Rockwood Lake North Street Dike
Rockwood Lake North Street Dike is an earth dam located in Fairfield County, Connecticut, built in 1893. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Rockwood Lake North Street Dike
The primary purpose of Rockwood Lake North Street Dike 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 Aquarion Water Company Of Connecticut (public utility). It impounds the Horseneck Brook near Greenwich.
The dam stands 12 feet tall and stretches 550 feet across, creates a reservoir covering 110 acres, has a maximum storage capacity of 2,112 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1893, 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 05/16/2024.
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 | Fairfield |
| Nearest City | Greenwich |
| River/Stream | Horseneck Brook |
| Coordinates | 41.09772, -73.63320 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 550 ft |
| Year Completed | 1893 (133 years old) |
Storage & Hydraulics
| NID Storage | 2,112 acre-ft |
| Max Storage | 2,112 acre-ft |
| Normal Storage | 1,550 acre-ft |
| Surface Area | 110 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Aquarion Water Company of Connecticut |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/16/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00046 |
| Federal ID | CT00046S02 |
| More Info | State Dam Safety Program |