Nepaug Dam, located in Collinsville, Connecticut, stands as a vital structure for water supply purposes, serving as a key reservoir along the Nepaug River.
Wind
Humidity
Built in 1918, this concrete dam boasts a height of 113 feet and a length of 650 feet, with a storage capacity of 40,540 acre-feet and a drainage area of 31.9 square miles. The dam plays a crucial role in managing water resources in the region, with a normal storage capacity of 29,300 acre-feet and a maximum discharge of 7,200 cubic feet per second.
With its high hazard potential and satisfactory condition assessment, Nepaug Dam remains under state regulation and inspection by the Department of Energy and Environmental Protection (DEEP) in Connecticut. The dam features an uncontrolled spillway, valve outlet gates, and is primarily constructed on rock foundations. Despite its age, the dam continues to meet regulatory guidelines, with a moderate risk assessment rating of 3. The associated structures, CT00370S02 and CT00370S03, further support the functionality and resilience of the Nepaug Dam complex, ensuring the efficient management of water resources and mitigating potential risks to the surrounding communities.
Nepaug Dam's historical significance, engineering design, and operational efficiency make it a noteworthy landmark in water resource management within Litchfield County, Connecticut. As a key component of the region's infrastructure, the dam exemplifies the importance of sustainable water supply practices and effective risk management strategies in the face of climate change and evolving environmental challenges. With a strong regulatory framework in place and a commitment to ongoing inspections and maintenance, Nepaug Dam continues to play a crucial role in ensuring the resilience and reliability of water resources for the local community and beyond.
Year Completed |
1918 |
Dam Length |
650 |
Dam Height |
113 |
River Or Stream |
NEPAUG RIVER |
Primary Dam Type |
Concrete |
Surface Area |
850 |
Drainage Area |
31.9 |
Nid Storage |
40540 |
Outlet Gates |
Valve |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
113 |
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
Begins Below The Tailrace Of The Lower Collinsville Dam To The Route 187 Bridge
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