1915. 71 
The unsatisfactory condition of the road is ascribed to lack of care 
of the road during and after the very heavy rains of the past summer. 
The roadway can be saved by the addition of suitable new material 
and by reshaping the surface. 
EXPERIMENT AT FORD, KANS. 
This road was inspected December 20, 1915. In the first 100 feet 
south of the bridge over the Arkansas River the road has become 
flat. One depression has formed at the end of the bridge and at two 
other places on the filled approach to the bridge the sand-clay surface 
i has been cut through. 
The remainder of the section has been shaped with a road grader, 
but too much sand was brought upon the surface from the ditches 
during this process. In consequence the surface has become weak- 
ened and two deep ruts have formed under traffic. 
The depressions should be filled and a thin dressing of new material 
applied to the entire surface to take up the excess of sand. 
SUPPLEMENTARY REPORT OF EXPERIMENTS MADE AT BOWLING GREEN, 
KY., 1907. 
KENTUCKY ROCK ASPHALT. 
The original report of this experiment was published in Circular 
No. 89, and reports of annual inspections are given in Circulars Nos. 
90, 92, 94, 98, and 99, and in U. S. Department of Agriculture Bulle- 
tins Nos. 105 and 257. The inspection on which this report is based 
was made December 13, 1915. 
This work has not been repaired or cared for in any respect since 
its construction. Debris carried or dropped upon it has been swept 
by rain and traffic into ridges on each side, which interrupt lateral 
drainage and hold dirt on the surface. Consequently the deteriora- 
tion has not resulted from traffic only. The failure is most marked 
in the western one-third, where the surface is full of holes varying 
from 4 square feet to 12 square feet in area. In the middle one-third 
of the pavement length there is one large broken area at the south edge 
which is 4 feet wide by 10 feet long. The eastern one-third of the 
section is still practically intact. Here the most noticeable defect is 
a shallow unbroken rut on the south side made by a heavy concen- 
trated load during construction and not entirely eliminated by subse- 
quent rolling. Where the surface is broken the asphalt has disap- 
peared and the rocks are loose. Where the binder has not failed the 
surface is smooth and hard and firm. 
