Amston Lake Dam is an earth dam located in Tolland County, Connecticut, built in 1910. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 400 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 Amston Lake Dam
The primary purpose of Amston Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Amston Lake District (private). It impounds the Raymond Brook Trib near Amston.
The dam stands 10 feet tall and stretches 400 feet across, creates a reservoir covering 187 acres, has a maximum storage capacity of 1,200 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1910, 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 11/11/2021.
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Location
| State | Connecticut |
| County | Tolland |
| Nearest City | Amston |
| River/Stream | Raymond Brook Trib |
| Coordinates | 41.62710, -72.33447 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 400 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 1,200 acre-ft |
| Max Storage | 1,200 acre-ft |
| Normal Storage | 740 acre-ft |
| Surface Area | 187 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 180 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Amston Lake District |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/11/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00544 |
| Federal ID | CT00544 |
| More Info | State Dam Safety Program |