Comet Lake Reservoir Report

Last Updated: December 5, 2025

Comet Lake in Washington Township, Pennsylvania, is a privately-owned reservoir primarily used for recreation.


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Summary

Managed by the Pennsylvania Department of Environmental Protection, this earth dam was completed in 1962 and stands at a height of 38 feet with a length of 341 feet. With a storage capacity of 62 acre-feet and a surface area of 3 acres, Comet Lake provides a serene setting for outdoor activities such as fishing, boating, and wildlife observation.

Despite its fair condition assessment and significant hazard potential, Comet Lake remains a popular destination for water resource and climate enthusiasts seeking to connect with nature. The dam's location on Spring Run, within the Baltimore District, offers a picturesque backdrop for visitors to enjoy the surrounding Franklin County landscape. While the dam has not undergone recent modifications, regular inspections are conducted every two years to ensure its structural integrity and safety for recreational use.

As a vital water resource within the region, Comet Lake serves as a reminder of the importance of sustainable water management practices and environmental stewardship. Its inclusion in the state-regulated system underscores the commitment to preserving Pennsylvania's natural beauty and ensuring the safety of its residents and visitors. Whether exploring the lake's tranquil waters or admiring its scenic views, Comet Lake remains a testament to the harmonious coexistence of human recreation and ecological conservation in a changing climate.

Year Completed

1962

Dam Length

341

Dam Height

38

River Or Stream

SPRING RUN

Primary Dam Type

Earth

Surface Area

3

Drainage Area

0.29

Nid Storage

62

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

38
       
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.