DESCRIPTION OF THE LINE.

The following summary description of the various divisions of the line

is intended to give a comprehensive idea of the general features of the

project. Full details will be given in succeeding papers. The line and

its respective divisions are shown on Plate I.

_Meadows Division._--Chief Engineer until March 1st, 1906, Mr. William

H. Brown, Chief Engineer, Pennsylvania Railroad Company, when he retired

from active service with the latter Company; since March 1st, 1906, Mr.

Alexander C. Shand, Chief Engineer, Pennsylvania Railroad Company.

This Division consists of an "interchange yard" at Harrison, near

Newark, N. J., adjoining the tracks of the present New York Division of

the Pennsylvania Railroad, and a double-track railroad across the

Hackensack Meadows to the west side of Bergen Hill, a distance of 6.04

miles. The construction is embankment and bridge work, including bridges

across the Pennsylvania, Erie, and Lackawanna Railroads, and the

Hackensack River.

_North River Division._--Chief Engineer, Mr. Charles M. Jacobs.

This Division commences at the west side of Bergen Hill and passes

through the hill in two single-track rock tunnels to a large permanent

shaft at Weehawken, near the west shore of the North River, and thence

eastward a distance of 224 ft. to the Weehawken shield-chamber. It then

passes under the river through two cast-iron, concrete-lined,

single-track tunnels, with outside diameters of 23 ft., to a point under

32d Street, near Eleventh Avenue, in New York City, and thence through

two single-track tunnels of varying cross-section, partly constructed in

cut-and-cover, to the east side of Tenth Avenue. It then passes into the

Station Yard and terminates at the east building line of Ninth Avenue.

The work included the Station Yard excavation and walls from Tenth

Avenue to Ninth Avenue, and the retaining walls and temporary

underpinning of Ninth Avenue. The aggregate length of the line in this

Division is 2.76 miles.

_New York Station and Approaches._--Mr. George Gibbs, Chief Engineer of

Electric Traction and Station Construction.

The Station and its approaches extend from the east line of Tenth Avenue

eastward to points in 32d Street and 33d Street, respectively, 292 ft.

and 502 ft. east of the west line of Seventh Avenue. This Division

included the construction of subways and bridges for the support of 31st

and 33d Streets and Seventh, Eighth, and Ninth Avenues, the Station

building between Seventh and Eighth Avenues, the foundations for the

post office to be erected west of Eighth Avenue, the service power-house

in 31st Street between Seventh and Eighth Avenues, the power-house in

Long Island City, the traction system, tracks, signals, and

miscellaneous facilities required in the physical construction of the

entire terminal railroad ready for operation. Messrs. McKim, Mead, and

White were the architects for the Station and Messrs. Westinghouse,

Church, Kerr and Company executed the structural engineering work, both

in the station and for the support of the streets, as well as the

construction of the subways.

The station is of steel skeleton construction with masonry curtain

walls, all supported by a system of columns extending to a rock

foundation. This building covers two city blocks and one intersecting

street, and has an area of about 8 acres. It is 774 ft. long, 433 ft.

wide, with an average height above the street of 69 ft., and a maximum

of 153 ft. The main waiting-room is 277 ft. long, 103 ft. wide and 150

ft. high. The Concourse is 340 ft. long and 210 ft. wide.

The level of the track system below the street surface varies from 39 to

58 ft., and is from 7 to 10 ft. below mean high water in the harbor,

thereby necessitating the establishment of an elaborate system of

drainage over the entire station yard area. Access to the street is

gained by elevators and stairways.

To accelerate the loading and unloading of the trains, high platforms

will be constructed in the station on a level with the floors of the

cars, in order to avoid the use of car steps and increase the traffic

capacity of the station.

There will be 21 standing-tracks at the station, and 11 passenger

platforms, providing 21,500 ft. of platform adjacent to passenger

trains. Within the station area, which from Tenth Avenue to the normal

tunnel sections east of Seventh Avenue comprises 28 acres, there will be

a total of about 16 miles of track.

The service plant for the installation of machinery for lighting,

heating, and ventilating the station, and for operating the interlocking

system, is located in an independent building south of the station.

The Power-House to supply the electrical energy for the operation of the

tunnel line and the Long Island Railroad is situated on property in

Queens Borough adjoining the present Long Island Railroad Station near

the East River, and was constructed under the Chief Engineer of Electric

Traction and Station Construction. As at present designed, the

dimensions of the structure are 200 ft. by 262 ft., outside measurement.

It can accommodate six generating units of 5,500 kw., the standard

adopted for future work, and two of 2,500 kw. for lighting the tunnels.

The ultimate capacity of this station when extended will be about

105,000 kw.

_East River Division._--Chief Engineer, Mr. Alfred Noble.

This Division begins at the eastern limits of the New York Station at a

point in 32d Street, 292 ft. east of the west line of Seventh Avenue,

and at a point in 33d Street, 502 ft. east of the west line of Seventh

Avenue, and also includes the excavation work and retaining walls for

the station site and yard, to the track level, westward to Ninth Avenue.

It extends eastward from the station under 32d and 33d Streets through

tunnels partly three-track and partly so-called twin tunnels to Second

Avenue; thence the line curves to the left under private property to

permanent shafts a few feet east of First Avenue. Four single-track,

cast-iron, concrete-lined tunnels, with outside diameters of 23 ft.,

pass under the East River, and, after passing through permanent shafts

near the bulkhead line, reach the surface in Long Island City from 3,000

to 4,200 ft. east of the East River. The tunnel portals are in

Sunnyside Yard, which extends to Woodside, the easterly end of the

Division, and the Yard grading with its buildings and a number of City

viaducts crossing it were executed under this Division. The total length

of the Division is 4.48 miles.

The total length of the entire line is 13.66 miles. There are 6.78 miles

of single-track tube tunnels, and the average length of the tunnels

between portals is 5.56 miles.

[Illustration: PLATE II.--Pennsylvania Tunnel and Terminal Railroad. Map

and Profile. Harrison Yard to Bergen Hill Tunnel. Meadow Division July

30 1909]

Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. Paper No. 1150 · 第 11 / 15 题