Relief shown pictorially. At lower right: "Lith of J. Bien, 60 Fulton St., N.Y." At upper right: "Lt. Warren's Memoir, Plate 1" From Reports of Explorations and Surveys, to Ascertain the Most Practicable and Economical Route for a Railroad From the Mississippi River to the Pacific Ocean. Made Under the Direction of the Secretary of War, In 1853-56, According to Acts of Congress of March 3, 1853, May 31, 1854, and August 5, 1854. Volume XI. Washington: George W. Bowman, Printer. 1861. 36th Congress, 2d Session, Senate, Ex. Doc. 1 map ; 18 x 21 cm This map is in the public domain. Please attribute access and use of this digitized map to the Stephen S. Clark Library, University of Michigan Library.