A large pipe washed ashore Tuesday on the Washington coast near the mouth of the Columbia River at Cape Disappointment State Park.

It's 19 feet long and 3 feet in diameter.

State officials are trying to determine whether its debris from the March 2011 tsunami in Japan, but there are no markings that would help.

The state Marine Debris Task Force says the state Fish and Wildlife Department is checking for any invasive species in the seaweed clinging to the cylinder.

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Washington State Parks photos: http://bit.ly/129RWzm