Langworthy Pond Reservoir Report

Last Updated: December 6, 2025

Langworthy Pond, located in Hopkinton, Rhode Island, is a privately owned dam that serves as an essential water resource in the area.


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Summary

This earth dam, standing at a height of 9 feet with a hydraulic height of 8 feet, plays a crucial role in regulating the flow of Brushy Brook-tributary. With a storage capacity of 3 acre-feet, the pond covers an area of 1 acre and has a spillway width of 14 feet.

Despite being classified as having a significant hazard potential, Langworthy Pond is currently in fair condition, as assessed in October 2017. The dam has been inspected regularly every 5 years, with the last inspection conducted in November 2011. While no major modifications or risk management measures have been reported, the pond's emergency action plan status and adherence to guidelines remain unclear. With its importance to the local water supply and environmental ecosystem, Langworthy Pond stands as a critical infrastructure requiring continuous monitoring and maintenance to ensure its safety and functionality for the community.

Managed by a private owner, Langworthy Pond's presence highlights the intersection of water resource management and climate resilience in Rhode Island. As a state-regulated and permitted structure, the pond represents a key element in the region's water infrastructure, providing both storage capacity and flood control measures. With the potential for significant hazard, continued efforts in risk assessment, emergency preparedness, and maintenance are essential to safeguarding the pond and its surrounding areas from potential disasters.

Dam Length

130

Dam Height

9

River Or Stream

BRUSHY BROOK-TRIB

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

8

Nid Storage

3

Structural Height

9

Hazard Potential

Significant

Nid Height

9
       
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.