Township Line (Airport Road) Reservoir Report

Last Updated: December 5, 2025

Township Line (Airport Road) is a private dam located in West Goshen Township, Chester County, Pennsylvania.


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Summary

Built in 1935, this earth dam stands at a height of 34 feet and spans 530 feet in length across the East Branch Chester Creek. With a primary purpose of recreation and water supply, the dam has a storage capacity of 1150 acre-feet, serving as a vital resource for the surrounding area.

Managed by the Pennsylvania Department of Environmental Protection, Township Line (Airport Road) is subject to state regulation, permitting, inspection, and enforcement to ensure its safety and compliance with standards. Despite being assessed as in fair condition, it is classified with a high hazard potential due to its proximity to populated areas downstream. The dam has undergone modifications in 2001 and 2011 to improve its hydraulic capabilities, demonstrating ongoing efforts to enhance its resilience.

Considered a significant structure within the watershed, Township Line (Airport Road) plays a crucial role in water management and recreational activities in the region. With its historical significance dating back several decades, this dam continues to be monitored and maintained to mitigate risks and ensure the safety of the local community. Its presence highlights the intersection of water resource management, climate resilience, and recreational opportunities in the area.

Years Modified

2001 - Hydraulic, 2011 - Hydraulic

Year Completed

1935

Dam Length

530

Dam Height

34

River Or Stream

EAST BRANCH CHESTER CREEK

Primary Dam Type

Earth

Surface Area

65

Drainage Area

2.67

Nid Storage

1150

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

34
       
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.