WILLIAMS — Fire managers will be conducting prescribed pile burns throughout the winter season as conditions safely allow. Winter is often the ideal time for crews to burn piles of slash and woody debris left over from forest thinning projects because colder temperatures and snow help moderate fire behavior and keep it from spreading beyond the piles. Approximately 5,000 acres of piles on the Tusayan and Williams ranger districts and 2,500 acres of piles on the North Kaibab Ranger District are slated for burning this season.