Cold Harbor Brook Dam
Cold Harbor Brook Dam is an earth dam located in Worcester County, Massachusetts, built in 1962. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Cold Harbor Brook Dam
The primary purpose of Cold Harbor Brook Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Ma Department Of Conservation & Recreation (state). It impounds the Cold Harbor Brook near Northborough.
The dam stands 22 feet tall and stretches 1,175 feet across, has a maximum storage capacity of 2,195 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1962, 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 05/22/2024.
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 | Worcester |
| Nearest City | Northborough |
| River/Stream | Cold Harbor Brook |
| Coordinates | 42.30939, -71.66347 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Length | 1,175 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 2,195 acre-ft |
| Max Storage | 2,195 acre-ft |
| Drainage Area | 6 sq mi |
| Max Discharge | 180 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | MA Department of Conservation & Recreation |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/22/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00996 |
| Federal ID | MA00996 |
| More Info | State Dam Safety Program |