The Japanese Consulate in Portland confirms the 66-foot dock that washed up on Agate Beach was ripped loose from its moorings by the tsunami.   Chris Havel with Oregon State Parks says, as far as he knows, it's the largest piece of tsunami debris recovered so far.  As a precaution they tested it for radiation, and that wasn't a problem.  The animals growing on the dock are a problem, since they're not natural to this part of the Pacific.  They’ll take that into consideration when they determine how to remove the dock.