(Gresham, OR)  --  Authorities are searching for a 33-year-old Portland man who's been reported missing in Gresham.  Officials say Trace Tipton was last seen on September 13th in his White Chevrolet minivan near the McDonald's on Northeast 82nd Avenue in Gresham.  Police say Tipton is reported to be a drug user who suffers from depression.  He's described as a white male, approximately six-feet-two, 220 pounds, with black hair, hazel eyes, and a large black beard.