Middle Reservoir Dam
Middle Reservoir Dam is a masonry dam located in New Haven County, Connecticut, built in 1890. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Middle Reservoir Dam
The primary purpose of Middle Reservoir 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 South Central Ct Rwa (public utility). It impounds the Beaver Brook near Ansonia.
The dam stands 35 feet tall and stretches 290 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 36 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1890, 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 10/27/2022.
At 35 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | Connecticut |
| County | New Haven |
| Nearest City | Ansonia |
| River/Stream | Beaver Brook |
| Coordinates | 41.36583, -73.06066 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 290 ft |
| Year Completed | 1890 (136 years old) |
Storage & Hydraulics
| NID Storage | 36 acre-ft |
| Max Storage | 36 acre-ft |
| Normal Storage | 33 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 132 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | South Central CT RWA |
| Owner Type | Public Utility |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/27/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00590 |
| Federal ID | CT00590 |
| More Info | State Dam Safety Program |