摘要: |
The Memphis Engineer District's new bank grader, Grader 1, is already hard at work helping to provide river-bank stabilization. Delivered to Memphis in April and christened in May, Grader 1 works with the Vicksburg District's Mat-Sinking Unit in revetment operations, stabilizing the banks of the Lower Mississippi River by the placement of articulated concrete mats from the beginning of the angled edge to the bank's "toe," where it begins to flatten out on the bottom (see WJ, May 1). Revetment operations assist with both navigation and flood mitigation. Without the revetment work and the regional channel improvement project-through which the Memphis, Vicksburg and New Orleans districts work together-over time the Mississippi would cut a new course, changing the channel and potentially damaging levees that protect communities. |