COST OF HYDRO-ELECTRIC POWER PLANTS 727 



The concrete lining of the tunnel called for the placing of 

 18,966 cubic yards of concrete, the unit cost of the lining being: 



Labor $5.061 



Cement 1 .970 



Miscellaneous materials . 405 



Lumber . 136 



Freight 0.065 



Transportation . 155 



Liability insurance . 165 



Royalty on mixers . 413 



Miscellaneous cost . 245 



Crushing stone 1 . 991 



Quarrying stone . 858 



Plasterers 0.202 



Cleaning tunnel . 376 



Total $12.042 



The entire tunnel was grouted with grout consisting of one 

 part cement to one and one-half parts sand. The cost of the 

 grouting was $1,436 per cubic yard of concrete lining, made up of 

 the following unit figures: 



The following figures give the approximate total cost of the 

 tunnel per linear foot: 



Excavation $44.44 



Concrete lining 34 . 20 



Grouting 4 . 08 



Adits and shafts 1 .91 



Compressor plants, spur tracks and operation 8 . 99 



Steel forms.. 2.94 



Total . $96.56 



