Andover Lake Dam is an earth dam located in Tolland County, Connecticut, built in 1926. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 18 ft18 ft tall and 590 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 Andover Lake Dam
The primary purpose of Andover Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Andover Lake Management Association (private). It impounds the Cheney Brook near Andover.
The dam stands 18 feet tall and stretches 590 feet across, creates a reservoir covering 166 acres, has a maximum storage capacity of 1,460 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1926, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 04/11/2020.
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Location
| State | Connecticut |
| County | Tolland |
| Nearest City | Andover |
| River/Stream | Cheney Brook |
| Coordinates | 41.72434, -72.36053 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 590 ft |
| Year Completed | 1926 (100 years old) |
Storage & Hydraulics
| NID Storage | 1,460 acre-ft |
| Max Storage | 1,460 acre-ft |
| Surface Area | 166 acres |
| Drainage Area | 3 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Andover Lake Management Association |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/11/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00624 |
| Federal ID | CT00624 |
| More Info | State Dam Safety Program |