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 41 of 93 (44%)
page 41 of 93 (44%)
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All earth | 174 |1,333.3 | 7.66 | |
--------------+------+--------+--------+--------------------------------------+ LINE B, LONG ISLAND. --------------+-----------------+-------------------+-------------------------+ | | Station: | Date: | | |---------+---------+------------+------------+ | | | | | | Material. | Method. | From | To | From | To | --------------+-----------------+---------+---------+------------+------------+ All rock |Bottom heading | 69+29.6 | 70+46 |Oct. 16, '06|Nov. 20, '06| | | | | | | Earth and rock|Bottom heading | 70+46 | 71+95 |Nov. 20, '06|Feb. 23, '07| | | | | | | All rock |Bottom heading | 71+95 | 72+25 |Feb. 23, '07|Mar. 6, '07| | | | | | | Earth and rock|Center heading | 72+25 | 72+60 |Mar. 6, '07|Mar. 24, '07| | | | | | | All rock |Going out of rock| 72+60 | 76+57 |Mar. 24, '07|Aug. 7, '07| | | | | | | Earth and rock|Soft ground | 76+57 | 77+30 |Aug. 7, '07|Sept 5, '07| | | | | | | All earth |Soft ground | 77+30 | 90+49.6 |Sept 5, '07|Mar. 19, '08| --------------+-----------------+---------+---------+------------+------------+ --------------+------+--------+--------+--------------------------------------+ | | |Rate of | | |Number| |progress| | |
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