Brunswick
Brunswick is a masonry dam located in Windham County, Connecticut, built in 1891. It carries a Low hazard potential classification and has a fair condition assessment.
About Brunswick
The primary purpose of Brunswick 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 Glen Falls Hydro, Llc (private). It impounds the Moosup River near Moosup.
The dam stands 19 feet tall and stretches 160 feet across, creates a reservoir covering 43 acres, has a maximum storage capacity of 215 acre-feet, and collects water from a drainage area of 77 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 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 11/17/2025.
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Location
| State | Connecticut |
| County | Windham |
| Nearest City | Moosup |
| River/Stream | Moosup River |
| Coordinates | 41.71740, -71.86130 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 160 ft |
| Year Completed | 1891 (135 years old) |
Storage & Hydraulics
| NID Storage | 215 acre-ft |
| Max Storage | 215 acre-ft |
| Normal Storage | 215 acre-ft |
| Surface Area | 43 acres |
| Drainage Area | 77 sq mi |
| Max Discharge | 3,960 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Glen Falls Hydro, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 11/17/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CT00579 |
| Federal ID | CT00579 |
| More Info | State Dam Safety Program |