(Hood River, OR) -- The Hood River County Sheriff's Office says they are working to recover a man after his boat was found in the Columbia River. The sheriff's office received multiple reports about a small boat floating near the end of a sandbar just after 2 p.m. on Thursday. A fishing kayak was later found with its trolling motor still running. The agency believes the kayak's owner, David Kalousdian of Hood River, is dead, as he was not found during search efforts. Authorities are continuing to look for him in what they describe as a recovery mission.