Pearl Lake Dam
Pearl Lake Dam is a concrete dam located in Grafton County, New Hampshire, built in 1930. It carries a Low hazard potential classification and has a poor condition assessment.
About Pearl Lake Dam
The primary purpose of Pearl Lake 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 Lisbon (local government). It impounds the Pearl Lake near Lisbon.
The dam stands 10 feet tall and stretches 70 feet across, creates a reservoir covering 62 acres, has a maximum storage capacity of 552 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1930, the structure is well-established, with more than 75 years of service.
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 10/05/2017.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Lisbon |
| River/Stream | Pearl Lake |
| Coordinates | 44.20300, -71.87220 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 70 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 552 acre-ft |
| Max Storage | 552 acre-ft |
| Normal Storage | 72 acre-ft |
| Surface Area | 62 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 1,076 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | TOWN OF LISBON |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 10/05/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00573 |
| Federal ID | NH00573 |
| More Info | State Dam Safety Program |