Crosby Pond Dam Reservoir Report
Last Updated: December 19, 2025
Crosby Pond Dam, located in Concord, Massachusetts, serves as a vital structure for recreational purposes.
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Summary
The dam, primarily made of concrete, stands at a height of 9 feet and has a hydraulic height of 5 feet. With a storage capacity of 30 acre-feet and a surface area of 6 acres, the dam is situated on Mill Brook and is under the regulatory jurisdiction of the Department of Conservation and Recreation.
Despite its recreational significance, Crosby Pond Dam poses a significant hazard potential with an unsatisfactory condition assessment. The last inspection in May 2012 revealed concerns, prompting a very high risk assessment ranking. Emergency action preparedness and risk management measures are lacking, indicating a need for immediate attention to ensure the safety and integrity of the structure.
As enthusiasts of water resources and climate, it is crucial to monitor and address the condition of structures like Crosby Pond Dam to mitigate potential risks and ensure the safety of surrounding communities. With its picturesque location and important recreational purpose, efforts must be made to bring the dam up to satisfactory standards and implement necessary emergency protocols to safeguard against any potential hazards.
Dam Length |
80 |
Dam Height |
9 |
River Or Stream |
MILL BROOK |
Primary Dam Type |
Concrete |
Surface Area |
6 |
Hydraulic Height |
5 |
Drainage Area |
0.5 |
Nid Storage |
30 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
9 |
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.
Crosby Pond Dam
Pond Path, Concord