Greenwood Pond Dam Reservoir Report

Last Updated: December 12, 2025

Greenwood Pond Dam, located in Worcester, Massachusetts, is a privately owned structure regulated by the Department of Conservation and Recreation.


°F

°F

mph

Wind

%

Humidity

Summary

The dam, with a height of 7.7 feet and a hydraulic height of 5.7 feet, serves primarily for recreational purposes along the Mahoney Brook. It has a storage capacity of 135 acre-feet and a surface area of 29 acres, providing a picturesque setting for outdoor activities.

Despite being classified as having a significant hazard potential, the dam is currently in fair condition, as assessed in March 2016. The inspection frequency is every 5 years, with the last inspection conducted in March 2016. The risk assessment for Greenwood Pond Dam is moderate, with a DSAC assigned date not specified. While the dam does not have an Emergency Action Plan (EAP) in place, it meets regulatory guidelines and has not experienced major modifications in recent years.

With its serene location in Westminster, Massachusetts, Greenwood Pond Dam stands as a vital structure for both recreational and environmental purposes. Climate enthusiasts and water resource advocates can appreciate the role this dam plays in providing a habitat for wildlife and offering opportunities for outdoor recreation, while also recognizing the importance of maintaining its structural integrity and safety measures for the surrounding community.

Dam Length

500

Dam Height

7.7

River Or Stream

MAHONEY BROOK

Primary Dam Type

Gravity

Surface Area

29

Hydraulic Height

5.7

Drainage Area

0.23

Nid Storage

135

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

8
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.