Upper Naukeag Lake Dam
Upper Naukeag Lake Dam is an earth dam located in Worcester County, Massachusetts, built in 1875. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Upper Naukeag Lake Dam
The primary purpose of Upper Naukeag Lake 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 Ashburnham (local government). It impounds the Tributary To Millers River near Ashburnham.
The dam stands 8 feet tall and stretches 300 feet across, creates a reservoir covering 300 acres, has a maximum storage capacity of 1,250 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1875, the structure is one of the older dams in the region, with over a century and a half of service.
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. The most recent inspection on record was 04/22/2022.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Massachusetts |
| County | Worcester |
| Nearest City | Ashburnham |
| River/Stream | Tributary To Millers River |
| Coordinates | 42.65821, -71.93662 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Length | 300 ft |
| Year Completed | 1875 (151 years old) |
Storage & Hydraulics
| NID Storage | 1,250 acre-ft |
| Max Storage | 1,250 acre-ft |
| Normal Storage | 650 acre-ft |
| Surface Area | 300 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Town of Ashburnham |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/22/2022 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MA00003 |
| Federal ID | MA00003 |
| More Info | State Dam Safety Program |