(Portland, OR)  --  Officials say a power outage sent thousands of gallons of raw sewage into the Willamette River in the Oak Grove area of Clackamas County.  The Oak Lodge Sanitary District says the outage caused the sewage to bypass treatment and flow into the Willamette around eleven p.m. Sunday.  Officials say the problem was caused by an electrical component failure in the newly-upgraded treatment plant.  It's estimated that about 440-thousand gallons of sewage bypassed treatment during the outage.