Assabet River Dam Reservoir Report
Nearby: Bartlett Pond Dam Tyler Dam
Last Updated: December 14, 2025
The Assabet River Dam, located in Northborough, Massachusetts, is a significant structure with a primary purpose of water supply.
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Summary
The dam, made of concrete and rockfill with a buttress core type, stands at a height of 11 feet and spans 170 feet in length. With a storage capacity of 20 acre-feet and a drainage area of 30 square miles, the dam plays a crucial role in managing water resources in the region.
Managed by the Department of Conservation and Recreation, the Assabet River Dam is state-regulated and undergoes regular inspections to ensure its structural integrity. Despite being classified as having a significant hazard potential, the dam's condition assessment remains satisfactory. The surrounding area boasts a surface area of 3.04 acres, providing a serene environment for water resource and climate enthusiasts to explore and appreciate the vital role that the dam plays in maintaining the ecological balance of the region.
As climate change continues to impact water resources, the Assabet River Dam stands as a testament to the importance of sustainable water management practices. With a moderate risk assessment rating, efforts are being made to implement risk management measures to mitigate potential hazards and ensure the safety and functionality of the dam for years to come. The Assabet River Dam serves as a key infrastructure for water supply and environmental conservation, highlighting the intersection of human development and nature in a dynamic and ever-changing climate.
Dam Length |
170 |
Dam Height |
11 |
River Or Stream |
ASSABET RIVER |
Primary Dam Type |
Concrete |
Surface Area |
3.04 |
Hydraulic Height |
8 |
Drainage Area |
30 |
Nid Storage |
20 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
11 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Assabet River Dam
Bartlett Street 152, Northborough