Taylorville-based Dunn's Ambulance has given notice that it plans to close its Mattoon operation sometime on or before May 31. The closure would leave Mattoon based Mitchell-Jerdan Ambulance Service as the sole provider of ambulance services in Mattoon. The city ended the Mattoon Fire Department's ambulance service on July 25, but the department has retained advanced life support equipment on its fire trucks to provide backup service as needed. City Administrator Kyle Gill said he received a notification letter from Dunn's on Wednesday. Gill said he has been letting members of the Mattoon City Council know that they will soon need to collectively discuss the issue of ambulance coverage for the community. "We will be discussing what direction we go from here," Gill said. The next regularly scheduled council meeting is set for 6:30 p.m. Tuesday in City Hall.