DUST PREVENTION AND ROAD PRESERVATION, 1916. 
19 
SUMMARY OF COST DATA. 
The cost data for the experiments described above are presented 
in Tables 22 to 24. 
TABLE 22.—Quantities and costs of materials. 
Unit cost. 
ior Quantity in Kind of Quantity of Total Re- 
ns work unit. material. material. Bele Work | Cost. | marks 
Tia : 
unit, | Unit. 
Cents 
Foundation re- | 39,377.4 square | Gravel (run-of-| 150 cubic] $0.05] 0.019] $7.50) Esti- 
pairs. yards. pit). yards. \ mated. 
Shoulders. ....--| 50,160 linear-feet.|..... GOeese eee 2,500 pe ubic 05 -25 | 125.00 Do. 
yards. 
et as Graveliss-sesce- 3,500 he ubie -10} _.91 | 350.00 Do. 
face itu- yards. 
minous gravel ore square 1) 4 sphalt.......-- 380.66 tons....} 15.00 | 14.59 [5,609.90 | Asbilled. 
concrete. yates. Limestone dust.] 98tons........| 6.00] 1.53 | 588.00] Do. 
Pea gravel for | 365tons......- 1.50] 1.42 | 547.50 Do. 
seal coat. 
Surface, earth | 934.8 square irae BODOSeSase 85 cubic yards. -10 -90 8.50 Do. 
oil-asphalt yards. Asphalt......... 14.35 tons... .. 15.00 | 23.02 | 215.25 Do. 
Phra WOPK cs. aio. 2-.-2-+--5-=-~- Alling torialseee: 3: DCS eae ee asa eee sacs | te aeons TANG Tp eee sees 
TaBLe 23.—Labor cost. 
Unit 
Item. Quantity. Operation. Tahoe labor 
; costs 
: Cents. 
Slapine eeneseee eee eseece $1, 758. 46 4. 467 
Houndaonl.-..+.----- 42255 39,377.4 square yards. ....- Spout ie eee eee ssece 175.50 -445 
Sil |Rolling:- a teecen seas cae oe 310.31 . 787 
2,244.27 5.699 
Hauling asphalt.....:..... 547.75 1.424 
Maxin geen ede tere saee ae 5, 826. 62 15. 156 
sence ; an at aia bik 2.278, 06 6. 640 
ituminous gravel con- etting headers....-...... 46.9 1.421 
crete surface. \38,442.6 square yards------ Spreading mix............ 1,394.37 3.627 
: Iso) MMs Se eo cc coo secre 295. 81 - 765 
BSealitigwe taste ens snes 506. 50 1.315 
Hauling pea gravel.-...... 299.26 -777 
11,970.31 31. 125 
eee mee | HB 
P ULI OA ene eae ete ee 5. 1.26 
Earth oil-asphalt surface....| 934.8 square yards......... Setting headers... ....... 9.00 06 
SPLeagin ey ees nceee nee. 83. 56 8.93 
429. 56 45.94 
Toosening and loading....| 888. se 1.772 
: a Peis Peo ba eels 1,310. 06 2.611 
Gravelshoulders..........- 50,160 linear feet........... Spreading................. 953. 15 1.899 
ROLing Seeger a ecn nny: 16.00 .031 
3, 168.05 6.313 
