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US Fish & Wildlife Service FieldNotes

Wind Energy Company Commits to Conserving Endangered Bats

Region 5, February 3, 2014

Criterion Power Partners, LLC, (Criterion Wind) has formalized the conservation measures employed at its 28-turbine wind project in Garrett County, Maryland, to avoid and minimize effects of the wind project on endangered Indiana bats (Myotis sodalis) and other wildlife. Criterion Wind is part of Exelon Generation's portfolio of wind projects.


The conservation measures are part of a habitat conservation plan for Indiana bats which was required for the incidental take permit issued to Criterion Wind. The measures include modifying wind turbine operations during the fall to reduce bat collisions with turbine blades and barotrauma, an injury that results from sudden drops in air pressure near spinning turbine blades. The modifications minimize blade rotations at night when wind speeds are low, which is when bats are most active.

Developing and implementing a habitat conservation plan is a requirement for obtaining an incidental take permit under the Endangered Species Act (ESA). Without such a permit, it is illegal to harm or kill federally threatened and endangered species under the ESA. The plan and permit allow for projects that potentially impact threatened or endangered species to continue while the company takes actions to avoid, minimize and mitigate for the impacts.

The Criterion Wind habitat conservation plan was approved by U.S. Fish and Wildlife Service as part of the rigorous process of granting the Indiana bat incidental take permit. Under the plan, Criterion Wind will adjust wind turbine operations during the fall in order avoid or minimize impacts to Indiana bats, which will also benefit other species of bats, such as eastern red bats, hoary bats, little brown bats, and big brown bats. Additionally, Criterion Wind will protect a nearby cave hibernaculum by installing a bat-friendly protective gate by 2016 to offset the unavoidable impacts to Indiana bats from turbine operations.

Criterion Wind has also voluntarily developed an avian protection plan that will lower the risk of impacts for migratory birds. Protective measures included burying all power collection lines and minimizing lighting at night at the turbines and buildings on site.

The Service evaluated both the habitat conservation plan and the avian protection plan and provided a thorough analysis in an environmental assessment. Documents are available at http://www.fws.gov/chesapeakebay/.

For more information contact:
Julie Slacum
410-573-4595 (office)


Contact Info: Jennifer Lapis, (413) 253-8303, jennifer_lapis@fws.gov