this is a large paper print which has come out of a quality publication titled engineering which is dated 1910 . the print is titled " the mccall ferry hydro-electric station on the susquehanna river " this measures 14" -- 9.5" and shows the distant view of the dam showing gaps afterwards filled with concrete and the general view of the power house during construction ! their are also more illustrations on the back and this is in good condition ! i have many more historical prints you can view in my ebay shop !