Arizona republican., 1911-02-11


alleys in the center of the blocks thus
increasing the drainage slopes OF your
| streets 100 per cent or more.
The benefits derived are better
drainage, the water of each block en-
| tirely disposed of. comparatively dry
| street intersections. no excessive
amount of water to step over during
| rain.
For the business portion of your
| city ! suggest a standard asphalt
pavement made up of five-inch base
| of hydraulic concrete, one inch of
| binder course and two inches OF wear
! ing surface. These thicknesses are
| standard in several cities of southern
California. They have been tried out
and found to last. | recommend hy-
| draulic concrete on account OF the ma
| ture of your soil. An asphalt placed
! directly on the sub-base conforms TO.
and sinks with the settlement of the
ground. In trenches and crosscuts for
pipes and sewers there is no bridging
! action, consequently the surface of
your asphalt will show inequalities
and depressions. With hydraulic con-
crete base the inequality will be
! bridgod over and your asphalt remain
smooth and true to form. / have had
occasion to open a piece OF asphalt
pavement With hydraulic concrete
base on account Of a leaky water
main. within the last few days and
the pipe trench had sunk at least four
] inches if this was asphalt. both base
| and top. you may be sure you could
| have told where that trench was from
| the surface. Our soil is adobe and so
! is yours. Another reason for the hy-
draulic concrete base is the readiness
Of making repairs or of entirely
changing the top to other forms of
Pavement such as Bitulithic or vitri-
fled paving brick. | believe with your
| excellent sand and gravel that a by
dre ulic concrete base can be made as
cheap as an asphalt base.
A sheet asphalt pavement will be
tempered by the makers so as to
stand climatic conditions of heat or
cold. This applies also to Bitulithic
pavement
While on the subject of asphalt
pavements. il might be we'll to call
your attention to underground public
conduits. such as sewer. gas and wa
ter Confine these conduits to the
alleys II possible They are nearer
the portion of the building using them
and as alley has less extent TO trench
cross-wise The Inconvenience is To-
cal and not general.
few things to be done before
making any permanent Improvement
Is as follows: Construct all sewer
necessary. including the house connec-
tons TO the curb or property line.
also all water and gas mains and
their corresponding house laterals.
See that the water mains are galvan-
lied or dipped pipe. The alkali in the
soil win eat out. in time, the ordinary
black pipe. See that the gas mains
are tight. Gas is an enemy to as
phalt. Put the telephone and tele
graph companies in the alleys and
where they cross your asphalt streets
have underground conduits for them
Your materials for street work are
most excellent.
The natural gravels of your river
bed are within easy reach of all ce-
ment work and there is no monopoly
about IL.
The gravel and sand can be graded
to fit any class of cement work. Your
new concrete bridge now in course of
construction across the river is fine
example of their availability and
worth
Within eight miles of your civic
center and adjacent to your railroad
are fine deposits of fine brown sand
stone for road building. This stone is
sufficiently hard for your pur-
You have also a cemented material
pcit -
clay intcrmixed with hard angular
stones. ranging in size from one
quarter to one inch i'm diameter.
This natural deposit looks good To-
me for street purposes when mixed
with road asphaltum whether for re-
pairs or top dressing.
The roadway in general should be
so to 81 feet between curbs and for
cross streets may be even - to 20
feet. the extra width being used in
residence street having a car line
on il will need 3s 20 40 feet between
the curbs. This gives ample space on
each side for passing a car.
A business street needs so feet be-
tween curbs and il should be in sheet
asphalt for smoothness of travel.
noiselessness and frequent clean
ing
The tree space is variable guam
tity but il should be not less than ten
feet for pepper trees or trees having
fiat spreading roots.
We all know that railroads will
charge all the traffic will bear. That
is equally true. of individuals and for
what we would do ourselves. if we
had a chance. we can hardly reproach
the other fellow for doing. Con-
tractors are noticeably like railroads
and will monopolize the necessary
materials for road building among one
or two. If possible, to crowd the lit
tie fellow out. This is good business
and is to be commended for it is just
what We would do if We could. Now
you must meet that business move
and forestall 1t by owning your own
quarry and crusher plant. Then all
the traffic win bear" will be just
what YOU can furnish rock for and
the little fellow will know what he
can get rock for and where he can
get it when he wants it, IL he can
do better that is his privilege. and let
him go to il.
Another item of equal importance
is the control. supply and quality of
your road oil for -our streets. A
half dozen separate storage plants and