Morganza Spillway to the protections used to prevent Mississippi River flood. The Flood Control Act of 1965 provided further regulation over the Morganza Spillway's role in Mississippi River flood prevention. A concrete pit called a stilling basin was added at the Morganza Spillway in 1977 "to provide erosion protection after the velocity of water pouring through the open bays during a 1973 flood caused severe scouring of the land behind the bays." The Morganza Spillway, a "controlled" spillway using a set of flood gates to control the volume of water entering the Morganza Floodway from the Mississippi River, consists of a concrete
175th New York Volunteer Infantry 26-30. Siege of Port Hudson May 30-July 9. Assault on Port Hudson June 14. Surrender of Port Hudson July 9. Moved to Baton Rouge July 22, and duty there until March 1864. Operations about St. Martinsville November 12, 1863. Red River Campaign March 23-May 22. At Alexandria March 25-April 12. Cane River April 23-24. At Alexandria April 26-May 13. Retreat to Morganza May 13-20. Mansura May 16. At Morganza until July. Expedition from Morganza to the Atchafalaya May 30-June 5. Atchafalaya River June 1. Moved to Fort Monroe, Va., then to Washington, D.C., July 5-29. Sheridan's Shenandoah Valley Campaign August