Barrier Placement Louisiana National Guardsmen carry a barrier on Avoca Island near Morgan City, La., Jan. 9, 2016. The barriers were used in the construction of a 2-mile long levee to prevent flooding from reaching Morgan City and other towns in southern Louisiana due to high river levels. SHARE: Download: Full Size (0.67 MB) Tags: national guard Credit: Army Spc. Garrett Dipuma VIRIN: 160109-A-YG824-002.JPG Photo Gallery