| Quaddick Reservoir | |
|---|---|
| Location | Windham County, Connecticut, USA |
| Coordinates | 41°57′23″N 71°49′01″W / 41.956360°N 71.816834°WCoordinates: 41°57′23″N 71°49′01″W / 41.956360°N 71.816834°W |
| Type | Reservoir |
| Primary inflows | Five Mile River, Robbins Brook, Poor Farm Brook, Blackmore Brook |
| Primary outflows | Five Mile River |
| Catchment area | 35 square miles (91 km2) |
| Basin countries | United States |
| Surface area | 408 acres (1.65 km2) |
| Surface elevation | 403 ft (85 m) |
| Islands | Green, McNerney's, Brandy Hill |
| Sections/sub-basins | Lower, Middle and Upper |
Quaddick Reservoir is a reservoir in Windham County, Connecticut, USA, in the town of Thompson. The reservoir originated with the completion of a dam on the Five Mile River in 1865. The reservoir has three sections: Lower (124 acres), Middle (203 acres), and Upper (81 acres).Quaddick State Park sits on the eastern shore of the Middle Reservoir.