Stony Garden Reservoir Reservoir Report

Last Updated: December 14, 2025

Stony Garden Reservoir, located in Hamilton Township, Pennsylvania, is a privately-owned Earth dam that was completed in 1912 for the primary purpose of water supply.


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Summary

With a capacity of 45 acre-feet, this reservoir on Ross Common Creek serves as a vital resource for the surrounding area, storing 25 acre-feet of water under normal conditions. The dam stands at 26 feet tall and stretches 400 feet in length, with a surface area of 4 acres and a drainage area of 1.8 square miles.

Managed by the Pennsylvania Department of Environmental Protection, Stony Garden Reservoir is regulated, inspected, and enforced to ensure its structural integrity and operational efficiency. Despite its low hazard potential, the dam has not been rated for its condition assessment, highlighting the need for continued monitoring and maintenance. Emergency action plans are yet to be prepared, emphasizing the importance of proactive risk management measures to safeguard the reservoir and the community it serves.

As a significant water resource in Monroe County, Pennsylvania, Stony Garden Reservoir plays a crucial role in meeting the region's water supply needs. With a rich history dating back over a century, this dam serves as a reminder of the importance of sustainable water management practices in the face of evolving climate conditions. As water resource and climate enthusiasts, it is essential to recognize the value of reservoirs like Stony Garden in ensuring water security and resilience in the face of changing environmental challenges.

Year Completed

1912

Dam Length

400

Dam Height

26

River Or Stream

ROSS COMMON CREEK

Primary Dam Type

Earth

Surface Area

4

Drainage Area

1.8

Nid Storage

45

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

26
       
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.