Seymour Reservoir #4 Dam
Seymour Reservoir #4 Dam is an earth dam located in New Haven County, Connecticut, built in 1951. It carries a Significant hazard potential classification and has a poor condition assessment.
About Seymour Reservoir #4 Dam
The primary purpose of Seymour Reservoir #4 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 28 feet tall and stretches 425 feet across, creates a reservoir covering 40 acres, has a maximum storage capacity of 725 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1951, the structure is well into its service life at over 50 years 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 03/11/2021.
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Location
| State | Connecticut |
| County | New Haven |
| Nearest City | Pine Bridge |
| River/Stream | Unnamed |
| Coordinates | 41.44933, -73.09003 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 425 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 725 acre-ft |
| Max Storage | 725 acre-ft |
| Normal Storage | 558 acre-ft |
| Surface Area | 40 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 260 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Connecticut DEEP |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 03/11/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00325 |
| Federal ID | CT00325 |
| More Info | State Dam Safety Program |