Norumbega Reservoir Dike No. 2
Norumbega Reservoir Dike No. 2 is an earth dam located in Middlesex County, Massachusetts, built in 1940. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Norumbega Reservoir Dike No. 2
The primary purpose of Norumbega Reservoir Dike No. 2 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 Ma Department Of Conservation & Recreation (state). It impounds the Seaverns Brook near Weston.
The dam stands 34 feet tall and stretches 325 feet across, creates a reservoir covering 38 acres, has a maximum storage capacity of 500 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1940, the structure is well-established, with more than 75 years 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. An emergency action plan is in place for this dam. The most recent inspection on record was 11/03/2022.
At 34 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Massachusetts |
| County | Middlesex |
| Nearest City | Weston |
| River/Stream | Seaverns Brook |
| Coordinates | 42.33240, -71.29712 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Length | 325 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 500 acre-ft |
| Max Storage | 500 acre-ft |
| Normal Storage | 250 acre-ft |
| Surface Area | 38 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 411 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | MA Department of Conservation & Recreation |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/03/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA01208 |
| Federal ID | MA00782S001 |
| More Info | State Dam Safety Program |