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    Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The East River Division. Paper No. 1152
    Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The East River Division. Paper No. 1152
    Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The East River Division. Paper No. 1152
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    Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The East River Division. Paper No. 1152

    By Alfred Noble

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    LanguageEnglish
    PublisherArchive Classics
    Release dateNov 26, 2013
    Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The East River Division. Paper No. 1152

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      Book preview

      Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The East River Division. Paper No. 1152 - Alfred Noble

      The Project Gutenberg EBook of Transactions of the American Society of

      Civil Engineers, Vol. LXVIII, Sept. 1910, by Alfred Noble

      This eBook is for the use of anyone anywhere at no cost and with

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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 Division. Paper No. 1152

      Author: Alfred Noble

      Release Date: March 28, 2006 [EBook #18065]

      Language: English

      *** START OF THIS PROJECT GUTENBERG EBOOK TRANSACTIONS OF THE AMERICAN ***

      Produced by Juliet Sutherland, Sigal Alon and the Online

      Distributed Proofreading Team at http://www.pgdp.net

      AMERICAN SOCIETY OF CIVIL ENGINEERS

      INSTITUTED 1852

      TRANSACTIONS

      Paper No. 1152

      THE NEW YORK TUNNEL EXTENSION OF THE PENNSYLVANIA RAILROAD.

      THE EAST RIVER DIVISION.

      By Alfred Noble, Past-President, Am. Soc. C. E.

      A general outline of the work included in this Division has been given by General C. W. Raymond, M. Am. Soc. C. E., in the first paper of the series. The few pages following are intended only as a note to connect his paper with the more detailed descriptions of the execution of the work, which will be supplied by the Resident Engineers in immediate charge.

      Soon after the Company's project was made public, in the latter part of 1901, borings were begun in the East River, and a few weeks later in Manhattan and Long Island City. A preliminary base line was measured on the Manhattan side, and temporary transit stations were established on buildings from which all borings in the river were located. The river borings were all wash-borings made from a pile-driver boat. After the results were plotted on the map, contour lines were drawn to indicate the rock surface, and profiles along the tunnel lines were plotted from the contours; as the borings were preliminary to the final location of the tunnels, and in many cases at some distance from the tunnel lines, considerable divergence from the actual rock surface was expected, and realized in a few places, yet on the whole the agreement was very good. The borings revealed two depressions or channels where the rock surface passed below the grade of the projected tunnels, these depressions being separated by a rock reef which extends down stream from Blackwell's Island. In 32d and 33d Streets in Manhattan,

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