1892: Congress establishes a 4-ft. channel on the lower Minnesota River up to mile 25.6
1930: Congress charges Army Corps of Engineers (COE) with dredging and maintaining 9-ft. navigation channels on the upper Mississippi, from St. Louis to Minneapolis
1958: Congress orders deepening of 4-ft channel on the Minnesota to 9 ft. up to mile 14.7, in Savage, where the grain terminals are situated