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

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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 East River Tunnels. Paper No. 1159

Author: James H. Brace, Francis Mason and S. H. Woodard

Release Date: July 1, 2006 [EBook #18722]

Language: English

Character set encoding: ASCII

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AMERICAN SOCIETY OF CIVIL ENGINEERS

INSTITUTED 1852

TRANSACTIONS

Paper No. 1159

THE NEW YORK TUNNEL EXTENSION OF THE PENNSYLVANIA RAILROAD.

THE EAST RIVER TUNNELS.[A]

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

This paper will be limited to a consideration of the construction of the
tunnels, the broader questions of design, etc., having already been
considered in papers by Brig.-Gen. Charles W. Raymond, M. Am. Soc. C.
E., and Alfred Noble, Past-President, Am. Soc. C. E.

The location of the section of the work to be considered here is shown
on Plate XIII of Mr. Noble's paper. There are two permanent shafts on
each side of the East River and four single cast-iron tube tunnels, each
about 6,000 ft. long, and consisting of 3,900 ft. between shafts under
the river, and 2,000 ft. in Long Island City, mostly under the depot and
passenger yard of the Long Island Railroad. This tube-tunnel work was
naturally a single job. The contract for its construction was let to S.
Pearson and Son, Incorporated, ground being broken on May 17th, 1904.
Five years later, to a day, the work was finished and received its final
inspection for acceptance by the Railroad Company.

The contract was of the profit-sharing type, and required an audit, by
the Railroad Company, of the contractor's books, and a careful system of
cost-keeping by the Company's engineers, so that it is possible to
include in the following some of t