Date of image unknown. Photo can date from no earlier than 1964, when the dock conveyor system was constructed. May date from the early years of the operation. Photo can date from no later than 1981, when construction began on additional ore dock shiploader equipment as well as the Richard I. Bong Bridge further upriver. Both of those items would be visible if this photo was taken after 1981 . Date of upload January 24, 2008
Источник
United States Environmental Protection Agency - Great Lakes National Program Office image collection. The images were (quoting from the "about" page) developed as a Cooperative Agreement project with Minnesota Sea Grant. A collection originally called Visualizing the Great Lakes - Images of a Region was the starting point for the EPA GLNPO collection these images are sourced from.
This particular image was found on the "industry" page of the collection.
The Great Lakes image collection is in the public domain and CANNOT be copyrighted.
Although at present, no fee is charged for using the photos credit MUST be given to the United States Environmental Protection Agency Great Lakes National Program office.
== Summary == {{Information |Description=The DMIRw:ore dock at the Duluth-Superior harbor in Duluth, Minnesota. Visible in the picture are a [[w:Lake frei
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