Upper Root Reservoir Dam
Upper Root Reservoir Dam is an earth dam located in Berkshire County, Massachusetts, built in 1960. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Upper Root Reservoir Dam
The primary purpose of Upper Root 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 Town Of Lenox (local government). It impounds the Lenox Mountain Brook near Lenox.
The dam stands 36 feet tall and stretches 830 feet across, has a maximum storage capacity of 380 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1960, 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 04/26/2024.
At 36 feet, this dam is taller than 83% 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 Massachusetts 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 | Massachusetts |
| County | Berkshire |
| Nearest City | Lenox |
| River/Stream | Lenox Mountain Brook |
| Coordinates | 42.37003, -73.32555 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 36 ft |
| Dam Length | 830 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 380 acre-ft |
| Max Storage | 380 acre-ft |
| Normal Storage | 280 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,700 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Town of Lenox |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/26/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00019 |
| Federal ID | MA00019 |
| More Info | State Dam Safety Program |