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 by S. H. Woodard;Francis Mason;James H. Brace
page 42 of 93 (45%)
page 42 of 93 (45%)
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| of | Linear |in feet | |
Material. | days.| feet. |per day.| Remarks | --------------+------+--------+--------+--------------------------------------+ All rock | 35 | 116.4 | 3.33 | | | | | | | Earth and rock| 95 | 149 | 1.57 | | | | | | | All rock | 11 | 30 | 2.73 | | | | | | | Earth and rock| 18 | 35 | 1.94 | | | | | | | All rock | 136 | 397 | 2.92 | | | | | | | Earth and rock| 29 | 73 | 2.52 | | | | | | | All earth | 196 |1,319.6 | 6.73 | | --------------+------+--------+--------+--------------------------------------+ LINE C, LONG ISLAND. --------------+-----------------+-------------------+-------------------------+ | | Station: | Date: | | |---------+---------+------------+------------+ | | | | | | Material. | Method. | From | To | From | To | --------------+-----------------+---------+---------+------------+------------+ All rock |Bottom heading | 68+61.9 | 69+93 |June 11, '06|Oct. 16, '06| | | | | | | Earth and rock|Bottom heading | 69+93 | 71+65 |Oct. 16, '06|Feb. 7, '07| |
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