▁middle ▁of ▁the ▁river ▁( although ▁the ▁border ▁was ▁not ▁survey ed ▁at ▁the ▁time ). ▁Neb r aska ▁argued ▁that ▁its ▁borders ▁were ▁survey ed ▁when ▁it ▁entered ▁the ▁union . ▁ ▁Justice ▁John ▁Marshall ▁Har lan ▁delivered ▁the ▁opinion , ▁saying , ▁" The ▁question ▁is ▁well ▁settled ▁at ▁common ▁law , ▁that ▁the ▁person ▁whose ▁land ▁is ▁bounded ▁by ▁a ▁stream ▁of ▁water , ▁which ▁changes ▁its ▁course ▁gradually ▁by ▁all uv ial ▁form ations , ▁shall ▁still ▁hold ▁by ▁the ▁same ▁boundary , ▁including ▁the ▁accum ulated ▁soil . ▁No ▁other ▁rule ▁can ▁be ▁applied ▁on ▁just ▁principles . ▁Every ▁propriet or ▁whose ▁land ▁is ▁thus ▁bounded ▁is ▁subject ▁to ▁loss ▁by ▁the ▁same ▁means ▁which ▁may ▁add ▁to ▁his ▁territory ; ▁and ▁as ▁he ▁is ▁without ▁rem edy ▁for ▁his ▁loss , ▁in ▁this ▁way , ▁he ▁cannot ▁be ▁held ▁account able ▁for ▁his ▁gain ." ▁ ▁The ▁court ▁told ▁the ▁states ▁to ▁either ▁accept ▁the ▁boundaries ▁survey ed ▁in ▁ 1 8 9 5 ▁or ▁ask ▁for ▁a ▁new ▁survey . ▁ ▁The ▁boundary ▁was ▁not ▁further ▁defined ▁until ▁ 1 9 9 9 ▁when ▁the ▁states ▁agreed ▁to ▁have ▁Mid land ▁Sur ve ying , ▁Inc . ▁conduct ▁the ▁survey . ▁This ▁in ▁turn ▁led ▁to ▁the ▁Missouri - N eb r aska ▁Comp act , ▁which ▁the ▁states ▁and ▁Congress ▁approved ▁in ▁ 1 9 9 9 . ▁ ▁The ▁two ▁closest ▁Missouri ▁River ▁brid ges ▁offering ▁access ▁were ▁built ▁in ▁the ▁ 1 9