Simonds Pond Dam Reservoir Report
Nearby: Goodfellow Pond Dam Mirror Lake Dam
Last Updated: December 22, 2025
Located in Leominster, Massachusetts, Simonds Pond Dam is a masonry structure built in 2006 for water supply purposes along the Monoosnoc Brook.
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Summary
With a height of 32.3 feet and a hydraulic height of 26.1 feet, the dam has a storage capacity of 97 acre-feet, with a normal storage level of 51.6 acre-feet. The dam covers a surface area of 5.8 acres and serves as a vital resource for the surrounding area.
Regulated by the Department of Conservation and Recreation in Massachusetts, Simonds Pond Dam has a significant hazard potential but is currently assessed as being in satisfactory condition. The dam has not undergone any modifications since its construction and is subject to inspections every five years. With moderate risk assessment, the dam plays a crucial role in water management and supply in the Worcester County area, highlighting the importance of its maintenance and upkeep to ensure the safety and security of the community.
Year Completed |
2006 |
Dam Length |
365 |
Dam Height |
32.3 |
River Or Stream |
MONOOSNOC BROOK |
Primary Dam Type |
Masonry |
Surface Area |
5.8 |
Hydraulic Height |
26.1 |
Drainage Area |
4.91 |
Nid Storage |
97 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
32 |
Seasonal Comparison
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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.
Simonds Pond Dam