Wigwam Reservoir Dam
Wigwam Reservoir Dam is a concrete dam located in Litchfield County, Connecticut, built in 1893. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Wigwam Reservoir Dam
The primary purpose of Wigwam 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 City Of Waterbury (local government). It impounds the Branch Brook near Watertown.
The dam stands 75 feet tall and stretches 600 feet across, creates a reservoir covering 114 acres, has a maximum storage capacity of 2,946 acre-feet, and collects water from a drainage area of 17 square miles. Completed in 1893, 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 10/21/2022.
At 75 feet, this dam is taller than 97% of all dams in the United States.
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Location
| State | Connecticut |
| County | Litchfield |
| Nearest City | Watertown |
| River/Stream | Branch Brook |
| Coordinates | 41.66420, -73.12792 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 75 ft |
| Dam Height | 75 ft |
| Dam Length | 600 ft |
| Year Completed | 1893 (133 years old) |
Storage & Hydraulics
| NID Storage | 2,946 acre-ft |
| Max Storage | 2,946 acre-ft |
| Normal Storage | 2,946 acre-ft |
| Surface Area | 114 acres |
| Drainage Area | 17 sq mi |
| Max Discharge | 13,132 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Waterbury |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/21/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00615 |
| Federal ID | CT00615 |
| More Info | State Dam Safety Program |