Ten Threats: Closing a Door

  • Coast Guard Marine Science Technician Sheridan McClellan demonstrates some of the equipment used to check the ballast water of foreign ships. Environmentalists believe the Coast Guard should be given the equipment and authority to more thoroughly check the ships for invasive species in ballast water. (Photo by Lester Graham)

In this “Ten Threats to the Great Lakes” series, we found experts across the region point to alien invasive species as the number one challenge facing the Lakes. The Great Lakes have changed dramatically because of non-indigenous species that compete for food and space with native fish and organisms. More than 160 foreign aquatic species have been introduced since the Lakes were opened to shipping from overseas. It’s believed that many of the invasive species hitched a ride in the ballast tanks of ocean-going cargo ships.

Transcript

Today we’ll hear more about Ten Threats to the Great Lakes. The Great Lakes Radio Consortium’s Lester Graham has the next report in the series:


In this “Ten Threats to the Great Lakes” series, we found experts across the region point to alien invasive species as the number one challenge facing the Lakes. The Great Lakes have changed dramatically because of non-indigenous species that compete for food and space with native fish and organisms. More than 160 foreign aquatic species have been introduced since the Lakes were opened to shipping from overseas. It’s believed that many of the invasive species hitched a ride in the ballast tanks of ocean-going cargo ships.


Foreign ships entering the Great Lakes are boarded and inspected in Montreal, long before the ships enter U.S. Waters. Sheridan McClellan is a marine science technician with the U.S. Coast Guard. He says inspectors take samples of the ballast water and test it onboard ship. He demonstrates the equipment at the Coast Guard lab in Massena, New York.


MCCLELLAN: “And when you look through this refractometer, if you look on the right hand side, you will see the salinity… If you’d like to look through it…”


GRAHAM: “Oh, yeah. I see.”


MCCLELLAN: “You see a line?”


GRAHAM: “Right.”


The inspectors want to see salt in the water. That means the ship exchanged ballast water from a freshwater port with ocean water that kills most freshwater organisms hiding out in the ballasts.


“Once we check all the ballast tanks and they’re all good to go, we tell the captain that he’s allowed to discharge his ballast in the Great Lakes if he so desires.”


And that’s it; if the ship’s ballast contains ocean water and the log shows the water came from deep ocean, it’s good to go. Lieutenant Commander James Bartlett commands the Massena station. He says that’s all the Coast Guard can do.


“We’ve been asked if we are actually checking for the organisms and doing, you know, a species count. Right now, that technology’s not available to us nor, really, do we have that capability in our regulations. It’s essentially, it’s a log check, an administrative, and then also a physical salinity check.”


But a ship can also be allowed into the Great Lakes if its ballast tanks are empty. Ships fill their ballasts tanks to keep the vessel stable in the water. When a ship is fully loaded with cargo, it sits deep enough in the water that it doesn’t need ballast water for stability. It’s declared as “No Ballast on Board,” or NOBOB.


But “No Ballast On Board” does not mean empty; there’s always a little residual water and sediment.


(Sound of footsteps thumping on metal)


Deep inside the S.S. William A Irvin, an out-of-service iron ore ship that’s permanently docked in Duluth, Minnesota, Captain Ray Skelton points out the rusty structure of the ballast tanks.


“You can see by all the webs, scantlings, cross members, frames, just the interior supports for the cargo hold itself, and the complexity of this configuration, that it wouldn’t be possible to completely pump all of the tank.”


And a recent study of NOBOB ships found there’s a lot more than just water and sediment sloshing around in the bottom of the tanks. David Reid headed up the study. He says there are live organisms in both the water and the sediment.


“If you multiply it out, you see that there are millions of organisms even though you have a very small amount of either water or sediment.”


And when ships load or unload they discharge or take on ballast water, that stirs up the water and sediment in the bottom of the ballast tanks along with the organisms they’re carrying from half way around the world, and they end up in the Great Lakes.


The shipping industry says for the past few years, the security regulations since 9/11 have been more important to the industry than dealing with ballast water. Helen Brohl is Executive Director of the U.S. Great Lakes Shipping Association. She says the shipping industry hasn’t forgotten; it is paying close attention to concerns about ballast water.


“From my perspective, in ten years, ballast water is not an issue, because in ten years there’ll be treatment technology on most ships. We’re moving right along. Ballast, in some respects, is kind of beating a dead horse.”


But environmentalists and others say ten years to get most of the ships fitted with ballast water treatment equipment is too long. New non-indigenous species are being introduced to the Lakes every few months.


The invasive species that are already in the Great Lakes are costing the economy and taxpayers about five billion dollars a year. The environmentalists insist Congress needs to implement new ballast regulations for the Coast Guard soon.


They also say the Environmental Protection Agency should start treating ballast water like pollution before more invasive species catch a ride in the ballast tanks of the foreign freighters and further damage the Lakes.


For the GLRC, this is Lester Graham.

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