St. Johns review. (Saint Johns, Or.) 1904-current, 1911-04-14
ORDINANCE NO. 81
An Ordinance Adopting Spec
ifications for Hard Surface
Pavement, Known as Wes-
trumite.

The city of St. Johns does ordain as
follows:
Section I. Hard surface pavement,
known as Westrumite shall be laid in
the following manner, unless otherwise
expressly provided:
GRADING.
Section a. The street shall be graded
down or filled up to the subgrade as
gwen by the city engineer, and all soft
and spongy places not affording a firm
foundation shall be dug out and the
space reflled with proper material care
fully rammed or rolled so as TO make
such filling compact and solid.
Only gravel or rock or suitable mate
rial free from all perishable and objec-
tionable substances shall be used in
bringing the roadway to the proper sub
grade, which shall then be rolled with a
road roller weighing not less than ten
tons until thoroughly compacted aud
solid and approximately parallel to the
proposed surface Of the contemplated
AL. embankments shall, whenever so
requireSby the city engineer, be built
in borizoiitsl layers or courses of not
more than onefoot in thickness for the
full width Of the einb9nkment and thor
oughly rolled. ~
Such rolling shall be 'uqmpleted in
sections OF az least one block ~spd shall
be tested and accepted by the city-Npgi-
neer before any materials for the paws
ment is placed thereon.
FOUNDATIONS.
Broken Rock Foundation.
Section /. Upon the subgrade, as
prepared. shall be spread layer inches
thick of broken rock that will pass
through ring Of ) inches internal di-
amcter, and be retained by Ia inch
screen, tree from all dirt and of quality
approved by the city engineer.
This layer shall be thoroughly rolled
aud compacted with steam roller,
weighing not less than ten tons.
Upon said layer Of crushed rock shall be
spread a sufficient quantity OF screenings
20 fll intcrs,ices between the large
stones, aud support them firmly in place.
This layer shall be- rolled aud compact
ed to a depth Of 4 "a iuches, leaving an
even, but coarse grained surface.
Concrete Foundation.
Section Upon the subgrilc ~
prepared, shall be- laid bed of concrete
not less than inches thick. This must
bc tnmpcd to the satisfaction OF the city
engineer. The concrete course shall
consist of one part of cement 10 three
parts oi sand and six Of gravel. The
quality of each must be approved 10y the
city engineer.
This concrete foundation laid 10 the |
proper grade aud thickness shall have
slightly rough surface.
WEARING SURFACE.
Wearing Surface Two Inches.
Section &. Upon the broken stone or
concrete foundation shall be spread
wearing surface which shall be composed
OF layer two inches thick of carefully
selected. sound, hard crushed rock that
will pass ia inch screen, aud be retain
cd by In. screen mixed with a sufficient
quantity of Westumite Asphalt To well
coat all surfaces.
Upon the above layer, raked level, but
In nowisc compactcd, shall he spread
layer 1 inch thick of bituminous NOR
tar, consisting OF clean limestone screen
ings, all of which shall pass the ia inch
screen, aud not less than 8 per cent nor
more than - per cent oi which shall
pass the i.2oo screen. Said screenings
TO bc thoroughly mixed with not less
than 10 per cent nor more than 20 per
cent by weight of Westrumite Asphalt.
This second layer shall be leyeled aud
smoOthed.
As soon as Westmmite has begun TO
yet the above two layers shall be rolled
with AN asphalt roller weighing not less
than five nor more than eight tons, until
they are thoroughly compaeted aud
left smooth.
After which a flush coat, consisting of
a thin layer OF fine limestone screenings,
mixed with sufficient quantity of Wes-
lrumite, diluted with is own bulk of
water To produce semi-Auid mixture,
shall be applied. This shall be covered
with thin layer of coarse sand aud the
surface again be thoroughly rolled,
This wearing surface shall have full
thickness of two inches, which, when
inished, must be perfectly true to the
required lines, levels aud grades aud
ross sections,
Composition of Westrumite Asphalt.
Section o. The Asphaltum ia West,
.Hmite Asphalt shall consist of half
Trinidad Lake Asphalt aud halt the best
'aliiomia Asphalt and the proper
Imount of Aux. All these materials
must conform with the requirements OF
he specifications for asphalt payements
Il the city engineer, aud the percentage
4 bitumen soluble in carbon bisulphide
hall not vary beyond the limits OF from
even To nine per cent OF the total mix
ure of the mineral aggregate and West
unite Asphalt.
Section 7. All ordinances in conflict
ierewith are hereby repealed.
Passed by the Council this nth day of /
Ipul, 1911,
Approved by the Mayor, this nth day a
I April, 1871, I
K.C. COUCH,
Mayor. il
Attest. Frank A. Rice,
Recorder.
Published in the ST. Johns Review ON