Weston is a timber crib dam located in Coos County, New Hampshire, built in 1987. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 20 ft20 ft tall and 210 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Weston
The primary purpose of Weston 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 Powerhouse Systems (private). It impounds the Upper Ammonoosuc River near Groveton.
The dam stands 20 feet tall and stretches 210 feet across, creates a reservoir covering 30 acres, has a maximum storage capacity of 275 acre-feet, and collects water from a drainage area of 263 square miles. Completed in 1987, the structure is 39 years 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 07/15/2022.
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Location
| State | New Hampshire |
| County | Coos |
| Nearest City | Groveton |
| River/Stream | Upper Ammonoosuc River |
| Coordinates | 44.59320, -71.51530 |
Physical Characteristics
| Dam Type | Timber Crib |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 210 ft |
| Year Completed | 1987 (39 years old) |
Storage & Hydraulics
| NID Storage | 275 acre-ft |
| Max Storage | 275 acre-ft |
| Normal Storage | 275 acre-ft |
| Surface Area | 30 acres |
| Drainage Area | 263 sq mi |
| Max Discharge | 14,250 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Powerhouse Systems |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/15/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00369 |
| Federal ID | NH00369 |
| More Info | State Dam Safety Program |