Wharton Boulevard Stormwater Reservoir Report

Last Updated: December 6, 2025

Wharton Boulevard Stormwater, located in Uwchlan Township, Pennsylvania, is a privately-owned stormwater management facility designed to reduce flood risk in the area.


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Summary

Completed in 1999, this earth dam stands 21 feet tall and spans 500 feet along Shamona Creek. With a storage capacity of 284 acre-feet, it serves as a critical infrastructure to protect the surrounding community from potential water-related hazards.

Managed by the Pennsylvania Department of Environmental Protection, Wharton Boulevard Stormwater is subject to state regulation, inspection, and enforcement to ensure its structural integrity and functionality. Despite being classified as having a high hazard potential, the dam's condition is assessed as fair, indicating a need for ongoing monitoring and maintenance. With a history of periodic inspections and a designated emergency action plan, this stormwater facility plays a vital role in safeguarding the local area from the impacts of severe weather events.

Chrissy Houlahan, the Democratic Representative for the area, oversees the regulatory aspects of Wharton Boulevard Stormwater, ensuring compliance with state permitting requirements and operational standards. As part of the broader flood risk reduction strategy, this facility serves as a key component in the watershed management plan for Shamona Creek, contributing to the overall resilience of the region in the face of changing climate patterns. With a focus on safety, efficiency, and environmental protection, Wharton Boulevard Stormwater exemplifies the importance of proactive water resource management in mitigating the impacts of extreme weather events.

Year Completed

1999

Dam Length

500

Dam Height

21

River Or Stream

SHAMONA CREEK

Primary Dam Type

Earth

Drainage Area

1.74

Nid Storage

284

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

21
       
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.