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Shipping traffic: A busy Blue Heron

The research vessel Blue Heron was active on Tuesday. It left Duluth Harbor at 7:50 a.m. and returned at 11:45 a.m., then left again at 12:15 p.m. and returned at 4:05 p.m. The vessel, which belongs to the University of Minnesota Duluth Large Lak...

Blue Heron
The Blue Heron is a research vessel for the University of Minnesota Duluth's Large Lakes Observatory. (1998 file / News Tribune)

The research vessel Blue Heron was active on Tuesday. It left Duluth Harbor at 7:50 a.m. and returned at 11:45 a.m., then left again at 12:15 p.m. and returned at 4:05 p.m. The vessel, which belongs to the University of Minnesota Duluth Large Lakes Observatory, was docked at the Corps of Engineers vessel yard overnight. The Large Lakes Observatory launched an unmanned submarine on Thursday; the Blue Heron, which the University of Minnesota purchased in 1997, performs research in a more traditional manner. It has berthing for 11 crew and scientists.

Wednesday, Sept. 23

DULUTH ENTRY

Morning: Alpena, arriving to unload concrete; Paul R. Tregurtha, departing with coal.

Afternoon: Voorneborg, departing with grain.

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Evening/night: Indiana Harbor, arriving to load coal.

SUPERIOR ENTRY

No traffic expected

TWO HARBORS

Morning: Edwin H. Gott, arriving to load iron ore pellets.

Afternoon: Edwin H. Gott, departing with iron ore pellets.

For updated information 24 hours a day, call the Boatwatcher's Hotline at (218) 722-6489.

Source: The Lake Superior Marine Museum in Canal Park, U.S. Army Corps of Engineers and the University of Minnesota Duluth Large Lakes Observatory Web site. Arrival and departure times are not official and can vary widely.

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