Book-bot.com - 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 Woodard, S. H.;Mason, Francis;Brace, James H.

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
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{| | | | |
{| | | | |
| | | | |
Rock | 34 | 13 | 0.40 |Bottom heading timbered. |
| | | | |
Mixed | 45 | 38 | 0.84 | |
| | | | |
| | | | |
Mixed | 32 | 59 | 1.84 | |
| | | | |
| | | | |
Earth | 31 | 109 | 3.41 | |
| | | | |
| | | | |
| | | |Three days' delay to set shutters in |
Earth | 29 | 71 | 2.45 |top. Shut down 20 days to permit |
| | | |consolidation of the river bed and to |
| | | |repair broken plates. |
| | | | |
Earth |136 | 449 | 3.40 |Four days of 136, delay account of |
| | | |flood. |
| | | | |
Mixed | 20 | 24 | 1.20 | |
| | | | |
Mixed | 53 | 67 | 1.27 |Thirteen days' shut-down to put on |
| | | |hood. |
| | | | |
Rock | 53 | 78 | 1.47 | |
| | | | |
Mixed | 25 | 45 | 1.40 | |