Belden Dam is a masonry dam located in Windham County, Connecticut, built in 1900. It carries a Significant hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 130 ft long. 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 Belden Dam
Belden Dam is a dam in Windham, Connecticut. The dam is owned by 630 Riverside Drive LLC (private). It impounds the French River near Thompson.
The dam stands 10 feet tall and stretches 130 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 77 acre-feet, and collects water from a drainage area of 101 square miles. Completed in 1900, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
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Location
| State | Connecticut |
| County | Windham |
| Nearest City | Thompson |
| River/Stream | French River |
| Coordinates | 41.96929, -71.89395 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 130 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 77 acre-ft |
| Max Storage | 77 acre-ft |
| Normal Storage | 77 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 101 sq mi |
| Max Discharge | 3,024 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | 630 Riverside Drive LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | CT00187 |
| Federal ID | CT00187 |
| More Info | State Dam Safety Program |