Poquonock Lake Dam is an earth dam located in New London County, Connecticut. It carries a Low hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 4 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Poquonock Lake Dam
The primary purpose of Poquonock Lake Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City of Groton (local government). It impounds the Hatching House Brook.
The dam stands 10 feet tall and stretches 4 feet across, creates a reservoir covering 67 acres, has a storage capacity of 242 acre-feet, and collects water from a drainage area of 2 square miles.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Connecticut |
| County | New London |
| River/Stream | Hatching House Brook |
| Coordinates | 41.35765, -72.03452 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 4 ft |
Storage & Hydraulics
| NID Storage | 242 acre-ft |
| Normal Storage | 242 acre-ft |
| Surface Area | 67 acres |
| Drainage Area | 2 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Groton |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | CT00956 |
| Federal ID | CT00956 |
| More Info | State Dam Safety Program |