Washington state Ecology Department spokeswoman Kim Schmanke says the team did not find an identifying plaque like the one found on a dock that washed up on an Oregon beach last June. That dock was confirmed as debris from the March 2011 tsunami that hit Japan.
The spokeswoman says the writing and new photos are being shared with the Japanese consulate in an effort to confirm this dock as tsunami debris.
The debris team inspected five dock surfaces, attached a tracking beacon and took live samples of potentially invasive species. No schedule has been set for trying to remove the dock.
The dock was spotted Tuesday by the Coast Guard on Washington's rugged Olympic Peninsula. The site is about five miles from the nearest road.