The Wenatchee daily world. [volume] (Wenatchee, Wash.) 1905-1971, 1909-11-10

WENATCHEE DAILY WURUD
so cents; wood block, 80 to 40 cents;
standard asphalt, 20 to "a cents; Wit
rified brick, % to 35 cents.
The Seattle report on sandstone
block states that the pavement is CIV
ing excellent satisfaction, being laid
on grades which are considered pro-
hibitive in many cities. the ascent be-
ing at the rate of 1 8 per cent in some
instances. Wood block paving is but
little used and what has been laid
was done so lately that no statement
was made concerning it. Standard
asphalt appears to be giving good
satisfaction in Seattle, the pavement
being hard and firm and showing but
little effect from ,calking in hot wea-
Their. In the residence district a
four-inch concrete base is used for
asphalt and in the business and semi
business districts a six-inch base. On
this a one-inch binder course is
placed, with a two-inch surface coat
ing.
Vitrified brick paving is the latest
type used at Seattle and City Engi-
neer Thompson is quoted as follows
concerning the material: ''Vitrified
brick is the best and most economical
paving material laid today. The first
cost is a trifle high, but the differ
ence is soon made up in mainten-
ance.'
The brick used in Seattle are the
product of a company located at Rem
ton and it is able to lay down the
bricks in the city at $40 per thou
sand. The bricks are thoroughly
tested by RATHER. absorption, frac-
ture and other tests. This class of
pavement is laid on streets having a
grade up to 6 per cent.
The pavements of Tacoma are re-
ported to be about similar to Seattle.
Vitrified brick and sandstone blocks
are used in the business districts, the
latter being the rule on steep grades
of which there are many in the city.
Standard asphalt is the popular pave
ment in the residential district.
Portland is reported to be up-to-
date in street paving, the city hav-
ing twenty miles under construction
this year The types of pavement
used and their mileage already laid
are as follows: Standard asphalt
1897; bithulithic (asphalt macad-
ann. 20.5S; bituminous macadam
.15 miles; Hassam pavement, SO
miles: vitrified brick, l mile: wood
block. 1875 miles; stone block. 1.55
miles.
Bithulithic pavement is the most
popular in Portland, where it gives
good satisfaction. This is laid direct
upon compact subgrade and varies
in depth from six to seven inches
The base course of three inches OF
basalt rock is covered by a heavy
coat of asphalt binder which is rolled
with 15-ton roller. The surface
course is composed of six sizes of fine
Nv Id n fuyH
inches to dust, which is mixed with
special bituminous compound al
great heat, the coat being rolled in
place with the heavy roller. A flush
coat is finally laid to seal all pores
in the surface and the pavement COW
cred with fine rock screenings. Mr.
Howe states he inspected many
streets paved with bithulithic pave.
ment which had been laid from one
to seven years and found all in ex-
cellent condition
The Hassam pavement in Portland
IS stated to present good appear
ance and it is thought the city's ex-
perience with this type of material
will be of value to other cities at a
future date
Wood block paving and vitrified
brick paving appear to be but indif-
ferently acceptable in Portland. The
report intimates. however, that this
improperly done, the materials and
workmanship not being up to prop
er standard Standard asphalt paw.
ing on the other hand gives good sat
isfaction in the residential and SUI
burban sections of the city