DEAINAGE METHODS FOR COUNTY ROADS. 61 



with 40 per cent dynamite, fired by means of batteries, and tiie 

 rock was hauled to the charging platform in dump carts. A 25- 

 horsepower engine and a No. 4-|- crusher were used. The record out- 

 put was 183| cubic yards in one day of 14 hours. The bins were of 

 70 cubic yards capacity with three subdivisions. The scale of wages 

 was : 



Superintendent per clay $4. 50 



Timekeeper do 2. 00 



Quarry foreman .' per hour . 20 



f . 171 



Drill runners do i 2 



Crusher feeders do . 17-1 



Crusher engineman do . 25 



Powder man ^ do . 16 



Unskilled labor do . 15 



05 



Water boy do , 



Cart and driver__ do .25 



The items of cost were : 



Labor : 



Superintendence $128. 10 



Stripping 219. 03 



Drilling and blasting 412. 57 



Sledging ^' 798. 31 



Hauling to and charging crusher 1, 306. 38 



Crushing and screening 326. 74 



Repairs to crusher 42. 80 



Sharpening steel and small tools 214. 03 



Materials : 



Coal ; 89.45 



Oil , 11. 20 



Dynamite, caps, and fuse 261. 10 



Repairs to crusher 48. 70 



Small tools 64. 70 



Finance : 



Interest on investment, depreciation, etc 475. 85 



Total 4, 398. 46 



Total stone quarried and crushed cubic yards 4,932.3 



Cost per cubic yard for quarrying and crushing $0. 80 



The cost of quarrying and crushing will average at least 25 per cent 

 higher for trap or granite than for limestone where the quarry con- 

 ditions are similar. 



The largest producers of crushed trap seldom can afford to sell 

 their product at less than about 65 cents per ton or 85 cents per cubic 

 yard, f. o. b. plant, and where the stone is quarried in small quanti- 

 ties the actual cost may greatly exceed those figures. For example, 

 nine small trap and granite quarries in the State of Maine, operated 



