Morganza Spillway enters the Morganza Floodway, which extends from the spillway at the Mississippi River south to the East Atchafalaya River levee. The floodway, long and wide, includes a stilling basin, an approach channel, an outlet channel, and two guide levees. From there, diverted water enters the Atchafalaya River Basin Floodway near Krotz Springs, Louisiana, and continues to the Gulf of Mexico. In an extreme flood event, a major release of water from the Morganza Spillway into the Morganza Floodway and Atchafalaya Basin inundates not only the floodways themselves (between their levees), but extensive additional areas of southern Louisiana throughout the Atchafalaya
3rd Missouri Regiment of Colored Infantry Gulf, to September 1864. 2nd Brigade, 1st Division, United States Colored Troops, District of Morganza, Dept. of the Gulf, to February 1865. 1st Brigade, 1st Division, United States Colored Troops, District of Morganza, Dept. of the Gulf, to May 1865. Northern District of Louisiana, Dept. of the Gulf, to July 1865. Moved from Benton Barracks, Missouri, to Port Hudson, Louisiana, arriving March 19, 1864, and duty there till June. Moved to Morganza, Louisiana, and duty there till June 1865. Action at Mt. Pleasant Landing, Louisiana, May 15, 1864 (Detachment). Expedition from Morganza to Bayou Sara September 6–7, 1864. Moved to