62 BULLETIN 463, U. S. DEPARTMENT OF AGRICULTURE. 
quired the rate was, of course, correspondingly diminished. In this 
county teams with drivers cost from $3.50 to $5 per working day of 
from 8 to 10 hours, and the cost per mile for dragging a road in one 
trip showed a corresponding variation. The number of draggings 
necessar}^ per year varied over a wide range and depended on the 
length of time the road had been constructed and the character of the 
material composing the surface. 
The average cost per mile of dragging an earth road 8 miles long 
in Alexandria County, Va., during 1911 and 1912 was $1.25 for 
each dragging, which included an average of three round trips, and 
the total number of draggings necessary to maintain the road in 
good condition was 24 per year, making the average cost for drag- 
ging $30 per mile per year. This road was maintained as an experi- 
ment fry the Office of Public Roads and Rural Engineering. 
