Stillwater Mill Pond Reservoir Report

Last Updated: December 6, 2025

Stillwater Mill Pond, located in Smithfield, Rhode Island, along the Stillwater River, is a privately owned dam with a primary purpose of 'Other'.


°F

°F

mph

Wind

%

Humidity

Summary

The dam is an Earth type structure with a height of 15 feet and a hydraulic height of 10 feet, creating a reservoir with a normal storage capacity of 35 acre-feet. The dam is classified as having a low hazard potential, but its condition assessment is poor as of May 2018.

Despite its poor condition assessment, Stillwater Mill Pond remains an important water resource in Providence County, Rhode Island. With a surface area of 7 acres and a drainage area of 11 square miles, the dam plays a crucial role in regulating water flow and providing water storage in the region. The dam has a maximum discharge capacity of 1051 cubic feet per second and a spillway width of 63 feet.

However, there are concerns about the dam's structural integrity and emergency preparedness. The dam's poor condition assessment and lack of regular inspections raise questions about its long-term sustainability and safety. Climate enthusiasts and water resource experts may want to monitor developments at Stillwater Mill Pond to ensure proper maintenance and management of this important water infrastructure.

Dam Length

200

Dam Height

15

River Or Stream

STILLWATER RIVER

Primary Dam Type

Earth

Surface Area

7

Hydraulic Height

10

Drainage Area

11

Nid Storage

50

Structural Height

16

Hazard Potential

Low

Nid Height

16
       
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.