(Portland, OR)  --  Authorities say a body they recovered from the Clackamas River is that of an Estacada man who had been missing since March 12th.  Officials say the body of 18-year-old Brandon Powell was spotted in the river on April 28th.  Powell's family told police he left home on March 12th after smoking a highly concentrated marijuana extract.  Police say there's no indication of foul play associated with Powell's death.