Billings Lake Dam
Billings Lake Dam is an earth dam located in New London County, Connecticut, built in 1900. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Billings Lake Dam
The primary purpose of Billings Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Connecticut Deep (state). It impounds the Billings Brook near North Stonington.
The dam stands 12 feet tall and stretches 75 feet across, creates a reservoir covering 105 acres, has a maximum storage capacity of 577 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1900, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 06/06/2023.
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Location
| State | Connecticut |
| County | New London |
| Nearest City | North Stonington |
| River/Stream | Billings Brook |
| Coordinates | 41.51227, -71.87592 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 75 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 577 acre-ft |
| Max Storage | 577 acre-ft |
| Normal Storage | 577 acre-ft |
| Surface Area | 105 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 80 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Connecticut DEEP |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/06/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00571 |
| Federal ID | CT00571 |
| More Info | State Dam Safety Program |