Many federal records pertain to the development and use of waterways in the United States. This lecture shows examples and explains the relevance of some of the applicable records found at the National Archives in Washington, DC, in its online holdings, and at its regional facilities like Chicago, Atlanta, Kansas City, and others. Photos and documents will be examined from diverse NARA record groups; for example, Records of the Office of the Chief of Engineers (RG 77), Records of the Inland Waterways Corporation (RG 91), and Records of the Bureau of Land Management (RG 49). Other examples come from holdings of the Library of Congress Serial Set and map collections. The process for finding these and similar records will also be explained.