Lake Pocotopaug Dam
Lake Pocotopaug Dam is an earth dam located in Middlesex County, Connecticut, built in 1953. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Lake Pocotopaug Dam
The primary purpose of Lake Pocotopaug Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Pocotopaug Water Power Company (private). It impounds the Pocotopaug Creek/four Acre Pond near East Hampton.
The dam stands 6 feet tall and stretches 115 feet across, creates a reservoir covering 512 acres, has a maximum storage capacity of 1,320 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1953, the structure is well into its service life at over 50 years 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. The most recent inspection on record was 07/25/2019.
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Location
| State | Connecticut |
| County | Middlesex |
| Nearest City | East Hampton |
| River/Stream | Pocotopaug Creek/four Acre Pond |
| Coordinates | 41.58532, -72.50157 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 6 ft |
| Dam Height | 6 ft |
| Dam Length | 115 ft |
| Year Completed | 1953 (73 years old) |
Storage & Hydraulics
| NID Storage | 1,320 acre-ft |
| Max Storage | 1,320 acre-ft |
| Normal Storage | 1,320 acre-ft |
| Surface Area | 512 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 403 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Pocotopaug Water Power Company |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/25/2019 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CT00362 |
| Federal ID | CT00362 |
| More Info | State Dam Safety Program |