Lake Stonycreek Reservoir Report

Last Updated: December 5, 2025

Lake Stonycreek, located in Stonycreek Township, Somerset County, Pennsylvania, is a private recreational lake regulated by the Pennsylvania Department of Environmental Protection.


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Summary

Built in 1960, this Earth dam stands at a height of 31 feet and stretches 900 feet in length, providing a storage capacity of 6050 acre-feet and a surface area of 170 acres. The dam's primary purpose is for recreation, offering various activities for water resource and climate enthusiasts to enjoy.

With a drainage area of 26.2 square miles and a normal storage capacity of 2000 acre-feet, Lake Stonycreek poses a high hazard potential but is currently assessed to be in satisfactory condition. The dam undergoes regular inspections, with the most recent one conducted in September 2020. Despite its high hazard potential, Lake Stonycreek continues to be a popular destination for recreational activities, attracting visitors to its tranquil waters and scenic surroundings. As a vital water resource in the region, efforts are in place to ensure the safety and maintenance of this beloved recreational spot for generations to come.

Year Completed

1960

Dam Length

900

Dam Height

31

River Or Stream

RHOADS CREEK

Primary Dam Type

Earth

Surface Area

170

Drainage Area

26.2

Nid Storage

6050

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

31
       
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.