• ROAD MILEAGE, CENTRAL AND WESTERN STATES, 7 



Of the 134,141.74 miles of surfaced roads, at the close of 1914, in the Central, Pacific, 

 and Mountain States, 78,825.34 miles, or 58.77 per cent, were of gravel; 31,882.24 

 miles, or 23.77 per cent, macadam; 13,192.02 miles, or 9.84 per cent, sand-clay; 

 2,949.64 miles, or 2.20 per cent, bituminous macadam; 1,789.20 miles, or 1.33 per cent, 

 concrete; 794.82 miles, or 0.59 per cent, brick; and 4,708.47 miles, or 3.5 per cent, sur- 

 faced with other materials. The distribution of types of surfaced roads as of January 1, 

 1915, is shown by States in Table 6.' 



Table 6. — Distribution of types of surfaced road, 1914- 





Type. 



State. 



Macadam. 



Bitiuni- 

 nous mac- 

 adam. 



Gravel. 



Sand- 

 clay. 



Brick. 



Concrete. 



Miscella^ 

 neous. 



Total. 





11.23 

 837.4 

 3 



42.5 



1.675.11 



10,291.29 



171.3 



194.3 



1,021.19 



120. 25 



1,531.05 



78 



39.21 

 2 



13.5 



877.9 



125.7 

 3,563.59 



574. 25 



168 

 7,052.3 

 20,264.59 



413 



151. 85 

 5,230.25 

 2, 825. 25 

 3,671.5 



614. 25 

 21 



193 



184 



955 

 15,385.93 

 3,060.15 



212 



685. 75 

 3,924.48 

 9,597 

 52.5 



45 



582. 25 



450. 12 



449 



2,467.95 



150. 25 



23 



758.5 



1,375.27 



985. 33 



1,442.25 



14 

 1,131.1 

 67 

 72.5 







58 

 a 3, 489. 4 

 164.25 

 3 

 57.7 



253. 43 



California 



"82." 92' 

 34.75 



■""i"i"" 

 ........ 



1 



929. 19 

 2.25 

 4.5 



148.8 



53.17 



5.77 



1.35 



107.3 

 17.5 

 2.77 



10,279.73 





1, 193. 87 



Idaho 



12 

 121. 53 

 168. 35 



679 



Illinois. 



11,606.31 





30,962.4 





1.5 



38.75 



614. 57 







1,148.85. 



Michigan 



94.5 



19 



59 



7,828.51 



Minnesota . 





3,967.83 



Missouri 



5 

 3 



2 



6,712.57 





609. 25 



Nebraska 



1.3 



2.4 



7.53 



1,204.54 



Nevada . 



262 





5 









261.5 



North Dakota . 











955 



Ohio 



12,903.87 

 1,000.72 



1,066.29 

 137.25 

 10 

 15.5 

 165. 52 

 183 



211 

 300 

 129 

 401 

 83.50 

 2,054 



640.41 



315. 67 

 28.41 



46 



199. 87 

 12 



30,569.17 



Oregon 



4,726.4 



South Dakota 



363 



Utah.. 



49 



502. 82 

 1,408 



■"26."35' 

 2.4 



2.5 



79.42 

 83.07 



1,153.75 

 4,922.09 



Washington 



140 



72 



416 



Wisconsin... 



13,399.47 



Wyoming 



468.5 

















Total 



31, 882. 24 

 23.77 



2,949.64 

 2.2 



78,825.34 

 58.77 



13, 192. 02 



9.84 



794. 82 

 .59 



1,789.20 

 1.33 



4,708.47 

 3.5 



134,141.74 

 100 



Per cent 







a Oiled earth. 



Detailed information regarding sources and amounts of revenues, bonds issued and 

 outstanding, total mileage of roads, and mileage surfaced, systems of administration, 

 and other factors affecting road improvement, is presented under the respective State 

 headings. 



ARIZONA.2 



Arizona has a land area of 113,810 square miles, a total road mileage of 12,075, 

 of which 253.43 miles, or 2.09 per cent, were surfaced at the close of 1914. 



The State engineer is appointed by the governor, by and with the consent of the 

 senate. He is required to be a practical and competent civil engineer, and serves 

 for a term of two years. His duties are to aid the State board of control and the 

 boards of supervisors of the several counties in the selection and designation of State 

 highways and bridges, .which are defined to be all highways and parts of highways 

 and bridges heretofore constructed by the Territory or State of Arizona or that may 

 be built hereafter by the State. The boards of supervisors are required to act with 

 the State engineer in the selection of the highways and bridges to be constructed 



1 The tables referred to hereafter in the text will bfe found in the appendices: Those referring to road 

 mileage are grouped in Appendix A, those referring to revenues expended in Appendix B, and those refer- 

 ring to bond issues in Appendix C. 



" In collecting the information for Arizona assistance was rendered by Lamar Cobb, State engineer, and 

 collaborator of the U. S. Department of Agriculture. 



