DUST PREVENTION" AND ROAD PRESERVATION, 1914. 43 



SUPPLEMENTARY REPORT OF EXPERIMENTS MADE AT GARDEN CITY, 

 DODGE CITY, BUCKLIN, AND FORD, KANS., 1908. 



SAND-CLAY. 



The original report of these experiments was published in Circular 

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

 92, 94, 98, and 99, Office of Public Koads, and in U. S. Department 

 of Agriculture Bulletin No. 105. The following are reports of 

 inspections made in 1914: 



Experiment at Garden City. 



This road was inspected November 10, 1914, and wheat hauling 

 with 4-horse teams was in progress at that time. There had been 

 practically no rain since June, but the road had not deteriorated 

 seriously. 



There are no unrepaired holes. On the day of inspection 12 small 

 holes and depressions were filled with fresh clay. There are five 

 depressions varying from 2 feet square to 5 feet square which should 

 be filled with clay before they are cut through. 



The entire section has gradually flattened and should be reshaped. 

 There are long wide ruts from one-half to three-fourths inch deep 

 and the entire surface is finely pitted. It is not so rough, however, 

 as to make riding uncomfortable. 



The road is being maintained by dragging and by filling worn 

 places in the manner indicated. 



Experiments at Dodge City. 



This road was inspected November 10, 1914. There had been no 

 rain in this vicinity for some time and the soil was very dry. Wheat 

 was being hauled to market, and the road was in such poor condition 

 that the traffic from a large territory used a roadway 1 mile east of 

 this. 



About two-fifths of the sand-clay surface was broken through, and 

 the sand from below had come to the surface. The failuro had 

 taken place over irregular areas. In some places it was confined to 

 the rut or to the middle half of the road. There were occasional 

 stretches 30 or 40 feet long that were in excellent condition. Con- 

 sequently, the surface was so irregular and so deeply cut that traffic 

 Was confined to the ditches entirely. 



The failure was no doubt largely due to the fact that the road had 



uot been properly dragged after the heavy spring rains, and the weak 



es developed at that time were worn through by the heavy 



traffic during the long droughl of the ensuing summer and autumn. 



The road is now beyond repair, and reconstruction is necessary . 



