United States. Army. Corps of EngineersSome charts have imprint: Fort Belvoir, Va.: 30th Engineers by reproduction plant, 1943, or Washington, D.C.: Engineer reproduction plant, U.S. Army, 1929.Imprint: Detroit, Michigan : U.S. Lake Survey Office, 1911-1914.Dimensions: size variesJPEGG3707.O5 1911 .U55engU.S. Lake SurveyPublicRiversNavigationOhio River : Pittsburgh, Pa. to mouth in 280 charts and index sheetMapsOhio River1911Indiana University