A 36-year-old man has not been located and is presumed to have drowned after the tube he was floating the Deschutes River in capsized. According to the Wasco County Sheriff’s Office, Jonathan Jensen of The Dalles was last seen late Sunday afternoon standing in the water. When the group Jensen was with returned to assist him, he was gone. Multiple agencies responded, and a search of the river and its banks late Sunday and Monday could not locate Jensen. The Sheriff’s Office says Jensen is presumed to have drowned. Search and rescue teams from Wasco, Sherman, Hood River, Klickitat, and Skamania counties were all involved in the search effort.