Wyassup Lake Dam
Wyassup Lake Dam is an earth dam located in New London County, Connecticut, built in 1920. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Wyassup Lake Dam
The primary purpose of Wyassup 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 Wyassup Brook near Clark Falls.
The dam stands 15 feet tall and stretches 495 feet across, creates a reservoir covering 90 acres, has a maximum storage capacity of 800 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1920, 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 10/02/2020.
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Location
| State | Connecticut |
| County | New London |
| Nearest City | Clark Falls |
| River/Stream | Wyassup Brook |
| Coordinates | 41.48686, -71.86913 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 495 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 800 acre-ft |
| Max Storage | 800 acre-ft |
| Normal Storage | 533 acre-ft |
| Surface Area | 90 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 300 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Connecticut DEEP |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/02/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00570 |
| Federal ID | CT00570 |
| More Info | State Dam Safety Program |