Whitehall Reservoir Dam Reservoir Report

Last Updated: December 14, 2025

Whitehall Reservoir Dam, located in Hopkinton, Massachusetts, is a masonry dam built in 2002 with a primary purpose of serving as a fish and wildlife pond.


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Summary

The dam stands at a height of 8 feet and has a hydraulic height of 5 feet, providing a storage capacity of 3,145 acre-feet and a surface area of 600 acres. It is regulated by the Department of Conservation and Recreation in Massachusetts and undergoes regular inspections to ensure its structural integrity.

The dam, situated on Whitehall Brook, plays a vital role in the conservation of fish and wildlife in the area, as well as providing recreational opportunities for the community. With a drainage area of 4.6 square miles, the dam serves as a significant water resource in Middlesex County, Massachusetts. Despite having a significant hazard potential, the dam's condition has been assessed as satisfactory, and risk management measures are in place to ensure public safety.

Managed by the state, Whitehall Reservoir Dam is a key component of the local ecosystem and serves as a valuable asset for both wildlife and residents. The dam's construction and operation are overseen by state regulatory agencies, and regular inspections help to mitigate potential risks. As a focal point for fish and wildlife conservation, as well as a recreational area, the dam at Whitehall Reservoir stands as a testament to the importance of water resource management and climate resilience efforts in the region.

Year Completed

2002

Dam Length

185

Dam Height

8

River Or Stream

WHITEHALL BROOK

Primary Dam Type

Masonry

Surface Area

600

Hydraulic Height

5

Drainage Area

4.6

Nid Storage

3145

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

8
       
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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.