Mountaindale Reservoir Reservoir Report

Last Updated: December 6, 2025

Mountaindale Reservoir, located in Smithfield, Rhode Island, is a picturesque body of water situated along Reaper Brook.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1885, this gravity dam stands at 10 feet tall and spans 120 feet in length, with a storage capacity of 50 acre-feet. Primarily used for recreation, the reservoir offers opportunities for fishing, boating, and wildlife observation in a serene natural setting.

Despite its low hazard potential, Mountaindale Reservoir is currently in poor condition, with a recent assessment highlighting the need for maintenance and improvements. The dam's inspection frequency is listed as zero, indicating a potential lack of regular monitoring. With a maximum discharge capacity of 156 cubic feet per second, it remains essential for the local government to prioritize the safety and upkeep of this water resource to prevent any potential risks or hazards.

As water resource and climate enthusiasts, there is a call to action to ensure the preservation and maintenance of Mountaindale Reservoir for future generations to enjoy. By investing in the necessary repairs and upkeep, this historical site can continue to provide recreational opportunities while also safeguarding the surrounding environment and community from any potential risks associated with dam failure. It is vital for local authorities to prioritize the restoration of this beloved reservoir to ensure its long-term sustainability and resilience in the face of changing climate conditions.

Year Completed

1885

Dam Length

120

Dam Height

10

River Or Stream

REAPER BROOK

Primary Dam Type

Gravity

Surface Area

11

Hydraulic Height

8

Drainage Area

2

Nid Storage

50

Structural Height

10

Hazard Potential

Low

Nid Height

10
       
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.