32 BULLETIN 105, TJ. S. DEPARTMENT OF AGRICULTURE. 



up rather unevenly, and this condition led to the formation of a 

 number of worn depressions toward the north end of the section, 

 where patching became advisable. The shallower places were cared 

 for by a thin paint coat of oil asphalt with screenings, but a few of 

 the deeper ones were cut out clean and filled with new stone, and a 

 patch was made by the penetration method. 



The total cost of patching during the past year was $4.05. 



Section No. 5. — Oil asphalt — Penetration method. 



During the past summer it became necessary to repair four small 

 worn depressions in which the stones were working loose. Three 

 were on the east side and one was on the west side of the road, and 

 all were close to the gutter. At the time of the inspection the sur- 

 face presented a somewhat uneven and worn appearance; coarse 

 surface stones were in evidence throughout, and the binder apparently 

 did not retain much life. There were, however, no signs of raveling 

 and no necessity for any repairs. 



The total cost of patching during the past year was $2.31. 



Section No. 6. — Oil asphalt — Penetration method. 



This section presents about the same general appearance as No. 5. 

 The depressions mentioned in the previous inspection report raveled 

 badly in a few months and were finally repaired with new stone and 

 oil asphalt applied by the penetration method. Four patches were 

 made along the west side close to the gutter and one at the north end 

 of the east side. 



The total cost of these repairs was $3.47. 



Section No. 7, A and B. — Oil asphalt — Penetration method. 



The bitumen used in this section was without doubt too hard and 

 had too high a melting point for this class of construction. In A, 

 where two coats were applied, the binder lacks life, and it became 

 necessary to patch another loose depression during the past season. 

 B offers an excellent demonstration of what prompt and efficient 

 maintenance can accomplish when the failure of bituminous con- 

 struction is imminent. The simple cold-surface treatment described 

 in Circular No. 99 undoubtedly prevented the loss of this section, and 

 it now presents a good surface. It has had no further attention and, 

 with the exception of one or two very small worn places which were 

 evidently not properly cared for when repairs were made, it will 

 probably not require any expenditure upon it during the coming 

 season. 



