The Project Gutenberg EBook of Transactions of the American Society of
Civil Engineers, Vol. LXVIII, Sept. 1910, by James H. Brace and Francis Mason

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Title: Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910
The New York Tunnel Extension of the Pennsylvania Railroad.
The Cross-Town Tunnels. Paper No. 1158

Author: James H. Brace and Francis Mason

Release Date: August 13, 2006 [EBook #19037]

Language: English

Character set encoding: ASCII

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AMERICAN SOCIETY OF CIVIL ENGINEERS

INSTITUTED 1852

TRANSACTIONS

Paper No. 1158

THE NEW YORK TUNNEL EXTENSION OF THE
PENNSYLVANIA RAILROAD.
THE CROSS-TOWN TUNNELS.[A]

BY JAMES H. BRACE AND FRANCIS MASON, MEMBERS, AM. SOC. C. E.

In this paper, it is proposed to describe the construction of the
tunnels extending eastward from the easterly extension of the Terminal
Station to the permanent shafts east of First Avenue.

They were located under 32d and 33d Streets from the station to Second
Avenue, and thence, curving to the left, passed under private property
and First Avenue to the shafts, as described in a preceding paper.
Typical cross-sections of the tunnels are shown on Plate XII.[B]

On May 29th, 1905, a contract was entered into with the United
Engineering and Contracting Company for the performance of this work.
This contract provided that work on each pair of tunnels should be
carried on from two shafts. The first, here referred to as the First
Avenue Shafts, were located just east of that avenue and directly over
the line of the tunnels; the other two, called the Intermediate Shafts,
were located on private property to the north of each pair of tunnels in
the blocks between Fourth and Madison Avenues. It was originally
intended to do all the work of construction from these four shafts.
Workings were started both east and west from the Intermediate Shafts,
and those to the west were to be continued to the Terminal Station.
After the chang