Explosion reported at ARAUCO in Grayling, Michigan CRAWFORD COUNTY, Mich., (From news reports) -- An explosion is being investigated at ARAUCO in Crawford County. According to the Crawford County Sheriff, the explosion happened at the plant Thursday morning, Jan. 30. Crews were called to the plant at 10 a.m. on a report of an explosion and fire. Fire crews were able to control the fire under ten minutes and were on scene for more than two hours until it was extinguished. The fire is believed to have started in a dryer which led to the explosion according to the Grayling Department of Public Safety. One firefighter was taken to the hospital. The firefighter's condition is not being released at this time. There were no other injuries reported. The 820,000 square-foot facility is the largest particleboard plant in the world.