Troy weekly news. (Troy, Idaho) 1897-1933, 1907-09-13

Undertakings or longitudinal tiling
of the road or roadway lowers the wa
ter level and maintains a dry subsoll,
thickening the crust of the surface so
as to permit heavier loads. and prevents
settling of the roadbed; also prevents
the destructive effect of the frost.
Three to four inch tile Is a suitable
size and can be laid so as TO be carried
down into the side bitches ait regulqr
intervals, thus having n free outlet. a
line of three or four inch draintile laid
along either or both sides of the grade
at sufficient depth to intercept the IN
derhow will effectually lower the wa
ter level and drain the subgrade. II
the road is located on a slope or side
hill, the line of tile should be laid on
the upper side of the roadway, under
and across the roadway into the lower
ditch.
The arrangement of side bitches or
drainage should be such as will 81
fectually carry away from the road
way or grade all water from either
ditch and prevent the storm water
from adjacent lands reaching the road
way or grade. Wide shallow bitches
with long fiaring sides toward the road
way or grade should obtain, the out
side bank having slope enough to pre-
vent caving, which will necessarily
have to be changed for the different
soils over which the road may pass
The slope from center or highest point
in the roadway should be made with
two planes, say one inch to the foot
for six feet each way from the center;
then change to one and one-half inch to
the foot and carry this gradient to the
outside of either ditch, a distance of
another six feet. This will leave
enough BERN to support the travelled
roadway.
Side bitches should have a uniform
grade and free outlet into some water
way. so as to drain the road quickly.
Under no conditions should water he
allowed to stand in the side bitches, as
1t filters through and into the subsoil
Of the grade. Water should not be car
] ried long distances in the side bitches
nor concentrated to avoid a culvert
Natural drainage conditions should be
followed as nearly as possible, and
whenever the flow of water in a draw
or waterway is INSTRUCTED by interpos
ing dam in the shape of a road grade
the natural conditions should be re
stored by supplying an outlet in the
shape of an adequate culvert across OF
through the road grade to the lower
ditch.
Drainage of the surface of road Is
largely determined by its maintenance
If the depressions and ruts are filled
by some device or machine so as Il
leave a smooth, even surface, which is
easily and quickly accomplished, the
roadbed will remain dry and solid. Or
long. steep grades 'thankyou-ma
or water breaks should be constructed
at frequent intervals to force the storm
water into the side bitches. Construc
these in a broad angle, extending from
an apex in the center of the road, dowI
and out to either ditch. The sleeper
the grade the sharper the angle should
be. They should also be made at thu
top or summit of every hill to intercept
storm water and divert 1t to the sid
bitches.
In conclusion, let me recommend thu
employment of a competent enginee
to plan all drainage and make prOfile
and contour maps. He will lOcat'
properly the line of drains and roads t,
be constructed. His contour maj
should show the acreage Of drainag
areas that shed water to each culvert
and his profles should show grades
cuts and fills and estimate quantity o
yardage Of each.