Aspetuck Reservoir Dam
Aspetuck Reservoir Dam is an earth dam located in Fairfield County, Connecticut, built in 1913. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Aspetuck Reservoir Dam
The primary purpose of Aspetuck 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 Aquarion Water Company Of Connecticut (public utility). It impounds the Aspetuck River near Westport.
The dam stands 11 feet tall and stretches 1,180 feet across, creates a reservoir covering 63 acres, has a maximum storage capacity of 413 acre-feet, and collects water from a drainage area of 17 square miles. Completed in 1913, 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 05/16/2024.
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Location
| State | Connecticut |
| County | Fairfield |
| Nearest City | Westport |
| River/Stream | Aspetuck River |
| Coordinates | 41.23566, -73.31887 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 1,180 ft |
| Year Completed | 1913 (113 years old) |
Storage & Hydraulics
| NID Storage | 413 acre-ft |
| Max Storage | 413 acre-ft |
| Normal Storage | 202 acre-ft |
| Surface Area | 63 acres |
| Drainage Area | 17 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Aquarion Water Company of Connecticut |
| Owner Type | Public Utility |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/16/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00021 |
| Federal ID | CT00021 |
| More Info | State Dam Safety Program |