Maltby #2 Dam
Maltby #2 Dam is an earth dam located in New Haven County, Connecticut, built in 1862. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Maltby #2 Dam
The primary purpose of Maltby #2 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 Maltby Lake No. 1 near West Haven.
The dam stands 45 feet tall and stretches 800 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 175 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1862, the structure is one of the older dams in the region, with over a century and a half of service.
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 11/01/2022.
At 45 feet, this dam is taller than 91% of dams nationwide.
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Location
| State | Connecticut |
| County | New Haven |
| Nearest City | West Haven |
| River/Stream | Maltby Lake No. 1 |
| Coordinates | 41.30691, -72.97936 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 45 ft |
| Dam Height | 35 ft |
| Dam Length | 800 ft |
| Year Completed | 1862 (164 years old) |
Storage & Hydraulics
| NID Storage | 175 acre-ft |
| Max Storage | 175 acre-ft |
| Normal Storage | 175 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 172 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | South Central CT RWA |
| Owner Type | Public Utility |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/01/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00112 |
| Federal ID | CT00112 |
| More Info | State Dam Safety Program |