United States. Army. Corps of EngineersRelief shown by contours and spot heights. Depths shown by soundings.; Each sheet includes notes and authorities; most sheets contain index map and "water-table."on sheets 80 x 130 centimeters or smallerJPEGUMN_ALMA:9935041000001701engHeadquarters of the Corps of Engineers, War Dept (Washington)PublicSurvey of the Mississippi RiverMapsUnited States1878-1879University of Minnesota