DUST PREVENTION AND ROAD PRESERVATION. . 45 



was found to be in fairly good condition. The part at the north 

 end, and especially the high part that forms the approach to the 

 bridge over the Arkansas River, was smooth and free from ruts, 

 owing to more rapid drainage. The balance of the course was 

 rutted to some extent, because of an unusual amount of rain and 

 traffic, and had frozen solid the night before inspection. The width, 

 grade, cross section, and slope were uniform. No new material has 

 been added this year and proper attention to maintenance has been 

 accomplished by dragging. 



Experiment at Fokd. 



The Spearville Road at Ford, Kans., was inspected on December 20, 

 and found to be in good condition with the exceptions noted. The 

 16-foot width of surfacing was uniform as to slope, grade, and crown 

 throughout the entire length of 350 feet, and showed no evidence of 

 failure to carry the traffic, except slight ruts and hoof marks, which 

 were due to the fact that recent rams had softened the surface of the 

 roadway to a depth of about 1 inch. The road is high and well 

 drained in every way, and gave evidence of "standing up" very well 

 under climatic conditions and traffic. It has been maintained at a 

 very low cost by the use of the split-log drag. 



SUPPLEMENTARY REPORT OF EXPERIMENT MADE AT INDEPENDENCE, 



KANS., 1908. 



OIL-ASPHALT EARTH ROAD. 



The original report of this experiment was published in Circular 

 No. 90, and reports of annual inspections are given in Circulars Nos. 

 92, 94, 98, and 99. The following report is based upon an inspection 

 made December 22, 1913. 



The inspection was made under unfaworable conditions, as the 

 ground was covered with snow from 2 to 3 inches deep and conclu- 

 sions are largely based on information received in the light of reports. 

 The part known as Tonopah Drive is now really an earth road, and 

 was worked into condition about two months ago. It carries a 

 mixed traffic with a maximum load of 6,000 pounds, and has devel- 

 oped ruts along the" center, while the sides are fairly smooth. The 

 ditches are well cleaned out and in good order, and the road has a 

 good crown and uniform cross section. The part known as Minne- 

 haha Street was also worked over along with Tonopah Drive and is 

 in good condition with the exception of incipient ruts. The founda- 

 tion, material, and drainage are much better than on Tonopah Drive 

 and show very few signs of failure from climatic conditions or traffic. 

 No attempt has been made to add more asphalt binder and to bring 

 the road into its original condition as first constructed. 



