 The operating <unk> of the tunnel , not to mention the millions of dollars the CGW spent to keep it open , forced the railroad 's management to consider many schemes to rid themselves of the burden . In 1909 , 1951 and again in 1964 ( the same year the North Western and Great Western announced their intentions to merge ) the CGW sought engineering proposals to <unk> their trackage around the bore , to daylight the tunnel , or to completely rebuild and improve it . To the often cash @-@ <unk> Great Western , however , all these plans proved far too expensive . 
