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Filter: Subject of Harbors
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| Date: | 1951 |
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| Description: | This map shows Ashland and Washburn harbors in shades of blue and yellow. Water depths shown by isolines and soundings, and relief is shown by contours. Th... |
| Date: | 01 06 1958 |
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| Description: | View of the Ship Canal from the Coast Guard station. There are pieces of machinery on the right, and a line of trees on the left. There is snow on the grou... |
| Date: | 1923 |
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| Description: | This map includes an explanation that reads: "This chart shows the movement of oats on the Great Lakes, St. Lawrence River, and New York State Barge Canal ... |
| Date: | 1907 |
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| Description: | Postcard with two images. The top text reads: "Interstate Bridge, connecting Superior, Wis. and Duluth, Minn." The bottom text reads: "Superior Entry and S... |
| Date: | 06 14 1947 |
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| Description: | Text on front reads: "Opening of Navigation Season, First Giant Freighters Entering Ship Canal and Duluth-Superior Harbor." On reverse: "The navigation sea... |
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