Long Run Reservoir No 1 Reservoir Report

Last Updated: December 6, 2025

Long Run Reservoir No 1, located in Franklin Township, Carbon County, Pennsylvania, is a crucial water supply reservoir managed by the local government.


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Summary

Completed in 1885, this Earth-type dam stands at a height of 26 feet and spans a length of 290 feet, with a storage capacity of 73 acre-feet. The reservoir serves the primary purpose of water supply, with a normal storage capacity of 61 acre-feet and a surface area of 3 acres.

Despite its age, Long Run Reservoir No 1 is regulated and inspected by the Pennsylvania Department of Environmental Protection, ensuring its structural integrity and safe operation. The dam has a high hazard potential but is currently assessed to be in fair condition. The last inspection was conducted in June 2020, with a frequency of once per year. While the reservoir does not have an Emergency Action Plan (EAP) in place, it meets regulatory guidelines and has emergency contacts updated as necessary.

Water resource and climate enthusiasts will appreciate the historical significance and engineering feat of Long Run Reservoir No 1, as well as its ongoing importance in providing water supply to the local community. The reservoir's location on the Long Run stream, within the Philadelphia District of the US Army Corps of Engineers, highlights the interconnectedness of water resources management in the region. With a commitment to regular inspections and regulatory oversight, Long Run Reservoir No 1 continues to play a vital role in ensuring reliable water supply and public safety in Carbon County.

Year Completed

1885

Dam Length

290

Dam Height

26

River Or Stream

LONG RUN

Primary Dam Type

Earth

Surface Area

3

Drainage Area

1.07

Nid Storage

73

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

26
       
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.