Upper Shepaug Dam
Upper Shepaug Dam is an earth dam located in Litchfield County, Connecticut, built in 1965. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Upper Shepaug Dam
The primary purpose of Upper Shepaug 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 West Br Shepaug R near Woodville.
The dam stands 90 feet tall and stretches 1,050 feet across, creates a reservoir covering 430 acres, has a maximum storage capacity of 13,942 acre-feet, and collects water from a drainage area of 10 square miles. Completed in 1965, the structure is well into its service life at over 50 years 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 06/11/2024.
At 90 feet, this dam is taller than 98% of all dams in the United States.
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 | Litchfield |
| Nearest City | Woodville |
| River/Stream | West Br Shepaug R |
| Coordinates | 41.74386, -73.30048 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 90 ft |
| Dam Height | 90 ft |
| Dam Length | 1,050 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 14,740 acre-ft |
| Max Storage | 13,942 acre-ft |
| Normal Storage | 14,740 acre-ft |
| Surface Area | 430 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 18,200 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Waterbury |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/11/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00634 |
| Federal ID | CT00634 |
| More Info | State Dam Safety Program |