Feds propose much fewer snowmobiles in Yellowstone A cap on snowmobile use in Yellowstone and Grand Teton national parks would be lowered by 40 percent under a federal proposal released Monday in response to a judge's rejection of earlier plans. Parks officials had proposed allowing up to 605 snowmobiles a day in the two parks, but U.S. District Judge Emmet Sullivan rejected that plan in September, agreeing with plaintiff environmental groups that it would increase air pollution, disturb wildlife and cause too much noise. The new plan calls for a cap of 318 snowmachines a day in Yellowstone and another 50 in Grand Teton to the south. Park administrators said they expect it will be adopted by Dec. 15. Yellowstone winter use planner John Sacklin said the new cap would meet Sullivan's concerns while park administrators again try to form a long-term plan for the machines. The cap would expire after three years....