File:Photographic copy of photograph (January 1917; original print in possession of MacArthur Coffin, Burlington, Iowa). SUPERSTRUCTURAL ERECTION ON WEST CANTILEVER ARM OF BRIDGE. HAER IOWA,29-BURL,7-56.tif
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![File:Photographic copy of photograph (January 1917; original print in possession of MacArthur Coffin, Burlington, Iowa). SUPERSTRUCTURAL ERECTION ON WEST CANTILEVER ARM OF BRIDGE. HAER IOWA,29-BURL,7-56.tif](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Photographic_copy_of_photograph_%28January_1917%3B_original_print_in_possession_of_MacArthur_Coffin%2C_Burlington%2C_Iowa%29._SUPERSTRUCTURAL_ERECTION_ON_WEST_CANTILEVER_ARM_OF_BRIDGE._HAER_IOWA%2C29-BURL%2C7-56.tif/lossy-page1-749px-thumbnail.tif.jpg?20140713192200)
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