Pine Island Pond Dam
Pine Island Pond Dam is an earth dam located in Hillsborough, New Hampshire, built in 1896. It carries a Low hazard potential classification and has a fair condition assessment.
About Pine Island Pond Dam
The primary purpose of Pine Island Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Manchester (local government). It impounds the Cohas Brook near Manchester.
The dam stands 19 feet tall and stretches 150 feet across, creates a reservoir covering 35 acres, has a maximum storage capacity of 611 acre-feet, and collects water from a drainage area of 69 square miles. Completed in 1896, 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 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 05/22/2020.
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Location
| State | New Hampshire |
| County | Hillsborough |
| Nearest City | Manchester |
| River/Stream | Cohas Brook |
| Coordinates | 42.93130, -71.45130 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 150 ft |
| Year Completed | 1896 (130 years old) |
Storage & Hydraulics
| NID Storage | 611 acre-ft |
| Max Storage | 611 acre-ft |
| Normal Storage | 164 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 69 sq mi |
| Max Discharge | 5,350 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | CITY OF MANCHESTER |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/22/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00292 |
| Federal ID | NH00292 |
| More Info | State Dam Safety Program |