United States. Army Corps of Topographical Engineers Emory, William Helmsley Abert, James William Cooke, Philip St. George (1809-1895) Johnston, Abraham Robinson (1815?-1846) 1848
United States. Army Corps of Engineers Jones, William Albert (1841-1914) Blunt, Stanhope English (1850-1926) Comstock, Theodore Bryant (1849-1915) Heizmann, Charles Lawrence (1846-) Parry, Charles Christopher (1823-1890) Putnam, Joseph Duncan (1855-1881) 1875