Seymour Reservoir #3 Dam is an earth dam located in New Haven County, Connecticut, built in 1910. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 42 ft42 ft tall and 730 ft long, taller than 88% of U.S. dams with a recorded height. 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 Seymour Reservoir #3 Dam
The primary purpose of Seymour 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 Connecticut Deep (state). It impounds the Unnamed near Pine Bridge.
The dam stands 42 feet tall and stretches 730 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 245 acre-feet, and collects water from a drainage area of 0 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 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 11/16/2021.
At 42 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | Connecticut |
| County | New Haven |
| Nearest City | Pine Bridge |
| River/Stream | Unnamed |
| Coordinates | 41.44460, -73.09041 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 730 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 245 acre-ft |
| Max Storage | 245 acre-ft |
| Normal Storage | 206 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 280 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Connecticut Deep |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 11/16/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00323 |
| Federal ID | CT00323 |
| More Info | State Dam Safety Program |