The Collins Company Upper Pond Dam, located in Unionville, Connecticut, is a historic masonry dam completed in 1837 on the Farmington River.
Wind
Humidity
With a height of 32 feet and a length of 660 feet, this dam serves primarily for recreation purposes, providing a surface area of 140 acres and a storage capacity of 1400 acre-feet. The dam has a significant hazard potential but is currently in satisfactory condition according to a 2015 assessment.
Despite not being state-regulated or permitted, the Collins Company Upper Pond Dam plays a crucial role in the local community, offering opportunities for recreation and enjoyment. With an uncontrolled spillway and a maximum discharge of 55,000 cubic feet per second, the dam presents a moderate risk level, prompting the need for an Emergency Action Plan (EAP) to ensure public safety in case of emergencies. Being a part of the rich history of the area, this dam stands as a testament to the engineering achievements of the past while serving as a reminder of the importance of proper maintenance and risk management in the face of changing climate conditions.
Year Completed |
1837 |
Dam Length |
660 |
Dam Height |
32 |
River Or Stream |
FARMINGTON RIVER |
Primary Dam Type |
Masonry |
Surface Area |
140 |
Drainage Area |
359 |
Nid Storage |
1400 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Significant |
Nid Height |
32 |
Begins Below The Tailrace Of The Lower Collinsville Dam To The Route 187 Bridge
The Confluence With The Nepaug River To A Point 0.2 Miles Below The Lower Collinsville Dam Tailrace
New Hartford/Canton Town Line To The Confluence With The Nepaug River
The Hartland Headwaters To The Confluence With The Salmon Brook Main Stem
The Confluence Of The East And West Branches To The Confluence With The Farmington River In East Granby