The record-union., 1895-08-13
HOW TO CONSTRUCT GOOD STREETS.
Specifications Prepared by the Bureau
of Highways,
They Were Read Before the City
Trustees at Their Meeting Held
Last Night.

The following specifications. prepared
by r. G. Irvine of the State Bureau of
Highways. at the request OF the City
Trustees. were read before the latter body
at its meeting last evening. They were
specially prepared for paving. curbing
and guttering streets in Sacramento. The
report reads:
The work to be done under these speci-
hcations consists in: Q) Preparing the
sub-grade; (2) furnishing, laying and roll
ing the macadam; ~ furnishing the ma
terial and labor for constructing the
cutters.
The paving, curbing and guttering
herein provided for is to be constructed
according to the plan and cross-section
approved by the honorable the Board of
City Trustees Of the city OF Sacramento,
State of California, and on the lines as they
shall be located by the engineer Of said
city; and all work shall, during its pro-
gress and on its completion, conform to
the lines and levels which may be given
from time TO time by said engineer. The
preparation of the sub-grade shall con-
sist
First-Of grading, aud shall include
the removal OF all earth, stone, loose
rock, clay, shale, cement. hardpan, solld
rock, trees. stumps and all other materials
be removed in preparing tor curbs, gut
ters and pavements, and shall Include
also all filling. trimming, shaping. pick
Ing down, rehlllng, surfaclng, rolling
and other work, and all materials that
shall be necessary and requisite IN bring
ing the surface to the sub-grade and shape
required, and of maintaining the same in
perfect condition until the curbs have
been set and the cutters and pavement
laid
Second-When mud or other soft ma
terial is encountered, it shall be taken up
below the grade or sub-grade, and the
space shall be retilled with crushed rock
al the expense of the contractor.
Third-In places where filling is neces-
sary to bring the surface to the required
grade it shall be done in layers of not
more than one foot in depth, and each
layer shall be thoroughly rolled with a
roller weighing not less than soc pounds
to the inch, run before another layer is
added.
Foursh-The bed shall be brought to a
sub-grade or surface, the required thick
ness of the proposed macadam pavement
below the established grade, and shall be
finished in the most perfect manner, SO
as to be parallel with and in every way
made to conform to the surface of the
finished pavement as shown on the cross
section sheet on file in the office OF the
Trustees of the city of Sacramento. To
effect this, the surface shall first be
brought to an approximate finish about
two inches above the sub-grade, after
which it shall be sprinkled with water,
the amount to be applied being not in
excess OF fifty gallons TO 1000 square
yards. The sprinkling shall be imme
diately followed by rolling with roller
weighing not less thar 800 pounds to the
inch run, and the rolling shall be con-
tinued for period OF not less than eight
hours to each 1000 square yards of sur
face. The City Engineer shall then set
grade stakes every fifty feet along the
center of the roadway, and on the curb
line, after which the contractor shall
dress down or I'LL up to the true surface
all Irregularities, as indicated by said
grade stakes. The surface shall then be
again rolled and gprinkled until it shall be
true, smooth, compact and TO the proper
grade.
Fifth-Such portions of the street as
cannot be reached by the roller, and all
places excavated to a sub-grade and re-
tilled, and all pipe trenches and other
places that cannot be properly COM
pacted by the roller shall be solidly
tamped, and in case of wet weather or
soft or muddy ground, making the use
OF roller unsafe or impracticable, the
rolling shall not be undertaken before
such time as the City Engineer may
deem advisable.