Clinch Valley news. [volume] (Jeffersonville, Va.) 18??-2019, 1900-03-30

cutting deeper than would be required
otherwise. 1t will be cut and cover
work from the lower terminus of the
line at the post Office loop to Thirty
second street. There the line dips un-
der Murray Hill through solid rock.
involving tunneling for eight blocks
TO Fortieth street. From Fortieth
street to Broadway and 10Sth street II
VIII be cut and cover, and from the
last named point to 121st street, I'M
der Broadway, the tunnelers will make
the route. There are few other short
stretches in the West Side line where
some tunnel work will be required.
notably at Fort George.
East Side Line,
The East Side line turns from the
main line at 103d street. its tracks
running down a gradual depression to
104th street, where they turn east un-
der the tracks of the West Side line.
Thence their course will be under Gem
trail Park, all tunnel work, to Lenox
avenue and 10th street From there
to the Harlem river at 143d street the
contractors will work in the open. The
tunnel under the Harlem will be cut
In accordance with the provisions OF
the law covering that point, which re-
quire that the roof of the tunnel shall
be twenty-one feet below low-water
mark. The cut and cover process con-
tinues on the other side OF the river to
149th street, past Third avenue and in
to Westchester avenue where the line
emerges and runs over elevated struc-
lures to Bronx Park Viaducts, or ele-
waited structures. will also be used at
pninfc Of tho
The most prominent of these will span
the steep grades of Broadway, con-
yerging at 125th street
The general tafa for the subway is
to prepare it with a concrete floor,
with steel columns at the sides and
centre every five feet, the roof CIR
ders resting on them and the spaces
between and behind them in the walls
filled with concrete and brick. The roof
is to be built of concrete, with arches
between and in varying thickness, ac-
cording to the conditions, above the
beams. In all cases the roof and sides
will be water-proofed, and wherever
water is found in the ground the con-
crete floor will have q waterproof lay
er to insure perfectly dry structure,
Many difficulties will have to be over
come TO attain that result, but all have
been taken into consideration and
have been provided for by Chief En-
gineer Parsons
SubIetting the Work.
! 1t will be impossible for Mr. Nc
Donald TO sublet the work on a basis
of bare money values, contracted for
! in advance. In a tremendous under
, taking of this kind changes of plans
; are certain as unexpected obstacles
arise. On a cold basis of dollars and
! cents such obstacles would lead to
frequent friction and delay. There
fore, the great contractor will deal
only with engineers who have not
.only the experience needed, but the
capital to carry out their contracts as
well, come what will.
In some places the constructors Of
the underground line will have to
Ework in water At Canal street, for
Einstance, the depth of the water in
kthe proposed ditch would be ten feet
EOther obstacles will be encountered
Ewhen the great hole is dug for the
Edouble-decked terminal loop in front
2of the post Office The lower floor will
be forty feet below the street surface.
land 1t is probable that extensive piline
will be needed to provide the proper
Support there.
TUNE nG is Easy.
In discussing The big undertalkino