Telegram-herald. ([Grand Rapids, Mich.) 18??-1892, 1891-05-11

ssaa,ss~s. fssgss.. ass Prospects, ~
hssss- dads t.ssasa.
Work on the Niagara Pals tunnel 4.
10 be pashed as rapidly as possible. ac-
eesdlng ia reeen, reports. shat. No.
- sise feet below the upper hoe OF Use
tunnel. and headings viii be turned
soon. Al shaft No. the headings are
already advanced thirtfise feet N each
direction. Al iltr lasEtal the tunnel has
been arsen thirty feet. and the con.
tractors railway IA being lad.
uaasos his.s t.aaei.
The Hndson nsef tunnel IL ia nearly
3 400 leet of the 8. 400 feet necessary for
completion. and - progressing at the
rate OF ten feet day. Three shifts are
at work. Iwia hydraulic elevators have
been pat In 10 provide tor moro rapid
removal ot loaded cars. Negotiations
are now being made for an electrical
plant To he placed at the New jersey en-.
trance, with view To the substitution
OF electricity for mule-power IN hauling
the loaded cars from the shield 10 the
end OF the shaft. No work has been
done on the New York side of the tun-
mel since the new management, Sir
benjamin Baker aud Sir John Fowler,
took charge of the questions. A new
shield, however, 10 now ready for the
work at this end. 1t can be put into
place, and work may he resumed at any
time.
Irish Channel Tunnel
This project is still topic for discus
son among English engineers. An .x-
change says: "rhere seems to DO nu
fear IN this case that the tunnel might
be made the route for invasion by a
foreign army, although when the tun.
mel beneath the English channel was
under discussion the idea that in tin G
of war the tunnel might be con.
venient means for Invading England
proved an insurmountable barrier Ia
the enterprise. Besides the proposed
tunnel, tor which four routes have
been suggested, there have been pro,
posais 10 build a submerged tubular
bridge about 90 feet below the surface
OF the water, q causeway after the
fashion Of breakwater, and a series OF
great cantilever spans like an extended
Forth bridge. The tunnel, however,
seems the most feasible plan for max.
ing the crossing, and its cost is esti-
mated at from SIS, 200, 900 to $50, 000,.
Co.,"
Tunnel Under the Detroit.
The new Detroit river tunnel is q
probability of the near future. The
Michigan Il Canada Tunnel Company
has been organized. supposedly In the
interest of the Michigan Central Rail
road Company, to build double-track
railway tunnel under the Detroit river
connecting Detroit, Mich, and Windsor
Ont. The tunnel will cross the river q
short dista nee below the present Michi.
gan Central transfer ferry, and
will open on the main line on
the Detroit side of the river
about one mile back from the shore.
The total length will be IL ,033 feet, OF
which 200 feet will be an open cut OF
the Canada side and 1900 feet an open
but on the Detroit side. The inclosed
i. portion or tunnel proper will be Sl3;
feet long. The tunnel will be lined
with steel plates, inside Of which will bt
| five rings OF brick and concrete. The
outside diameter of the lining will be
| 81 feet inch and the inside diameter
q feet. Preliminary work will begin
at once. The material penetrated will
be clay similar 10 that penetrated by
the Port Huron tunnel. Until more
complete surveys are made it cannot
be determined what the method of ex
cavatlon will be, but probably shield.
will be used similar to those used in
excavating the Port Huron tunnel.