Morganza Spillway Structure (ORCS), in use since 1963, where floodgates are routinely used to redirect the Mississippi's flow into the Atchafalaya River such that the volume of the two rivers is split 70%/30%, respectively, as measured at the latitude of Red River Landing. During the 1973 Mississippi flood, the ORCS was being damaged due to high flow rates, leading to the opening of the Morganza Spillway to help relieve this pressure. Subsequently, the nearby Old River Control Auxiliary Structure (ORCAS) was constructed, adding additional floodgates for use during major floods. The Morganza Spillway, about downriver from ORCS and ORCAS, is designed for
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