Terry Brook Reservoir Dam Reservoir Report
Nearby: Tisdale Pond Dam Monument Pond Dam
Last Updated: December 20, 2025
Located in Freetown, Massachusetts, the Terry Brook Reservoir Dam is a rockfill structure standing at 26 feet high with a hydraulic height of 23.5 feet.
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Summary
This recreational dam holds a storage capacity of 150 acre-feet and covers a surface area of 12 acres within a drainage area of 2.3 square miles. The dam, built for recreational purposes, is regulated by the Department of Conservation and Recreation with a high hazard potential but a satisfactory condition assessment as of March 2016.
With a controlled spillway and no associated locks, the Terry Brook Reservoir Dam has a very high risk assessment rating, making it a critical structure for water resource and climate enthusiasts to monitor. The dam, inspected every two years, has a history of compliance with state regulations and enforcement. Although no modifications or expansions have been recorded, the dam's emergency action plan was last reviewed in January 2014, aligning with guidelines for risk management measures. The dam's location in Bristol County, Massachusetts, makes it a valuable asset for both recreational enjoyment and water resource management in the region.
Dam Length |
1300 |
Dam Height |
26 |
River Or Stream |
TERRY BROOK |
Primary Dam Type |
Rockfill |
Surface Area |
12 |
Hydraulic Height |
23.5 |
Drainage Area |
2.3 |
Nid Storage |
150 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
26 |
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.
Terry Brook Reservoir Dam
Boat Ramp Road Dighton