Yellowstone National Park speeds up action on snow machines In an about-face, officials at Yellowstone National Park said Wednesday that they would quickly craft a plan to allow snowmobiles and snow coaches into the park in time for the winter season. After a federal judge ruled two weeks ago that Yellowstone's snowmobile-use proposal was unacceptable because it would put the health of visitors and animals at risk, park officials said they would not be able to hammer out a new plan before the season starts Dec. 15. The impasse had threatened to shut down much of Yellowstone's winter operations for the first time in decades. On Monday, park Supt. Suzanne Lewis told a business group in Cody, Wyo., that it was possible that only snowshoers and cross-country skiers would be allowed into Yellowstone. But on Wednesday, park spokesman Al Nash said that an environmental assessment allowing for the use of snow machines would be ready by early next month, followed by a 15-day comment period....