1 8 , ▁ 1 8 8 1 ) ▁January ▁ 1 , ▁ 1 8 7 3 : ▁Jefferson ville , ▁Mad ison ▁and ▁Indian apolis ▁Rail road ▁( mer ged ▁into ▁the ▁Pitts burgh , ▁C inc inn ati , ▁Chicago ▁and ▁St . ▁Louis ▁Railway , ▁PR R - owned ▁but ▁not ▁Pennsylvania ▁Company ▁operated , ▁October ▁ 1 , ▁ 1 8 9 0 ) ▁January ▁ 1 , ▁ 1 8 7 3 : ▁Lake ▁Er ie ▁and ▁Louis ville ▁Rail road ▁( mer ged ▁into ▁the ▁J M & I ▁June ▁ 2 6 , ▁ 1 8 9 0 ) ▁January ▁ 1 , ▁ 1 8 7 3 : ▁Louis ville ▁Bridge ▁Company ▁( beg an ▁operating ▁itself ▁October ▁ 1 , ▁ 1 8 9 0 ) ▁January ▁ 1 , ▁ 1 8 7 3 : ▁Sh el by ▁and ▁R ush ▁Rail road ▁( mer ged ▁into ▁the ▁J M & I ▁April ▁ 1 0 , ▁ 1 8 8 2 ) ▁May ▁ 1 , ▁ 1 8 7 3 : ▁As ht ab ula , ▁Young st own ▁and ▁Pitts burg ▁Rail ▁Road ; ▁As ht ab ula ▁and ▁Pitts burgh ▁Railway ▁( mer ged ▁into ▁the ▁AN & Y ▁June ▁ 1 6 , ▁ 1 8 8 7 ) ▁May ▁ 1 , ▁ 1 8 7 3 : ▁Mans field , ▁Cold water ▁and ▁Lake ▁Michigan ▁Rail ▁Road ▁( mer ged ▁into ▁the ▁N W O