Mill Pond Reservoir Report

Last Updated: December 6, 2025

Mill Pond, also known as Anthony Mill Pond, is a privately owned dam located in Coventry, Rhode Island.


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Summary

Built in 1800, this gravity dam stands at 19 feet tall and has a hydraulic height of 14 feet. With a storage capacity of 462 acre-feet, it serves as a crucial water resource for the surrounding area, covering a surface area of 30 acres and draining a watershed of 68 square miles.

Despite its historical significance and water storage capabilities, Mill Pond faces challenges in terms of its condition assessment, with a poor rating as of May 2018. The dam has been classified as having a significant hazard potential, requiring regular inspections every five years to ensure public safety. Additionally, its emergency action plan and risk management measures are currently lacking, raising concerns about the potential impact of any unforeseen events on the surrounding community and environment.

As water resource and climate enthusiasts, it is crucial to monitor the maintenance and safety protocols of structures like Mill Pond to protect not only the dam itself but also the downstream areas that rely on its water storage capacity. By staying informed about its condition assessments, hazard potential, and emergency preparedness plans, we can work towards ensuring the resilience and sustainability of this important water resource in Rhode Island.

Year Completed

1800

Dam Length

285

Dam Height

19

River Or Stream

PAWTUXET RIVER-SOUTH BRANCH

Primary Dam Type

Gravity

Surface Area

30

Hydraulic Height

14

Drainage Area

68

Nid Storage

462

Structural Height

21

Hazard Potential

Significant

Nid Height

21
       
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.