Plunkett Reservoir Dam Reservoir Report

Last Updated: December 10, 2025

Plunkett Reservoir Dam, located in Hinsdale, Massachusetts, was completed in 1875 and stands at a height of 27 feet.


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Summary

This earth dam, primarily designed for recreation purposes, also serves as a water supply source. With a maximum storage capacity of 1386 acre-feet and a normal storage level of 1090 acre-feet, the dam impounds the waters of Frisell Brook over a surface area of 73 acres.

The dam's high hazard potential and fair condition assessment indicate the need for regular inspections and maintenance. The state-regulated structure is under the jurisdiction of the Department of Conservation and Recreation, and it is subject to permitting, inspection, and enforcement. While the risk assessment classifies the dam as moderate, measures for risk management and emergency action planning may need further development to ensure the safety of the surrounding community and environment in case of a potential breach.

Water resource and climate enthusiasts interested in the Plunkett Reservoir Dam can appreciate its historical significance, recreational value, and role in water supply. The dam's presence on Frisell Brook, its construction details, and regulatory oversight provide a rich context for understanding the intersection of human infrastructure and natural resources in Berkshire, Massachusetts. An appreciation for the balance between utilization and safeguarding of water resources can be gained through studying the operations and management of this critical dam structure.

Year Completed

1875

Dam Length

570

Dam Height

27

River Or Stream

FRISELL BROOK

Primary Dam Type

Earth

Surface Area

73

Hydraulic Height

25

Drainage Area

2.94

Nid Storage

1386

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

27
       
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.