DUST PREVENTION AND ROAD PRESERVATION, 1916. 
SUMMARY OF COST DATA. 
19 
The cost data for the experiments described above are presented 
in Tables 22 to 24. 
Table 22. — Quantities and costs of materials. 
Quantity in 
work unit. 
Kind of 
material. 
Quantity of 
material. 
Unit cost. 
Total 
cost. 
Item. 
Mate- 
rial 
unit. 
Work 
unit. 
Re- 
marks. 
Foundation re- 
pairs. 
39,377.4 square 
yards. 
50,160 linearfeet. 
38,442.6 square 
yards. 
934.8 square 
yards. 
Gravel (run-of- 
pit). 
do 
150 cubic 
yards. 
2,500 cubic 
yards. 
3,500 cubic 
yards. 
380.66 tons 
98 tons 
365 tons 
85 cubic yards. 
14.35 tons 
$0.05 
.05 
.10 
15.00 
6.00 
1.50 
.10 
15.00 
Cents. 
0.019 
.25 
.91 
14.59 
1.53 
1.42 
.90 
23.02 
$7.50 
125. 00 
350. 00 
5,609.90 
588. 00 
547. 50 
8.50 
215. 25 
514. 67 
Esti- 
mated. 
Do. 
Do. 
Surface, bitu- 
minous gravel 
concrete. 
Surface, earth 
Limestone dust . 
(Pea gravel for 
seal coat. 
fEarth 
Do. 
Do. 
Do. 
oil-asphalt. 
\ Asphalt 
Do. 
Table 23. — Labor cost. 
Item. 
Quantity. 
Operation. 
Labor 
costs. 
Unit 
labor 
costs. 
39,377.4 square yards 
J-38,442.6 square yards 
934.8 square yards 
[Shaping 
$1,758.46 
175.50 
310.31 
Cents. 
4 467 
\ Sprinkling 
.445 
| Rolling.." 
787 
i Hauling asphalt 
2,244.27 
5.699 
547. 75 
5,826.62 
2,553.06 
546. 94 
1,394.37 
295. 81 
506. 50 
299. 26 
1 424 
Mixing 
15. 156 
6 640 
Bituminous gravel con- 
Setting headers 
1.421 
crete surface. 
3.627 
765 
1 315 
lHauling pea gravel 
.777 
11,970.31 
31.125 
231.75 
105. 25 
9.00 
83.56 
24 79 
11.26 
] Setting headers 
.96 
8.93 
(Loosening and loading 
I Hauling 
429. 56 
45.94 
888.84 
1,310.06 
953. 15 
16.00 
1.772 
2.611 
I Spreading 
1.899 
IRolling 
.031 
3,168.05 
6.313 
