Audubon County journal. (Exira, Iowa) 1884-1993, 1920-02-26

of fine aggregate and cubic feet of
coarse aggregate, reinforced by steel
reinforcement weighing not less than
so lbs to 100 square feet.
Type ID" Two course reinforced
concrete. Base course shall be 4
inches in thickness, mixed in proper
tons of / sack of Portland cement
to 2% cubic feet of fine aggregate and
cubic feet of coarse aggregate
Wearing course shall be inches in
thickness, mixed in proper tions of
sack of Portland cement to / cubic
foot of fine aggregate and / u feet of
No. l aggregate for wearing couls
same to be reinforced by steel rein
forcemeni weighing not less than so
lbs. to 100 square feet placed between
the base and wearing course.
Asphaltic Concrete Pavement.
The concrete for base of pavement
shall be inches thick of the follow
ing composition. One part Portland
cement, two and one-half parts sand
and five parts OF broken stone or
gravel by measure, on the base pre-
pared as aforesaid shall be laid the
asphlatic concrete, the asphaltic &C.
ment to be used shall be the best
quality, composed of asphalt refined to
a melting point of from 140 to 22O
degrees Fahrenheit, and shall show
an analysis of at least 95H of bitumen
soluble in bisulphide of carbon
Vitrified Brick Pavement
The base course shall be the same
as that herein prescribed for Asphalt
tic concrete pavement upon which
shall be placed sand cushion IL
inches in thickness. Wearing course
shall consist of the best qaulity vitri-
fled brick or brick block, true in form
and specially made for street paving
purposes, nor less in size than 21hx4x
s inches.
BituIithic Pavement.
The base course shall be the same
as that provided for Asphaltic con
crete pavement Upon such founda-
ton shall be laid the Bitulithic wear
ing surface and seal coat so as to have
thickness of 112 inches after thor
ough compression, the wearing sur
face shall be composed of hard crush
ed stone. sand and bitulithic cement,
in the proportions and in the manner
as provided by specifications on file
Bitustone Pavement.
Bottom course of pavement shall be
laid inches thick and shall be COM
posed of Portland cement concrete
mixed in the proportions of i part ce-
ment to 215 parts sand or crushed
screenings and 5 parts crushed stone
or gravel. Bonding course to be H.
inches thick composed of hard granite
ebert or trap rock mixed with Port
land cement in the proportion of 6
parts stone to part cement. Sur
face shall be thin layer of crusher
screenings placed on filler while hot
The curb shall be built of the form
and dimensions shown on detailed
plans on file in the office of the town
clerk. and shall be of concrete mixed
in the following proportion, one part
cement, two parts sand and three
parts coarse aggregate.
The foundation to be prepared and
the paving, curbing and grading to be
constructed and done in accordance
with the plans and specifications
therefor of the engineer now on file
in the offices of the town clerk of
Extra, Iowa.
Wherever the term Engineer" is
used herein, the same shall mean the
engineer employed by the town coun-
Gil to do the engineering work in con
nection with the construction of the
improvement herein declared neces-
sary and advisable.
The plans and specifications for
the construction of the foregoing i'm
provements by the engineer, and now
on file with the town clerk of Extra,
Iowa, and approved by the town coun-
Gil of the town of Extra, Iowa, on the
18th day of February, 1920, are here
by by reference, and without incor-
poration herein, made a part hereof
ALI grading shall be done and COM
pleted in each block before the paving
is commenced. All excavated mater
ial shall be the property of the town
and shall be delivered at any place
within 1000 feet, that the engineer
may direct and without expense to
the town. The sub-grade will be a
continuous line, the thickness of the
paving below the grade line of the
street and parallel thereto, and said
street shall be so graded as to con-
form to the shape of the finished paw
ing, and is to be according to the pro-
files and plans prepared by the engi-
neer and the stakes set by him, and
shall come to the grade established
or to be established, said excavations
below the grade and above the sub
grade to be considered a part of the
pavement and SO assessed All the
balance of the grading to be paid for
by the town.
The expense of making said i'm
provements, including the cost of in
tersections of streets and alleys, and
spaces opposite streets and alleys in
tersetcing but not crossing, to be as
sessed against all lots, parts of lots
pieces and parcels of land according
to area abutting thereon and adjacent
thereto. and including one-half of the
privately owned property between the
street so proposed to be improved and
the next street, whether abutting on
such street Or not; but not to include