ORONO, Maine — A Houlton ambulance sustained extensive damage Sunday evening after striking a Maine Department of Transportation plow truck on Interstate-95 near the Stillwater Avenue exit. According to Houlton Fire Chief Milton Cone, two Houlton paramedics were returning from Eastern Maine Medical Center in Bangor, where they had transferred a patient from Houlton Regional Hospital, when the ambulance sideswiped a Maine DOT plow truck shortly after 7 p.m. “The ambulance was heading north on I-95 after transferring a patient when they came upon a two MDOT plow trucks,” Cone said.