Nathaniel Henry Hutton

[3] Hutton was U. S. Assistant Engineer on explorations for the Pacific Railroad Surveys west of the Missouri River, on the 32nd and 35th parallels, from 1853 to 1856, including surveys for a route from Fort Smith via Albuquerque and the Colorado River to Los Angeles in 1853 and for a route from Benicia, California, to Fort Fillmore (now in New Mexico) in 1854–55.

[3][4] For the Department of the Interior, Hutton served as chief engineer of the El Paso and Fort Yuma wagon road in 1857 and 1858 (the southerly or "Oxbow Route" used by the Butterfield Overland Mail from 1858 until June 1861), and as surveyor on the western boundary of Minnesota in 1859 and 1860.

[3][5] During the Civil War, Hutton served as U. S. Assistant Engineer on the Union defenses of Baltimore (1861–1865), achieving the rank of Major.

Following the cessation of hostilities, he served as U. S. Assistant Engineer in charge of the improvement of the Patapsco River (1867 to 1876) and on the Western division of the Virginia Central Water Line (surveyed 1874–1875).

[9] A collection of documents relating to his work with the Baltimore Harbor Board and other papers is housed as MS.1323 (40 items, 1876–1877) by the Maryland Historical Society.