Poquonock Lake Dam
Key Takeaway
Poquonock Lake Dam is classified as low hazard in Connecticut. Its primary use is water supply.
Physical Details
| Dam Height | 10 ft (taller than 29.6% in CT) |
| Dam Length | 4 ft |
| Dam Type | Earth |
| Normal Storage | 242 acre-ft |
| Surface Area | 67 acres |
| Drainage Area | 2 sq mi |
| NID ID | CT00956 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
City of Groton
Local Government
Nearby Dams
Poheganut Reservoir Dam
New London, CT
Significant Hazard 16 ftPoquonnock Reservoir Dam
New London, CT
High Hazard 18 ftLedyard Reservoir South Dam
New London, CT
Significant Hazard 10 ftYmca Pond Dam
New London, CT
Low Hazard 7 ftMorgan Pond Dam
New London, CT
Significant Hazard 45 ftSmith Pond Dam
New London, CT
Significant Hazard 13 ftPerry Pond Dam
New London, CT
Significant Hazard 5 ftBrandagee Lake Dam
New London, CT
Significant Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Poquonock Lake Dam?
Poquonock Lake Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Poquonock Lake Dam?
Poquonock Lake Dam is owned by City of Groton (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
What is the primary purpose of Poquonock Lake Dam?
Poquonock Lake Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Poquonock Lake Dam?
Poquonock Lake Dam has a dam height of 10 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.