Hewitt Pond Dam Reservoir Report
Last Updated: December 20, 2025
Hewitt Pond Dam, located in Raynham, Massachusetts, is a local government-owned structure primarily used for recreation purposes.
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Summary
This Earth-type dam, with a core type of buttress, stands at a height of 7 feet and has a hydraulic height of 4.5 feet. The dam's maximum storage capacity is 69.99 acre-feet, with a normal storage level of 50 acre-feet. It is regulated and permitted by the Department of Conservation and Recreation in Massachusetts, ensuring proper inspection, enforcement, and maintenance to mitigate risks associated with its poor condition assessment and low hazard potential.
Despite its moderate risk rating of 3, the dam has an uncontrolled spillway type with a width of 0 feet. The last inspection in June 2011 revealed its poor condition, prompting the need for more frequent assessments every 10 years. While the dam has not been modified in recent years and lacks associated structures, it remains a focal point for recreational activities in the area. As water resource and climate enthusiasts, it is crucial to monitor the ongoing management and maintenance of Hewitt Pond Dam to ensure its safety and sustainability for both human enjoyment and environmental conservation in Bristol County, Massachusetts.
Dam Height |
7 |
Primary Dam Type |
Earth |
Hydraulic Height |
4.5 |
Nid Storage |
69.99 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
7 |
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.
Hewitt Pond Dam
Lakeside Drive 62-136, Bridgewater