Pembroke is a masonry dam located in Merrimack County, New Hampshire, built in 1891. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 26 ft26 ft tall and 108 ft long, taller than 55% 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 concrete gravity section and the water level is illustrative.
About Pembroke
The primary purpose of Pembroke is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Pembroke Hydro Associates (private). It impounds the Suncook River near Pembroke.
The dam stands 26 feet tall and stretches 108 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 34 acre-feet, and collects water from a drainage area of 259 square miles. Completed in 1891, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 05/25/2022.
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Location
| State | New Hampshire |
| County | Merrimack |
| Nearest City | Pembroke |
| River/Stream | Suncook River |
| Coordinates | 43.13047, -71.45378 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 108 ft |
| Year Completed | 1891 (135 years old) |
Storage & Hydraulics
| NID Storage | 34 acre-ft |
| Max Storage | 34 acre-ft |
| Normal Storage | 34 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 259 sq mi |
| Max Discharge | 1,848 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Pembroke Hydro Associates |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/25/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00377 |
| Federal ID | NH00377 |
| More Info | State Dam Safety Program |