The charges stem from a wreck in February. Cooper lost control of his SUV when he was driving home. He suffered severe injuries and had to be airlifted to Vanderbilt University Medical Center.
The senator was charged with DUI last month after the Tennessee Highway Patrol found he had a blood alcohol content (BAC) of 0.18 percent, more than double the legal limit for DUI in Tennessee.
Prior to the crash, Cooper had attended three lawmaker receptions in Nashville where alcohol had been served. The crash had postponed his federal land fraud trial.