A Mauston man was charged with OWI-5th offense. According to the criminal complaint, last Wednesday, July 23, a state trooper initiated a traffic stop on a vehicle for a non-functioning turn signal. Upon contact with the driver, 53-year-old William Grainger, the trooper could smell an odor of intoxicants emitting from the vehicle. The complaint states the trooper also saw signs of impairment. A records check showed that Grainger had four OWI prior convictions, restricting his blood alcohol concentration (BAC) to 0.02 when driving. The trooper asked Grainger if he had been drinking, and Grainger said he had earlier in the day. Grainger agreed to perform field sobriety tests and his preliminary breathe test showed 0.064. Based on the tests, the admission of drinking, and the BAC restriction, the trooper arrested Grainger, and transported him to Mile Bluff Medical Center for a blood draw. After Grainger had been medically cleared, he was transported to the Juneau County Jail. Online court records show that Grainger was released on a $5,000 signature bond and he is to maintain absolute sobriety. His initial appearance is set for early August.