Laramie, WY – The superintendent of Yellowstone National Park is defending a proposal to close the park's eastern entrance during the winter. Suzanne Lewis cites safety concerns, a tightening park budget and declining traffic as reasons to shut down the East Entrance to snowmobiles and snowcoaches. Park officials are especially concerned about the risk of avalanches on Sylvan Pass near the East Entrance. But some local business leaders aren't happy about the proposal. They say they'll lose business.