Assabet River Dam
Assabet River Dam is an earth dam located in Worcester County, Massachusetts. It carries a Significant hazard potential classification and has a fair condition assessment.
About Assabet River Dam
Assabet River Dam is a dam in Worcester, Massachusetts. The dam is owned by Montrose Northborough, Llc (private). It impounds the Assabet River near Northborough.
The dam stands 11 feet tall and stretches 170 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 20 acre-feet, and collects water from a drainage area of 30 square miles.
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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 05/06/2021.
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Location
| State | Massachusetts |
| County | Worcester |
| Nearest City | Northborough |
| River/Stream | Assabet River |
| Coordinates | 42.32964, -71.63023 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Length | 170 ft |
Storage & Hydraulics
| NID Storage | 20 acre-ft |
| Max Storage | 20 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 30 sq mi |
| Max Discharge | 3,307 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Montrose Northborough, LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 05/06/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00995 |
| Federal ID | MA00995 |
| More Info | State Dam Safety Program |