Church Manufacturing Co. Dam Reservoir Report

Last Updated: December 6, 2025

The Church Manufacturing Co.


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Summary

Dam, located in Monson, Massachusetts, is a gravity dam on Conant Brook that was completed in 1900 for the primary purpose of recreation. With a height of 13.5 feet and a hydraulic height of 10 feet, the dam offers a storage capacity of 145 acre-feet and covers a surface area of 16 acres. Despite its low hazard potential, the dam is in poor condition and is regulated by the Department of Conservation and Recreation in Massachusetts.

The dam has a moderate risk assessment rating of 3 and is inspected every 10 years, with the last inspection conducted in November 2017. Although the dam has an uncontrolled spillway type and no outlet gates, it has a drainage area of 21.6 square miles. The dam's associated structures and modifications over the years are not specified, but it is owned privately and falls under state jurisdiction for regulation, inspection, and enforcement.

Church Manufacturing Co. Dam provides a recreational outlet for the community while also serving as a water resource management structure. Its location in the Hampden County of Massachusetts makes it a valuable asset for both conservationists and climate enthusiasts who are interested in monitoring and preserving the state's water infrastructure.

Year Completed

1900

Dam Length

90

Dam Height

13.5

River Or Stream

CONANT BROOK

Primary Dam Type

Other

Surface Area

16

Hydraulic Height

10

Drainage Area

21.6

Nid Storage

145

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

14
       
Seasonal Comparison

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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.