Groups Challenge New Yellowstone Snowmobile Plan

Law360, New York (December 12, 2008, 12:00 AM EST) -- The Sierra Club and several conservation groups have sued the U.S. government over a regulation that permits more than 700 snowmobiles a day into Yellowstone National Park, a rule the groups claim violates a federal court's ruling that allowing 500 a day would be unlawful.

In a complaint filed Monday in the U.S. District Court for the District of Columbia against Secretary of the U.S. Department of the Interior Dirk Kempthorne and two NPS officials, the environmental groups asked the court to grant declaratory and injunctive...
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