Authorities said a motorcyclist was injured when he struck a semi-tractor trailer in Delaware County. 48 year old Shawn Pohlman of Hopkinton was taken to University of Iowa Hospitals and Clinics for treatment of his injuries. According to the Iowa State Patrol, Pohlman was operating a motorcycle south on 260th Street shortly after 9pm Saturday in rural Delhi when his motorcycle struck the trailer potion of a semi operated by 44 year old Jerry Watts of Coggon. Watts was backing the semi into a driveway off 260th Street. Authorities are investigating the crash.