Exelon Corporation

Greene Valley Prairie

Naperville, Illinois, United States

Certified through 2022

Project Name
Project Type
Greene Valley ROW
Grassland

About the Program
The Greene Valley Prairie, located about 40 miles southwest of Chicago, Illinois, is an active transmission right-of-way. Site managers from ComEd, an Exelon Company, have maintained 16 acres of thriving prairie habitat. Conservation objectives for this project are focused on maintaining the prairie habitat,; increasing plant diversity and pollinator habitat; restoring the habitat through adaptive management; partnering with adjacent landowners on conservation initiatives; meeting ComEd's prairie standards; and meeting the University of Illinois-Chicago's ROW as Habitat working group definition of pollinator habitat.

Practices and Impacts

  • In 2009, ComEd created 16 acres of prairie habitat within their transmission line right-of-way in Greene Valley. Site managers employ many techniques for maintaining the high-quality habitat, including selective herbicide treatment, monitoring, and prescribed burning.
  • Annual monitoring is conducted to collect data plant species and their floristic qualities. Monitoring data from 2019 indicated 94 native plant species, mostly dominated by native warm-season grasses, including Indian grass, switch grass, and big bluestem, with notable high-value species such as prairie brome, pale purple coneflower, culver's root, bristly aster, and side-oats grama.
  • The site's robust plant diversity provides high-quality habitat for pollinators. Monitoring conducted in 2019 identified multiple species of bees, flies, butterflies, wasps, and beetles.
  • The University of Illinois-Chicago Tier 3 Rights-of-Way as Habitat Pollinator Scorecard provides a qualitative rating of habitat quality and plant composition based on site surveys. The Greene Valley prairie scored very highly with 78 total points; scores of 20 or more are considered robust rights-of-way pollinator habitat.
  • A contractor, Stantec, provides technical services to assist with the management and development of the project, including formulating habitat management plans, conducting assessments on an annual basis, identifying new or worsening threats, and more. On average, Stantec staff spends nearly 70 hours on project-specific activities annually.

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