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The U.S. government scrambled to shore up the levee system in the Deep South on Thursday to prevent the mighty Mississippi Rivers from overflowing and flooding populated areas.

The Army Corps of Engineers placed high-density plastic sheeting along a four-mile back section of the Yazoo Backwater levee, to keep it from eroding if the levee is overtopped, said Kavenaugh Breazeale, spokesman for the agency responsible for flood control.

"That's the biggest monster to a levee -- erosion," said Breazeale. The Yazoo Backwater levee is designed to hold back the Yazoo River and the Mississippi from flowing into the south Delta, he said. If there were no levee, up to 2 million acres of land would be flooded, Breazeale explained.

The Corps also is preparing to open the Morganza Spillway in Louisiana this weekend to prevent massive flooding in New Orleans. Morganza has only been opened once before in 1973. But without opening the spillway, experts forecast low-lying New Orleans coul,35188,60403,50404,36606,36212,31929,65447,29040,84167,32181,48867,86229,42589,76197,29159,92949,13010,87172,41651,52500,54645,37690,89948,91045,18878,70546,79209,62794,61516,13811,95302,57211,87272,43613,84913,99473,97388,45539,89549,77250,46621,70336,33241,21439,19031,51804,98486,99672,50529,36061,77976,96177,32884,38326,73332,97376,82629,50710,76841,36947,32901,58554,17490,66255,41291,15049,54570,43627,84695,86307,44121,74067,76564,98589,96687,30181,95415,92182,36672,99542,90091,67158,57933,24140,46358,47485,53459,70679,95613,23488,32733,40245,25222,88208,25790,50026,53167,24766,56885,96730,97100,44494,62593,63142,69295,88380,16143,43963,75604,34000,13739,13109,65051,86612,93815,81194,30889,80298,25532,46472,89813,99626,88576,25438,63447,86774,65959,63340,10436,62742,79850,16643,89838,54622,90855,49338,89340,56788,36342,45213,92662,47119,65120,68550,99292,55188,48920,95242,38271,73620,64036,11077,21465,46987,40890,91787,76978,37065,11951,28946,30668,35743,68725,18747,34703,16659,31642,85649,17191,31843,97570,88011,84257,44687,23838,43141,38641,94765,97269,66175,75191,83328,66211,76534,80373,56615,53231,76842,16028,92423,13515,51534,32543,55319,95407,40160,93224,93239,61577,68318,70030,59323,43623,40982,92677,16911,44909,24212,35288,50702,25095,33315,59508,48409,62894,43265,69467,76737,90953,71652,40547,83831,59591,68238,77157,46055,26194,59402,96536,81897,50030,13824,49497,49393,78388,75141,29542,22394,63617,39510,78473,75474,78218,41888,43329,15638,94392,39650,30980,54472,55065,19236,96056,21252,55003,45142,51823,42416,61920,61777,67875,38151,72023,84798,92593,16086,91149,79847,46763,49654,34452,27812,85231,63969,24745,56627,53389,64168,56463,71010,82389,11880,89059,91693,16970,20948,85192,80735,65481,21964,22622,68564,35706,10451,33576,74541,88873,14323,70812,34476,45364,58756,72366,21266,48690,89667,87845,80761,21621,34578,28461,54138,72871,50482,25106,26011,85313,58830,63076,66632,90946,85017,62757,20566,30620,64503,43144,86442,84474,43310,97476,28130,33557,46818,69550,16737,18149,89633,73158,59209,63863,68658,39192,89237,72804,61992,74823,66433,62937,59310,23363,45064,21702,64092,28240,51955,18904,45652,69877,68268,63318,49871,48482,57177,52433,66480,46102,53644,22485,84048,79777,21590,94904,59173,11748,58505,81587,80765,39033,73639,42875,70360,79366,99647,43694,28872,98623,60725,91268,32811,64604,68159,88626,27388,81609,17970,12828,62126,60328,81353,24666,34408,50172,89916,95566,26714,91411,87727,29068,26478,27360,32077,70166,58622,74827,95515,94992,24159,88696,72988,65409,23038,46678,73556,15533,74181,67915,38765,51840,93398,49933,58368,17637,48734,89236,96288,91521,72103,25347,73274,39031,39273,56748,74254,89211,19891,17677,59792,89187,68754,92706,18849,90324,90555,95470,44470,86050,61749,37837,42403,28099,53988,41628,81110,48007,80815,19089,46191,84404,82115,91345,32386,41865,61729,50306,95189,28543,73804,69941,21442,65569,77281,28649,85163,73228,16751,87132,87280,92841,51856,42813,66735,60788,27361,54981,97752,95517,77254,10937,69994