 In 1972 , four years after the Chicago Great Western was merged into the Chicago and North Western Railway ( C & NW ) , the CGW 's largely redundant trackage in the area , including the Winston Tunnel , was abandoned . It was the third longest railroad tunnel in Illinois at 2 @,@ <unk> feet ( 760 m ) . Two longer ( still active ) tunnels are located on the Canadian National ( ex @-@ Illinois Central ) <unk> <unk> Line , the longest being Tunnel # 2 near Abbot , Illinois which is 6 @,@ <unk> feet ( 2 @,@ 132 m ) long . 
