Middle Bolton Lake Dam
Middle Bolton Lake Dam is an earth dam located in Tolland County, Connecticut, built in 1940. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Middle Bolton Lake Dam
The primary purpose of Middle Bolton 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 Bolton Pond Brook near Vernon.
The dam stands 20 feet tall and stretches 640 feet across, creates a reservoir covering 140 acres, has a maximum storage capacity of 672 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1940, the structure is well-established, with more than 75 years of service.
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 10/15/2021.
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Location
| State | Connecticut |
| County | Tolland |
| Nearest City | Vernon |
| River/Stream | Bolton Pond Brook |
| Coordinates | 41.80780, -72.42947 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 640 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 672 acre-ft |
| Max Storage | 672 acre-ft |
| Normal Storage | 672 acre-ft |
| Surface Area | 140 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 6,764 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Connecticut DEEP |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/15/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CT00668 |
| Federal ID | CT00668 |
| More Info | State Dam Safety Program |