Birds Point-New Madrid Floodway by residents and landowners since its inception. After the Great Mississippi Flood of 1927, the engineering policy on the Mississippi River changed from building levees high enough to withstand the greatest recorded flood to include floodways. The Flood Control Act of 1928 authorized the United States Army Corps of Engineers to construct the Birds Point-New Madrid Floodway in Missouri and the Morganza Spillway and Bonnet Carre Spillway in Louisiana. Even before its authorization, the Birds Point-New Madrid Floodway was the subject of controversy. In June 1927, President Calvin Coolidge instructed the Mississippi River Commission and the Corps of Engineers to
Morganza Spillway still open. All bays were closed on July 7, 2011. The Corps had estimated that it would take opening one-fourth of the spillway’s 125 bays — or 31 bays — to control the flow of the river through Baton Rouge in response to a forecast crest of anticipated on Tuesday, May 17, 2011, which must remain below of water per second through Baton Rouge to ensure the integrity of the levee system. Since Morganza never operated above , the flooding in the Atchafalaya Basin was considerably lower than had been anticipated during the initial estimates of . By May 29,