NOAA's Response and Restoration Blog

An inside look at the science of cleaning up and fixing the mess of marine pollution


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Japan Confirms Dock on Washington Coast Is Tsunami Marine Debris

A worker uses a 30% bleach spray to decontaminate the Japanese dock which made landfall on Washington’s Olympic Peninsula in December 2012.

January 3, 2013 — A worker uses a 30% bleach spray to decontaminate and reduce the spread of possible marine invasive species on the Japanese dock which made landfall on Washington’s Olympic Peninsula in December 2012. (Washington Department of Fish and Wildlife/Allen Pleus)

The Japanese Consulate has confirmed that a 65-foot, concrete-and-foam dock that washed ashore in Washington’s Olympic National Park in late December 2012 is in fact one of three* docks from the fishing port of Misawa, Japan. These docks were swept out to sea during the earthquake and tsunami off of Japan in March 2011, and this is the second dock to be located. The first dock appeared on Agate Beach near Newport, Ore., in June 2012.

Using our trajectory forecast model, NOAA’s Office of Response and Restoration helped predict the approximate location of the dock after an initial sighting reported it to be floating somewhere off of Washington’s Olympic Peninsula. When the dock finally came aground, it ended up both inside the bounds of NOAA’s Olympic Coast National Marine Sanctuary and a designated wilderness portion of Olympic National Park.

Japanese tsunami dock located on beach within Olympic National Park and National Marine Sanctuary.

In order to minimize damage to the coastline and marine habitat, federal agencies are moving forward with plans to remove the dock. In addition to being located within a designated wilderness portion of Olympic National Park, the dock is also within NOAA’s Olympic Coast National Marine Sanctuary and adjacent to the Washington Islands National Wildlife Refuge Complex. (National Park Service)

According to the Washington State Department of Ecology, representatives from Olympic National Park, Washington State Department of Fish and Wildlife, and Washington Sea Grant Program have ventured out to the dock by land several times to examine, take samples, and clean the large structure.

Initial results from laboratory testing have identified 30-50 plant and animal species on the dock that are native to Japan but not the United States, including species of algae, seaweed, mussels, and barnacles.

In addition to scraping more than 400 pounds of organic material from the dock, the team washed its heavy side bumpers and the entire exterior structure with a diluted bleach solution to further decontaminate it, a method approved by the National Park Service and Olympic Coast National Marine Sanctuary.

Government representatives are examining possible options for removing the 185-ton dock from this remote and ecologically diverse coastal area.

Look for more information and updates on Japan tsunami marine debris at http://marinedebris.noaa.gov/tsunamidebris/.

*[UPDATE 4/5/2013: This story originally stated that four docks were missing from Misawa, Japan and that “the first dock was recovered shortly afterward on a nearby Japanese island.” We now know only three docks were swept from Misawa in the 2011 tsunami and none of them were found on a Japanese island. This dock has now been removed from the Washington coast.]


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Abandoned Vessels: Drifting Across the Pacific Ocean Since 1617

Adrift Japanese fishing vessel.

The derelict Japanese fishing vessel RYOU-UN MARU drifts more than 125 miles from Forrester Island in southeast Alaska. The fishing vessel has been drifting unmanned at sea since the 2011 Japanese earthquake and subsequent tsunami more than a year ago (U.S. Coast Guard, Air Station Kodiak).

You might have already heard about the rusted-out, abandoned fishing vessel adrift off British Columbia, Canada. The 170 foot (53 meter) long vessel is the Ryou-Un Maru, a squid boat that broke free from a dock in Hokkaido, Japan, after the March 11, 2011 tsunami. Fortunately, no one was on board when the tsunami happened.

Over the past year it has drifted across the Pacific Ocean and was first observed in Canadian waters. The U.S. Coast Guard is now tracking the drift of the vessel, which entered U.S. waters March 31, 2012, and currently it is about 155 nautical miles away from Baranof Island in southeast Alaska.

The drift of the vessel confirms what generations of beach combers have known for a long time. The Pacific Ocean currents form a giant conveyor belt that carries flotsam (floating items) across the Pacific. Over the years I’ve found glass fish floats, glass bottles, and other Japanese items that have washed up along the coast of Washington state where I live.

But a big fishing vessel—that must be something really unusual—or is it?

In 2003, the 97-foot ship Genei Maru #7 caught fire and was abandoned at sea about halfway between Japan and the United States. This “ghost ship” ran aground on Kodiak, Alaska, after drifting at sea, crewless, for five months. And in 2006, the U.S. Coast Guard found an abandoned coal barge adrift off the Kenai Peninsula of Alaska, which had wandered across the Pacific from Russia.

Cover page of historical record of drifting Japanese vessels.

The document, “Record of Japanese Vessels Driven Upon the North-West Coast of America and its Outlying Islands,” was originally published in 1872.

But there is evidence that vessels have been drifting across the Pacific for a long time. Check out this old document from 1872, “Record of Japanese Vessels Driven Upon the North-West Coast of America and its Outlying Islands.”

Some archaeologists think that Indigenous cultures of the Pacific Northwest Coast have been strongly influenced by the effects of foreign shipwrecks. Artifacts from shipwrecks, including metals and other technologies, may have been used by these tribes (Quimby, G. I. 1985. Japanese Wrecks, Iron Tools, and Prehistoric Indians of the Northwest Coast. Arctic Anthropology 22(2): 7–15.).

And the blog A Blast From the Past has a lengthy discussion on historical and more recent cases of vessels washing across the Pacific.

The oldest record is from 1617, when an abandoned Japanese ship was found near Acapulco, Mexico, but there are likely many other wrecks that went unrecorded because the vessels probably stranded in areas then inhabited only by native tribes.

The March 2011 tsunami certainly added to the amount of debris floating across the Pacific. If you find items you think might be from the tsunami, you can report them to DisasterDebris@noaa.gov.