(Umatilla County, OR)  --  Police say they've recovered the bodies of two missing boaters in the Columbia River.  The Umatilla County Sheriff's Office says crews found the bodies of a man and a woman underwater last night near Bobby's Beach.  That's the area where 44-year-old Janice Arsenault and 20-year-old Trenton Williams went missing on Saturday.  Police say the two disappeared while riding on a dive step of the boat as the operator was driving to shore.  An investigation is ongoing.