Lake Como Dam Reservoir Report

Last Updated: December 7, 2025

Lake Como Dam, located in Bristol County, Massachusetts, is a privately owned structure regulated by the Department of Conservation and Recreation.


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Summary

Standing at a height of 13 feet with a hydraulic height of 7 feet, this earthen dam serves primarily for recreational purposes, providing a storage capacity of 48 acre-feet. The dam, built on a tributary to Sevenmile River, covers a surface area of 5.5 acres and has a drainage area of 179 square miles.

Despite being categorized as having a significant hazard potential, Lake Como Dam is currently assessed to be in fair condition as of June 2012. With an inspection frequency of 5 years, the dam poses a moderate risk level (3) and has not had any major modifications since its construction. The dam's emergency action plan status and risk management measures are not specified in the data, indicating potential areas for improvement in ensuring the safety and stability of this vital water resource structure.

Dam Length

140

Dam Height

13

River Or Stream

TRIBUTARY TO SEVENMILE RIVER

Primary Dam Type

Earth

Surface Area

5.5

Hydraulic Height

7

Drainage Area

179

Nid Storage

48

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

13
       
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.