United States"The survey of the river proper was begun July 25, and completed December 31, 1911. The valley survey began January 15, and was completed September 10, 1912. Mapping in 1913." 1 map on 13 sheets, photocopy. "Revisions made July 1931." Depths shown by soundings. Relief shown by contours and spot heights.Scale: Approximately 1:24,000; Dimensions: sheets 92 x 122 cmJPEGVAC3073-M-01258G4072.W3 C315 1931 .U55 no. 1engUnited States. Army. Corps of Engineers. Louisville DistrictPublicRiversWabash River and Valley from Terre Haute, Ind. to mouth, in 13 charts, 1914MapsWabash River1911-1913Indiana University