Authorities say a pickup truck spilled a shelf onto a highway, causing a motorcyclist to crash Saturday in Dubuque. 51 year old Gordon Struve of Clinton, Iowa, was taken by ambulance to MercyOne Dubuque Medical Center for treatment of his injuries. According to Dubuque police, Struve was operating a motorcycle behind a pickup truck driven by 44 year old Shane Clancy of Hazel Green, north on Highway 61/151 just north of the Ninth Street-11th Street exit Saturday afternoon when a shelf fell onto the roadway from Clancy’s pickup. Struve attempted to avoid the shelf, causing his motorcycle to crash.