Killingworth Reservoir Dam
Killingworth Reservoir Dam is an earth dam located in Middlesex County, Connecticut, built in 1895. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Killingworth Reservoir Dam
The primary purpose of Killingworth 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 Blueberry Brook near Kelseytown.
The dam stands 46 feet tall and stretches 750 feet across, creates a reservoir covering 109 acres, has a maximum storage capacity of 1,200 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1895, the structure is over a century old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. 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 10/20/2022.
At 46 feet, this dam is taller than 91% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Connecticut dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Connecticut |
| County | Middlesex |
| Nearest City | Kelseytown |
| River/Stream | Blueberry Brook |
| Coordinates | 41.35869, -72.53601 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 46 ft |
| Dam Height | 41 ft |
| Dam Length | 750 ft |
| Year Completed | 1895 (131 years old) |
Storage & Hydraulics
| NID Storage | 1,200 acre-ft |
| Max Storage | 1,200 acre-ft |
| Normal Storage | 1,084 acre-ft |
| Surface Area | 109 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Connecticut Water Company |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/20/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00401 |
| Federal ID | CT00401 |
| More Info | State Dam Safety Program |