Ossipee Lake Dam Headworks Dam
Ossipee Lake Dam Headworks Dam is a concrete dam located in Carroll County, New Hampshire, built in 1919. It carries a Low hazard potential classification and has a poor condition assessment.
About Ossipee Lake Dam Headworks Dam
The primary purpose of Ossipee Lake Dam Headworks Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nh Des Water Division (state). It impounds the Ossipee River near Effingham.
The dam stands 12 feet tall and stretches 129 feet across, creates a reservoir covering 4,095 acres, has a maximum storage capacity of 47,200 acre-feet, and collects water from a drainage area of 357 square miles. Completed in 1919, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 10/18/2017.
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Location
| State | New Hampshire |
| County | Carroll |
| Nearest City | Effingham |
| River/Stream | Ossipee River |
| Coordinates | 43.79372, -71.06366 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 129 ft |
| Year Completed | 1919 (107 years old) |
Storage & Hydraulics
| NID Storage | 47,200 acre-ft |
| Max Storage | 47,200 acre-ft |
| Normal Storage | 23,300 acre-ft |
| Surface Area | 4,095 acres |
| Drainage Area | 357 sq mi |
| Max Discharge | 2,720 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | NH DES WATER DIVISION |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 10/18/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00328 |
| Federal ID | NH00328 |
| More Info | State Dam Safety Program |