Oak Tree Reservoir Report

Last Updated: December 5, 2025

Oak Tree is a private-owned dam located in Shenango Township, Mercer County, Pennsylvania, along the Oak Branch stream.


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Summary

Built in 1967, this earth dam stands at a height of 24 feet and stretches 245 feet in length, with a storage capacity of 68 acre-feet. The primary purpose of Oak Tree Dam is for recreation, offering a surface area of 4.3 acres within a drainage area of 1.27 square miles.

Managed by the Pennsylvania Department of Environmental Protection, Oak Tree Dam is state-regulated and undergoes regular inspections, with the last inspection conducted in July 2019. Classified with a low hazard potential and a condition assessment of "Not Rated," this structure has not been evaluated for its emergency action plan (EAP) preparedness or risk management measures. Despite its relatively low risk, Oak Tree Dam remains an important feature for water resource and climate enthusiasts seeking recreational opportunities in the area.

With its serene setting and recreational offerings, Oak Tree Dam serves as a valuable asset within the community, providing both leisure activities and crucial water resource management functions. As enthusiasts explore the dam's surroundings, they can appreciate its historical significance and the role it plays in enhancing the local environment. Its regulated status and regular inspections ensure its continued safety and functionality, making it a noteworthy site for those interested in water resource management and climate-related activities.

Year Completed

1967

Dam Length

245

Dam Height

24

River Or Stream

OAK BRANCH

Primary Dam Type

Earth

Surface Area

4.3

Drainage Area

1.27

Nid Storage

68

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

24
       
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.