Report of State Highway Engineer. 55 



forty miles, cost $4,884 per mile. The total con.tract cost for grad- 

 Xfig and rocking being $5,586 per mile. 



The Old trails road is rocked for a distance of seven and one- 

 half miles, three miles west and four and one-half miles east from 

 Lexington. The three miles west was contracted for $6,100 for 

 grading 22,486 cubic yards of earth, and 1,664 cubic yards of rock 

 and $11,220 for rock, or $17,320 total for the three miles. Local 

 rock was used here principally, the contract prices in place and 

 complete being: base, $1.30 per cubic yard for local rock and $1.68 

 per yard for shipped, loose measurement. Top surface, $1.55 per 

 cubic yard for local rock and $1.85 per yard for shipped, loose 

 measurement. 



The four and one-half miles east from Lexington was made 

 entirely of shipped rock at a straight contract price of $2.25 per 

 cubic yard, loose measurement, complete. This cost $6,200 per 

 mile. The grading was 57,400 cubic yards of earth, an average of 

 1,275 yards per mile, at 131/2 cents, or $1,689 per mile. The total 

 cost for grading and rocking being practically $7,900 per mile. 



A section of bituminous bound pavement was put down on a 

 grade too steep on which to hold the water-bound macadam, as 

 follows : 



Grade of section paved 8 per cent. 



Length of section paved 1 , 120 feet. 



Widtla of section paved 30 feet. 



Tliiclcness of base (sledge base, loose measurement) 8 inches. 



Thickness of top course (loose measurement) 2)4 inches. 



Bitumen (Am. asphalt) per sq. yd., 1st pouring 3.03 gals. 



Bitumen (Am. asphalt) per sq. yd., 2nd pouring 0.50 gals. 



Total bitumen per sq. yd 3 . .53 gals. 



Cost of subgrade preparations $0,061 sq. yd. 



Cost of labor (hauling, teams, water, fuel, roller expense, laying 



and finishing) . 540 sq. yd. 



Cost of rock and freight on rock . 589 sq. yd. 



Cost of asphalt ($0,112 per gal.) 0.396 sq. yd. 



Cost of incidentals . 004 sq. yd. 



Total $1 . 590 sq. yd. 



Rate per mile, 15-foot road $13 , 992 . 00 



MARION COUNTY. 



The county of Marion was selected for this report because it 

 is doing good work as a county unit under the strict supervision of 

 a county highway engineer, and is not broken up into small units 

 and is unhampered by townships or special districts. Marion coun- 

 ty topography, soil and climate are characteristic of our river 

 counties. The soil is a productive limestone soil, the topography 



