Weisner Hollow Slurry Reservoir Report

Last Updated: December 6, 2025

Weisner Hollow Slurry is a state-owned rockfill dam located in Ringgold Township, Jefferson County, Pennsylvania.


°F

°F

mph

Wind

%

Humidity

Summary

Standing at a height of 192 feet and spanning 1900 feet in length, this dam holds a storage capacity of 3948 acre-feet on TR Pine Run. With a drainage area of 0.33 square miles, this structure serves a primary purpose classified as 'Other', suggesting a unique function beyond conventional water resource management.

Despite its fair condition assessment and high hazard potential, Weisner Hollow Slurry is regulated, permitted, inspected, and enforced by the Pennsylvania Department of Environmental Protection. This assurance of oversight ensures that the dam meets safety standards and mitigates potential risks to downstream communities in the event of a breach. The last inspection took place on October 24, 2018, with a frequency of one inspection per year, indicating ongoing monitoring and maintenance efforts to uphold the dam's structural integrity.

Enthusiasts of water resources and climate science will find Weisner Hollow Slurry to be a captivating case study of dam infrastructure management in Pennsylvania. With its unique design features, regulatory framework, and critical role in water storage and flood control on TR Pine Run, this dam exemplifies the intersection of engineering, environmental protection, and public safety in the management of water resources amidst changing climate conditions.

Dam Length

1900

Dam Height

192

River Or Stream

TR PINE RUN

Primary Dam Type

Rockfill

Drainage Area

0.33

Nid Storage

3948

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

192
       
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.