▁move ▁its ▁tracks ▁closer ▁to ▁the ▁river bank , ▁and ▁the ▁federal ▁government ▁paid ▁for ▁the ▁move . ▁However , ▁this ▁required ▁that ▁a ▁second ▁over land ▁span ▁be ▁created ▁on ▁the ▁north western ▁side ▁of ▁the ▁bridge ▁at ▁an ▁additional ▁cost . ▁Colonel ▁Peter ▁Con over ▁H ains ▁of ▁the ▁Army ▁Corps ▁of ▁Engine ers ▁asked ▁for ▁an ▁additional ▁sum ▁of ▁$ 5 0 , 0 0 0 ▁in ▁ 1 8 8 8 . ▁Legisl ation ▁spons ored ▁by ▁Represent ative ▁Row ell ▁increased ▁this ▁amount ▁to ▁$ 6 0 , 0 0 0 , ▁and ▁the ▁legisl ation ▁passed ▁both ▁houses ▁of ▁Congress ▁un anim ously ▁on ▁May ▁ 1 4 , ▁ 1 8 8 8 . ▁But ▁yet ▁more ▁construction ▁del ays ▁occurred . ▁Due ▁to ▁the ▁heavily ▁s ilt ed ▁bottom ▁of ▁the ▁river , ▁the ▁Army ▁Corps ▁of ▁Engine ers ▁could ▁not ▁find ▁solid ▁ground ▁on ▁which ▁to ▁build ▁the ▁bridge ' s ▁pi ers ▁and ▁ab ut ments . ▁A ▁c of fer dam ▁was ▁constructed ▁and ▁extensive ▁exc av ation ▁and ▁investigation ▁of ▁the ▁river bed ▁occurred ▁before ▁the ▁second ▁ab ut ment ▁on ▁the ▁north western ▁side ▁could ▁be ▁s ited . ▁The ▁river bottom ▁also ▁played ▁hav oc ▁with ▁sit ing ▁and ▁s inking ▁of ▁the ▁pi ers ▁for ▁the ▁bridge . ▁A ▁major ▁flo od ▁in ▁ 1 8 8 8 ▁dam aged ▁some ▁of ▁the ▁work , ▁and ▁caused ▁further ▁del ays . ▁On ▁May ▁ 2 1 , ▁