Old River Control Structure such that the volume of the two rivers is split 70%/30%, respectively, as measured at the latitude of Red River Landing. This flow split was not based on science, but rather was based on the approximate flow allocation between the two rivers that existed at the time of construction. Water diverted at Old River flows into the Atchafalaya Basin, first entering the Red River, then continuing down the Atchafalaya River to the Gulf of Mexico, bypassing Baton Rouge and New Orleans (see diagram). The Morganza Floodway, between the Mississippi and the Atchafalaya Basin nearby downstream, is normally closed, but can
67th Indiana Infantry Regiment 10-May 22. Advance from Franklin to Alexandria March 14–26. Battle of Sabine Cross Roads April 8. Monett's Ferry, Cane River Crossing, April 23. Constructing dam at Alexandria April 30-May 10. Retreat to Morganza May 13–20. At Morganza and Baton Rouge until August. Operations in Mobile Bay against Forts Gaines and Morgan August 2–23. Siege and surrender of Fort Gaines August 3–8. Capture of Fort Morgan August 23. Duty at Morganza until December. Expedition to mouth of White River November 12–20. The regiment lost a total of 249 men during service; 1 officer and 52 enlisted men killed or mortally wounded,