KOAD MILEAGE, CENTKAL AND WESTERN STATES. 45 
Bonds may be issued by any county for road construction when authorized by the 
favorable vote of a majority of those voting at an election thereon. Such bonds are 
limited in amount not to exceed 2 per cent of the assessed valuation of the county. 
The net proceeds from the licensing and registration of motor vehicles is returned 
to the several counties in proportion to the amount collected in each county and 
applied to road purposes. 
Both State and county convicts may be used on the public roads. 
ROAD MILEAGE. 
At the close of 1914 Oregon had a total of 36,819 miles of public roads, of which 
4,716.40 miles, or 12.81 per cent, were surfaced. Of the surfaced roads 1,000.72 miles 
were macadam, 137.25 miles bituminous macadam, 3,060.15 miles gravel, 179.50 plank, 
300 sand-clay, 28.41 concrete, 10 volcanic cinders, and 0.37 wood block. There were 
also reported 4,718.75 miles of graded and drained earth road. The total of all public 
roads in 1909 was 29,475 miles, of which 2,799.25 miles, or 9.49 per cent, were surfaced, 
an increase in surfaced mileage in the five-year period of 1,917. 85 miles. Detailed 
information regarding road mileage for 1914 is presented by counties in Table 24. 
REVENUES APPLIED TO ROADS AND BRIDGES. 
The total revenue applied to roads and bridges in 1914 amounted to $5,310,466.76. 
Of this $3,259,245.59 was derived from the general county tax, $679,832.92 from other 
sources, $1,122,817.65 was expended from county bond issue funds, $238,570.60 was 
obtained from the State road tax, and $10,000 was appropriated by the State for salary, 
office and field expenses of the State engineer. Of the amount obtained from other 
sources $59,761.18 was derived from motor license fees and applied to county roads. 
The total revenue applied to roads and bridges in 1904 amounted to $796,375.97, an 
increase for the 10-year period of $4,514,090. 79, or 566.84 per cent. Detailed infor- 
mation on this subject is presented by counties in Table 47. 
ROAD AND BRIDGE BONDS. 
The total county road and bridge bonds outstanding January 1, 1915, amounted to 
$1,615,000, of which $1,122,817.65 was expended in 1914. In the same year $1,365,000 
was voted and sold. No State road bonds have been issued. Information regarding 
road and bridge bonds is presented by counties in Table 66. 
SOUTH DAKOTA. 1 
South Dakota has a land area of 76,868 aquare miles, and a total road mileage of 
96,306, of which 363 miles, or 0.37 per cent, were surfaced at the close of 1914. 
There is a State highway commission composed of three members, one from each 
congressional district, appointed by the governor-. The work of the commission is 
of an advisory nature. Any county board may designate any established road or 
specified portion in its county as a State road, subject to the approval of the commis- 
sion, and may construct or improve it in accordance with the regulations of the 
commission. 
Each organized county of the State has a board of county commissioners. In 
counties not formed into townships, the board of county commissioners is required 
to divide the county annually into one or more road districts and appoint a road 
supervisor for each district. Each road supervisor has charge of highway and bridge 
work in his district, subject to the supervision and direction of the county commis- 
sioners. 
Every road located by State or county authorities is a county road. The county 
commissioners have general supervision of county roads and have power to appro- 
i In collecting the information for South Dakota, assistance was rendered by Homer M. Derr, State 
engineer, and collaborator of the U. S. Department of Agriculture. 
