Stony Run Reservoir Report
Last Updated: December 13, 2025
Stony Run is a state-regulated earth dam located in Hartley Township, Union County, Pennsylvania, specifically designed for water supply purposes.
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Summary
Standing at a height of 39 feet and stretching 230 feet in length, this dam serves to store and distribute water for the surrounding area. The dam has a normal storage capacity of 26 acre-feet and a maximum storage of 34 acre-feet, covering a surface area of 3 acres with a drainage area of 1.25 square miles.
Managed by the Pennsylvania Department of Environmental Protection, Stony Run poses a significant hazard potential and undergoes inspections every two years, with the last assessment conducted in January 2014. While the condition assessment remains unrated, the dam's emergency action plan status, risk assessment, and inundation maps readiness are unspecified. This structure plays a crucial role in securing water resources for the region, highlighting the importance of efficient maintenance and monitoring to ensure its safety and functionality in the face of changing climate conditions and water demands.
As water resource and climate enthusiasts, understanding and advocating for the proper management of infrastructure like Stony Run is essential for sustainable water supply and climate resilience. By staying informed about the dam's characteristics, regulatory oversight, and emergency preparedness, stakeholders can contribute to safeguarding this critical water resource and promoting effective water management practices to address the challenges posed by a changing climate.
Dam Length |
230 |
Dam Height |
39 |
River Or Stream |
STONY RUN |
Primary Dam Type |
Earth |
Surface Area |
3 |
Drainage Area |
1.25 |
Nid Storage |
34 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
39 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Bob White
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Bison
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Owl
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James West
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White Buffalo
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Baden Powell
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Stony Run