•
Chesapeake and Ohio Canal (1824–): Early Board priority under the Act; Army engineers organized route examinations and estimates for a Potomac–Cumberland line. •
Roanoke–James–Kanawha corridor (1826): Under War Department instructions to the Board of Engineers, officers examined whether a canal or a railway would better connect the waters along this corridor—a comparative study undertaken within the Act's survey program. The statute itself named only “roads and canals”; treating railways as a form of “road” in such surveys reflected administrative practice, not a change to the law. Contemporary Michigan references also note an 1824 congressional appropriation “for a survey of the Great Sauk Trail (now U.S. 12)” with an additional appropriation in 1825. Commerce and the mail soon traveled much faster on what was called the
Chicago Road. •
Baltimore and Ohio Railroad assistance (1827–1830): On military grounds, War Secretary
James Barbour detailed Army Engineer and Topographical officers to the railroad to help survey and organize the line. == Administration and scope ==