(Combined Sources) Emergency services were called to Little Mohawk Road in Shelburne early yesterday afternoon after a report of an ATV rollover. A teenager involved in the crash was transported by helicopter to Baystate’s trauma center in Springfield. According to those on the scene, the ATV had left the trail and rolled over with two passengers on board. One of the riders refused treatment.  The injuries to the other rider have been described as severe but not life-threatening.