▁the ▁r er out ing ▁of ▁the ▁Missouri ▁River , ▁some ▁residents ▁have ▁said ▁it ▁may ▁have ▁contributed . ▁ ▁On ▁July ▁ 5 , ▁ 1 8 6 7 , ▁a ▁little ▁more ▁than ▁four ▁months ▁after ▁Neb r aska ▁entered ▁the ▁union , ▁a ▁flo od ▁av ulsion ▁d ug ▁out ▁the ▁sl ough ▁on ▁the ▁west ▁side ▁of ▁the ▁island , ▁straight ening ▁its ▁flow ▁around ▁the ▁ox bow ▁me ander . ▁The ▁channel ▁separ ating ▁it ▁from ▁main land ▁Neb r aska ▁deep ened ▁following ▁an ▁ 1 8 8 0 s ▁flo od . ▁ ▁In ▁the ▁meant ime , ▁the ▁river bed ▁that ▁had ▁flow ed ▁to ▁the ▁east ▁of ▁the ▁river ▁d ried ▁up , ▁and ▁the ▁land ▁became ▁till able ▁and ▁de ▁fact o ▁connected ▁by ▁land ▁to ▁Missouri , ▁while ▁those ▁from ▁Neb r aska ▁had ▁to ▁access ▁it ▁by ▁fer ry ▁( no ▁brid ges ▁had ▁been ▁built ▁nearby ▁at ▁the ▁time ). ▁ ▁In ▁ 1 8 9 5 ▁the ▁county ▁survey ors ▁of ▁Nem aha ▁County ▁and ▁At ch ison ▁County ▁survey ed ▁the ▁abandoned ▁bed ▁of ▁the ▁Missouri ▁River . ▁ ▁On ▁February ▁ 2 4 , ▁ 1 9 0 4 , ▁Missouri ▁file d ▁a ▁claim ▁with ▁the ▁Supreme ▁Court ▁claim ing ▁juris diction . ▁Neb r aska ▁file d ▁a ▁cross ▁suit . ▁ ▁Missouri ▁argued ▁that ▁when ▁Congress ▁approved ▁the ▁extension ▁of ▁borders ▁under ▁the ▁Pl atte ▁P urchase , ▁the ▁border ▁was ▁to ▁be ▁the