Morganza Spillway in 1954, the Morganza Spillway has been opened twice (in 1973 and 2011), and considered for opening during four other major floods of the Lower Mississippi River. On April 17, 1973, in order to lower the water level of the Mississippi River and relieve pressure on the Old River Control Structure, the Corps of Engineers opened 42 of the 125 steel gates of the Morganza Spillway for the first time since its completion, allowing about half of its maximum designed flowrate to pass from the Mississippi into the Atchafalaya Basin. The spillway received minor scouring and slight damage to the
114th New York Volunteer Infantry Algiers, then to Berwick September 17. Western Louisiana Campaign October 3-November 30. At New Iberia November 17, 1863 to January 8, 1864. Moved to Franklin January 8-10, and duty there until March 15. Red River Campaign March 15-May 22. Advance from Franklin to Alexandria April 15-26. Battle of Sabine Cross Roads April 8. Pleasant Hill April 9. Monett's Ferry or Cane River Crossing April 23. Construction of dam at Alexandria April 30-May 10. Retreat to Morganza May 13-22. Mansura May 16. At Morganza until July 1. Moved to Fort Monroe, Va., then to Washington, D.C., July 1-12. Repulse of Early's