Maritime History of the Great Lakes

Green's Marine Directory of the Great Lakes, 1940, p. 70

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NORTH END OF PORTAGE CANAL Photo by Chicago Aerial Survey This waterway, formally designated the Portage Lake and Lake Superior Canals, is about 25 miles in length, crossing Keweenaw Peninsula from Keweenaw Bay on the southeast side, to the open lake on the northwest side, and on it 1s situated the cities of Houghton and Hancock, Mich., and the famous copper mine of Calumet & Hecla Copper Co. This photo shows the new improvements made in the last two years. 70 @

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