Longford Lake Reservoir Report

Last Updated: December 6, 2025

Longford Lake, located in Silver Lake Township, Pennsylvania, is a private water resource regulated by the Pennsylvania Department of Environmental Protection.


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Summary

The dam, completed in 1974, stands at a height of 37 feet and has a length of 878 feet, creating a surface area of 24 acres with a maximum storage capacity of 355 acre-feet. The primary purpose of Longford Lake is for recreational activities, offering opportunities for fishing, boating, and enjoying the natural surroundings.

With a high hazard potential but a satisfactory condition assessment, Longford Lake is carefully inspected on a regular basis, with the last inspection occurring in November 2020. The dam is designed as an earth structure with buttress core types, serving as a crucial component for flood control and water management in the region. Despite its age, Longford Lake continues to provide valuable recreational opportunities for visitors while maintaining safety standards and environmental regulations.

Water and climate enthusiasts will appreciate the significance of Longford Lake not only as a recreational destination but as a key infrastructure for water resource management in Susquehanna County. As a privately owned water resource, it plays a critical role in balancing the needs of both human recreation and environmental conservation. With its long history of service and ongoing regulatory oversight, Longford Lake stands as a testament to the importance of responsible water resource management in the face of changing climate patterns and increasing demands on our natural resources.

Year Completed

1974

Dam Length

878

Dam Height

37

River Or Stream

TR CHOCONUT CREEK

Primary Dam Type

Earth

Surface Area

24

Drainage Area

0.39

Nid Storage

355

Hazard Potential

High

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.