ossipee (local government). It impounds the Dan Hole River near Ossipee.
The dam stands 13 feet tall and stretches 114 feet across, creates a reservoir covering 443 acres, has a maximum storage capacity of 23,050 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1910, the structure is over a century 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 09/26/2022.
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Location
| State | New Hampshire |
| County | Carroll |
| Nearest City | Ossipee |
| River/Stream | Dan Hole River |
| Coordinates | 43.73250, -71.21020 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 114 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 23,050 acre-ft |
| Max Storage | 23,050 acre-ft |
| Normal Storage | 22,392 acre-ft |
| Surface Area | 443 acres |
| Drainage Area | 5 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | TOWN OF OSSIPEE |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 09/26/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00376 |
| Federal ID | NH00376 |
| More Info | State Dam Safety Program |