Hoppin Hill Reservoir Dam Reservoir Report
Last Updated: December 13, 2025
Located in North Attleborough, Massachusetts, the Hoppin Hill Reservoir Dam stands as a vital piece of infrastructure for the region's water supply.
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Summary
Completed in 1910, this earth dam spans 1100 feet and reaches a height of 27 feet, with a primary purpose of water supply. The reservoir created by the dam has a storage capacity of 441 acre-feet and serves as a crucial resource for the surrounding community.
Managed by the Department of Conservation and Recreation, the Hoppin Hill Reservoir Dam is subject to state regulations, inspections, and enforcement to ensure its safety and reliability. With a high hazard potential but a satisfactory condition assessment, the dam poses a moderate risk, prompting regular inspections and emergency action plans to be in place. Despite its age, the dam continues to play a key role in water resource management in Bristol County, Massachusetts.
Surrounded by the tranquil waters of the Seven Mile River, the Hoppin Hill Reservoir Dam is not only a functional structure but also a scenic attraction in the area. With its buttress core design and uncontrolled spillway, the dam exemplifies the intersection of engineering ingenuity and environmental stewardship. For water resource and climate enthusiasts, the Hoppin Hill Reservoir Dam serves as a reminder of the importance of sustainable infrastructure in ensuring the availability of essential resources for generations to come.
Year Completed |
1910 |
Dam Length |
1100 |
Dam Height |
27 |
River Or Stream |
SEVEN MILE RIVER |
Primary Dam Type |
Earth |
Surface Area |
38.7 |
Hydraulic Height |
22 |
Drainage Area |
0.62 |
Nid Storage |
441 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
27 |
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.
Hoppin Hill Reservoir Dam
Falls Pond