Greisinger Reservoir Report

Last Updated: December 6, 2025

Greisinger, a privately owned dam located in Clinton Township, Pennsylvania, was completed in 1956 for the primary purpose of recreation along the TR Bull Creek.


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Summary

Standing at a height of 19 feet with a length of 370 feet, the earth dam has a storage capacity of 72 acre-feet and covers a surface area of 5 acres, serving as a popular destination for outdoor enthusiasts in Butler County. The dam is regulated by the Pennsylvania Department of Environmental Protection and undergoes regular inspections to ensure its safety and compliance with state regulations.

Despite its low hazard potential, Greisinger has not been rated for its condition assessment, but it has a recommended inspection frequency of every 5 years. The dam's emergency action plan (EAP) status and risk management measures are currently not fully documented, and there is limited information available on the dam's risk assessment and inundation maps prepared. The dam's location within the Pittsburgh District adds to its significance for water resource and climate enthusiasts interested in the management and conservation of water resources in the region, highlighting the importance of maintaining safe and sustainable infrastructure for recreational and environmental purposes.

Year Completed

1956

Dam Length

370

Dam Height

19

River Or Stream

TR BULL CREEK

Primary Dam Type

Earth

Surface Area

5

Drainage Area

0.6

Nid Storage

72

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

19
       
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.