A 54 year old Hagerman man is dead after crashing into a truck hauling gravel.  The Twin Falls County Sheriff’s Department says Robert Nancolas was riding his motorcycle along River Road near Hagerman early yesterday afternoon.  In front of him was a gravel truck that had slowed to turn into a gravel pit.  Nancolas was unable to stop in time and crashed into the truck.  He died at the scene.  Nancolas was wearing a helmet.  Police say excessive speed is believed to be a factor.  The driver of the truck was not hurt.