DUST PREVENTION AND ROAD PRESERVATION, 1916. 
77 
o 
I 
eo 
§ ® 
No repairs ; 
area of de- 
fects mate- 
rially in- 
creased. 
8s 
^ as 
a tin 
°£ 
No mainte- 
nance, and ac- 
cumulation of 
dirt on sur- 
face. No great 
change in con- 
dition. In 
places practi- 
cally all as- 
phalt has dis- 
appeared. 
§1 
'-3 >> 
For 50 feet 
from west end 
north half 
badly worn 
and rock as- 
phalt over half 
gone; south 
half in fair 
condition; 33 
depressions in 
remainder of 
section, show- 
ing that dis- 
integrati on 
has been quite 
rapid during 
the year. 
Condition 
January 10, 1913. 
Surface gener- 
ally intact, 
smooth, and 
hard; hole at 
east end not 
yet repaired ; 
three small 
worn places 
at 3, 25, and 
45 feet , respec- 
tively, from 
west end; dis- 
integrated as- 
phalt; also 
three shallow 
depressions in 
crown at mid- 
dle of section. 
O o 
Surface hard, 
firm, fair- 
ly smooth, 
well bound; 
small hole 
mentioned in 
last report 
now about 1 
foot in diam- 
eter. 
b2 
lis 

(Light rains al- 
te mating 
with freezing 
weather for 10 
days preced- 
ing.) Smooth 
and hard gen- 
erally; eastern 
half shallow 
ruts about 2 
feet from 
edges, indicat- 
ing insecure 
shoulders; one 
small hole 100 
feet from east- 
ern end. 
Condition 
May, 1909, 
after heavy 
rains. 
Surface clean, 
smooth, and. 
compact; no 
ruts; surface 
course of rock 
asphalt worn 
down in places 
to crushed 
stone, but 
stones were 
tightly bound. 
g§ 
Road smooth, 
free from ruts, 
limestone 
showing in 
only two 
small places 
which were 
perfectly bond- 
ed; at orieplace 
shoulders had 
settled slight- 
ly. 
Section had 
been covered 
with gravel, 
and no result 
was obtained 
from its use. 
Description of 
original 
construction, 
1907. 
Rock asphalt.— 
Scarified 
gravel base, 
4-inch lime- 
stone, loose, 
rolled once to 
smooth; 1£- 
i n c h fine 
crushed rock 
asphalt; fin- 
ished by thor- 
ough rolling. 
Oil penetration. 
—Gravel road; 
rather flat 
crown; appli- 
cation of 
heavy oil, 
mixture of 
residual oils; 
average 0.9 
gallon per 
square yard; 
applied with 
gravity 
sprinkler. 
1 
."3 
CO 
o 
Ex- 
peri- 
ment 
No. 
*""' 
CM 
