Louisiana State Route 7 the Morganza Spillway in the same way that LA 1 was split in half with the opening of the Bonnet Carre Spillway. LA 7 followed the railroad to Livonia, where it met LA 1 and the two were paired to Port Allen. After crossing the Mississippi River in Port Allen, LA 1 turned to the south in Baton Rouge, while LA 7 picked up US 61 and US 190. US 61 split from LA 7 at a traffic circle, with LA 7 carrying US 190 through the Florida Parishes. US 190 was split from LA 7 in Hammond, where LA
6th Missouri Volunteer Cavalry May 18-July 4. Assaults on Vicksburg May 19 and 22. Mason's Ford. Big Black River, June 9. Advance on Jackson, Miss., July 4–10. Near Baker's Creek July 7. Bolton's Station July 8 (detachment). Near Clinton July 8 (detachment). Near Jackson and near Clinton July 9 (detachment). Siege of Jackson July 10–17. Brookhaven July 18 (detachment). Near Morganza, La., September 8. Atchafalaya September 8–9. Hornersville, Mo., September 20 (2nd Battalion). Sterling's Farm, on Bayou Fordoche, near Morganza, September 27. Western Louisiana Campaign October 3-November 30. Reconnaissance toward Opelousas October 20. Opelousas, Barre Landing, October 21. Washington October 24. Bayou Bourbeaux November