 The total cost to complete the Brookville Tunnel amounted to $ 114 @,@ 600 , with a cost per foot , at a length of 869 feet ( 265 m ) , of $ 131 @.@ 90 . By comparison , the cost per foot of the 538 @-@ foot ( 164 m ) Greenwood Tunnel was $ 138 @.@ 30 , the 100 @-@ foot ( 30 m ) Little Rock Tunnel was $ 123 @.@ 90 , and the 4 @,@ 273 @-@ foot ( 1 @,@ 302 m ) Blue Ridge Tunnel was $ 108 @.@ 60 . Costs at the Brookville Tunnel were greatly increased from the expected by the frail and insecure earth encountered , contrary to what originally appeared to be solid rock . Workers , both inside and outside laborers , were paid approximately $ 1 @.@ 12 per day , while miners were paid $ 1 @.@ 37 per day , equivalent to $ 29 @.@ 5 and $ 36 @.@ 08 , respectively , today . 
