Newtown Square Substation Stewardship Program

About the Program
The Newtown Square Substation, a part of Exelon Corporation, is located in Newtown Square, Pennsylvania, approximately 25 miles east of Philadelphia. The substation is located in an urban/suburban area where wetland habitat has been greatly reduced. To help address this issue, the team has restored a native wetland as part of a site mitigation project, maintaining their work at this site far beyond any regulatory requirements

Practices and Impacts

• Common reed dominated the site when work began in 2009. Since then, an integrated management approach, using both physical removal and chemical treatment, has greatly reduced its presence.
• Wetland enhancement and monitoring activities conducted at the site from 2009 through 2014 fulfilled regulatory requirements associated with the site. Monitoring and maintenance of the created wetlands area has continued for nine years beyond the required monitoring period.
• Invasive species control, application of native seed mixes and the planting of native species has occurred since the required monitoring was completed to enhance wetland function and the habitat quality provided by the site.
• Periodic monitoring is conducted, at least biannually, as part of an adaptive management program to assess the community condition and identify any corrective actions needed to meet project objectives. In 2021, monarch habitat monitoring was added to biannual hydrology, vegetation, invasive species and wildlife monitoring.