Terryville Reservoir #3 Dam
Terryville Reservoir #3 Dam is an earth dam located in Litchfield County, Connecticut, built in 1920. It carries a Significant hazard potential classification and has a fair condition assessment.
About Terryville Reservoir #3 Dam
The primary purpose of Terryville Reservoir #3 Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Town Of Plymouth (local government). It impounds the Pequabuck River Trib near Plymouth.
The dam stands 20 feet tall and stretches 450 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 51 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 10/01/2021.
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Location
| State | Connecticut |
| County | Litchfield |
| Nearest City | Plymouth |
| River/Stream | Pequabuck River Trib |
| Coordinates | 41.69012, -73.03367 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 450 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 51 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 160 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Town of Plymouth |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 10/01/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00292 |
| Federal ID | CT00292 |
| More Info | State Dam Safety Program |