296 FARM DEVELOPMENT 



The estimated cost per square yard, therefore, when computed 

 on the basis of this table, would be about 8 cents, or at the rate 

 of $573.40 per mile. 



The cost of building a sand-clay road on a clay foundation 

 would not vary much from the figures given above. The latter 

 form of construction would probably be slightly cheaper by reason 

 of the fact that sand can be more economically handled than clay. 



The cost of sand-clay construction in the south has been found 

 to vary from $200 to $1,200 per mile, in most cases running from 

 $300 to $800. A sand-clay road constructed under the direction 

 of the Office of Public Roads, at Gainesville, Fla., 1 mile in length, 

 14 feet wide, and having a 9-inch sand-clay surface, cost $881.25 



Eer mile, or 10 cents per square yard. Another sand-clay road, 

 uilt under the direction of the Office at Tallahassee, Fla., 16 feet 

 wide and surfaced with about seven inches of sand-clay mixture, 

 cost $470 per mile, or about 5 cents per square yard. In case 

 changes of grade have to be made with consequent cuts and fills, 

 the cost would be proportionately greater than the figures given 

 above. 



COST OF GRADING 



In making plans and specifications for a road, the cost 01 re- 

 location or the cost of grading the old road will have to be con- 

 sidered. The amount of earth to be moved should be determined 

 by the engineer in charge and the approximate cost per square 

 yard ascertained on a basis of length of haul, kind of material 

 to be moved and cost of loading and unloading. 



If the drag or slush scraper is to be used (average capacity 

 cubic yard) the average cost of moving earth, according to Gil- 

 lette, would be about 4 cents per cubic yard per 100 feet. To 

 this cost Gillette adds 6J cents per cubic yard for loading and 

 unloading, plowing, etc. According to this estimate the cost for 

 moving earth, say 300 feet with drag scrapers, would be about 

 20 cents per cubic yard. 



Where No. 2 wheel scrapers are to be used (capacity about J of 

 a cubic yard), the cost, according to Gillette, would be about 

 2\ cents per cubic yard per 100 feet. To this cost he adds 6J 

 cents per cubic yard for loading and unloading, plowing, etc., 

 For moving earth 300 feet with No. 2 wheel scrapers, the cost 

 would, therefore be about 13 cents per cubic yard. 



The cost of moving earth by wagon when the average load is 

 1 cubic yard, is given by Gillette, as \ cent per cubic yard per 

 100 feet, wages of man and team being estimated on the basis 

 of 35 cents per hour. To this he adds a fixed charge of 13 cents 

 per cubic yard for loading, and 5 cents per cubic yard for plowing. 

 The cost for moving earth on this basis, by wagons, would be 19 

 cents per cubic yard for 300 feet; or 28 cents per cubic yard per 

 mile. 



