PLYMOUTH — An Indiana Department of Transportation snowplow driver was arrested early Monday for suspicion of operating a vehicle while intoxicated and possession of a firearm without a valid license. The Marshall County Sheriff’s Department was contacted by a representative of InDOT who believed the driver possibly was intoxicated while operating the plow truck, according to a news release from the sheriff’s department. The 47-year-old Leroy, Ind., man was stopped by the InDOT representative at U.S. 30 and Rose Road when police arrived. He had a blood alcohol content of 0.11 percent after taking a certified chemical test, according to police. During the investigation, authorities found a handgun inside the truck that belonged to the man; however, the permit had expired in 2007, police said. The man was lodged in the Marshall County Jail and later released on a $1,000 cash bond.