Rockwell Pond Dam Reservoir Report
Last Updated: December 21, 2025
Rockwell Pond Dam, located in Leominster, Massachusetts, is a local government-owned structure on the Monoosnoc River that serves primarily for recreational purposes.
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Summary
This earth dam, with a height of 20 feet and a hydraulic height of 16 feet, boasts a length of 460 feet and a storage capacity of 97 acre-feet. The dam, constructed with a buttress core type, has a surface area of 10.7 acres and drains a 10.5-acre watershed.
Despite its high hazard potential, Rockwell Pond Dam is assessed to be in satisfactory condition as of its last inspection in December 2016. The Massachusetts Department of Conservation and Recreation maintains regulatory oversight of the dam, ensuring that state permitting, inspection, and enforcement measures are in place for public safety. While the dam lacks controlled spillways, its risk assessment deems the structure to have a moderate risk level, prompting the need for ongoing monitoring and potential risk management measures. For enthusiasts of water resources and climate, Rockwell Pond Dam offers a noteworthy case study in dam infrastructure and management within the context of climate change and evolving regulatory standards.
Dam Length |
460 |
Dam Height |
20 |
River Or Stream |
MONOOSNOC RIVER |
Primary Dam Type |
Earth |
Surface Area |
10.7 |
Hydraulic Height |
16 |
Drainage Area |
10.5 |
Nid Storage |
97 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
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.
Rockwell Pond Dam