Straitsville Reservoir Dam
Straitsville Reservoir Dam is an earth dam located in New Haven County, Connecticut, built in 1900. It carries a Significant hazard potential classification and has a fair condition assessment.
About Straitsville Reservoir Dam
The primary purpose of Straitsville 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 Connecticut Water Company (public utility). It impounds the Marks Brook near Naugatuck.
The dam stands 25 feet tall and stretches 360 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 25 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1900, 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 12/12/2024.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Connecticut |
| County | New Haven |
| Nearest City | Naugatuck |
| River/Stream | Marks Brook |
| Coordinates | 41.47360, -73.00266 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 360 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 25 acre-ft |
| Max Storage | 25 acre-ft |
| Normal Storage | 25 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 528 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Connecticut Water Company |
| Owner Type | Public Utility |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 12/12/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT01695 |
| Federal ID | CT01695 |
| More Info | State Dam Safety Program |