COLUMN OP/EDMississippi River Ship Channel Deepening Situation Report A plan unfolds and support grows for a 50-foot Ship Channel to support economical and ef? cient grain exports. The Big River Coalition remains at the heart of that collaborative effort to make the Mississippi River Mightier.By Sean DuffyIn 2012, the U.S. Army Corps of 1981 Chief of Engineers Report (Chief’s Report). The orig-Engineers’ (USACE) Institute of Water inal Chief’s Report established the economic justi