Marshall Reservoir No. 2 Reservoir Report

Last Updated: December 6, 2025

Marshall Reservoir No.


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Summary

2, located in Robinson Township, Pennsylvania, is a privately owned dam completed in 1928 for recreational purposes. The dam stands at a height of 37 feet and has a length of 330 feet, creating a storage capacity of 353 acre-feet and a normal storage level of 240 acre-feet. With a surface area of 15 acres and draining an area of 1.3 square miles, the reservoir is a vital water resource for the region, especially for recreational activities.

Managed by the Pennsylvania Department of Environmental Protection, Marshall Reservoir No. 2 is regulated, inspected, and enforced by state authorities to ensure its structural integrity and compliance with safety standards. The dam has been assessed to be in satisfactory condition, with a significant hazard potential due to its size and location. Emergency action plans and risk management measures are in place to address any potential threats or incidents that may arise, although specific details on their preparation and implementation are not provided in the data.

Water resource and climate enthusiasts can appreciate Marshall Reservoir No. 2 for its historical significance, recreational value, and role in providing water storage for the surrounding area. The dam's presence along the WEST BRANCH ST PATRICKS RUN river/stream contributes to the local ecosystem and offers opportunities for outdoor recreation. As a regulated structure with a significant hazard potential, ongoing monitoring and maintenance ensure the safety and functionality of Marshall Reservoir No. 2 for both human enjoyment and environmental stability in the region.

Year Completed

1928

Dam Length

330

Dam Height

37

River Or Stream

WEST BRANCH ST PATRICKS RUN

Primary Dam Type

Earth

Surface Area

15

Drainage Area

1.3

Nid Storage

353

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

37
       
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.