Leaser Lake Reservoir Report

Last Updated: December 7, 2025

Leaser Lake, located in Lynn Township, Pennsylvania, is a state-regulated body of water primarily used for recreation.


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Summary

The dam, completed in 1971, is an earth structure with a height of 56 feet and a length of 453 feet. The lake has a storage capacity of 2,685 acre-feet and covers an area of 117 acres, with a drainage area of 3.1 square miles. Despite its fair condition assessment, Leaser Lake is classified as having a high hazard potential.

In 2012, the dam underwent modifications to its foundation and hydraulic components. The Pennsylvania Department of Environmental Protection is responsible for regulating, inspecting, and enforcing compliance at Leaser Lake. The last inspection was conducted in January 2021, with a frequency of one inspection per year. While the lake does not have an Emergency Action Plan (EAP) in place, it meets state guidelines for safety and risk management measures.

Water resource and climate enthusiasts can appreciate Leaser Lake for its recreational opportunities and ecological significance. The lake serves as a vital habitat for local wildlife and offers a serene escape for visitors. With ongoing regulatory oversight and maintenance efforts, Leaser Lake continues to provide a valuable resource for the community while ensuring public safety and environmental sustainability.

Years Modified

2012 - Foundation, 2012 - Hydraulic

Year Completed

1971

Dam Length

453

Dam Height

56

River Or Stream

JACKSONVILLE BR ONTELAUNEE CR

Primary Dam Type

Earth

Surface Area

117

Drainage Area

3.1

Nid Storage

2685

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

56
       
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.