Goodfellow Pond Dam Reservoir Report
Nearby: Simonds Pond Dam Notown Reservoir Dam
Last Updated: January 11, 2026
Goodfellow Pond Dam, located in Leominster, Massachusetts, is a rockfill dam that was completed in 1920 for the primary purpose of water supply.
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Summary
It stands at a height of 24 feet and has a normal storage capacity of 50 acre-feet. The dam is situated on Monoosnoc Brook and is regulated by the Department of Conservation and Recreation in Massachusetts. Despite its low hazard potential, the dam is currently in poor condition, with a moderate risk assessment rating of 3 out of 5.
The dam has a drainage area of 4.76 square miles and a storage capacity of 63 acre-feet. While it has not undergone any modifications in recent years, it is subject to regular inspections every 10 years. The spillway type is uncontrolled, with a width of 0 feet, and there are no outlet gates or associated structures. The condition assessment of the dam was last conducted in November 2017, revealing its poor state. Given its importance for water supply, efforts may need to be made to improve its condition and management to ensure the safety and reliability of the water resource it serves.
Year Completed |
1920 |
Dam Length |
220 |
Dam Height |
24 |
River Or Stream |
MONOOSNOC BROOK |
Primary Dam Type |
Rockfill |
Surface Area |
63 |
Hydraulic Height |
21 |
Drainage Area |
4.76 |
Nid Storage |
63 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
24 |
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.
Goodfellow Pond Dam