AMERICAN SOCIETY OF CIVIL ENGINEERS

INSTITUTED 1852

TRANSACTIONS

Paper No. 1157

THE NEW YORK TUNNEL EXTENSION OF THE
PENNSYLVANIA RAILROAD.
THE SITE OF THE TERMINALSTATION.1

By George C. Clarke, M. Am. Soc. C. E.

The purpose of this paper is to describe the preliminary work for andthe preparation of that portion of the site for the Terminal Station inManhattan, of the New York Tunnel Extension of the PennsylvaniaRailroad, which was constructed under the direction of the ChiefEngineer of the East River Division, including the disposal of materialexcavated from all parts of the Terminal construction and the tunnels onthe East River Division.

As outlined in the paper by Brigadier-General Charles W. Raymond,M. Am. Soc. C. E., Chairman of the Board of Engineers,the track yard ofthe station, Plate LIII, extends fromthe east line of Tenth Avenue eastward to points in 32d and 33d Streets,respectively, 292 and 502 ft. east of the west line of Seventh Avenue.The width of the available area at track level at Tenth Avenue is 213ft., continuing at this width to within 182 ft. of the west line ofNinth Avenue, where, by an offset toward the south, it is increased to355 ft. This width is held to a point 5 ft. east of the east line ofNinth Avenue, where, by an offset toward the north, it is increased to509 ft., which width continues to the west line of Seventh Avenue, whereit divides into two fan-shaped areas. The north area has a width ofabout 170341 ft. and the south one, 160 ft., at the house line, each area taperinggradually to the width of the standard three-track tunnel at the eastends, noted above in 33d and 32d Streets. Additional track room for fourtail-tracks is gained by the construction of two double-track tunnelsunder Ninth Avenue at 33d Street, their center lines being parallel tothe street and 45.5 and 84.5 ft. distant, respectively, from the northhouse line. An additional width of 24.5 ft. is occupied on the northfrom 277.5 ft. to 543.5 ft. west of the west line of Seventh Avenue,where the buildings on the north side of 33d Street have been torn downand the enclosing wall set back in anticipation of a future outlet to34th Street; and on the south, from 459 ft. to 597 ft. west of the westline of Seventh Avenue a rectangular offset of 124 ft. encloses the areaoccupied by the Service Building. The total area above outlined is thespace occupied at track level, and amounts to 28 acres, of which theportion west of the east house line of Ninth Avenue and south of a line107.3 ft. south of the south line of 33d Street is a part of the NorthRiver Division, and was constructed under the direction of the engineersof that Division; the fan-shaped areas east of the west house line ofSeventh Avenue were constructed under the direction of the ChiefEngineer of Electric Traction and Terminal Station Construction.

[opp. 340]PlateLIII.
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