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 James H. Brace; Francis Mason; S. H. Woodard

Material.	Method.	Station:		Date:		Number of days.	Linear Feet.	Rate of progress in feet per day.	Remarks.
		From	To	From	To
All rock	Bottom heading	69+39.9	69+79	Aug. 2, '06	Sept 25, '06	54	39.1	0.724
All rock	Center heading	69+79	70+64	Sept 25, '06	Nov. 21, '06	57	85	1.49
Earth and rock	Center heading	70+64	71+34	Nov. 21, '06	Dec. 30, '06	39	70	1.79
Earth and rock	Bottom heading	71+34	71+89	Dec. 30, '06	Feb. 13, '07	45	55	1.22
All rock	Bottom heading	71+89	72+11	Feb. 13, '07	Feb. 21, '07	8	22	2.75
Earth and rock	Center heading	72+11	72+67	Feb. 21, '07	Mar. 19, '07	26	56	2.15
All rock	Center heading	72+67	76+54	Mar. 19, '07	Sept 6, '07	171	387	2.26
Earth and rock	Going out of rock	76+54	77+24	Sept 6, '07	Oct. 4, '07	28	70	2.50
All earth	Soft ground	77+24	90+57.3	Oct. 4, '07	Mar. 26, '08	174	1,333.3	7.66

Line B, Long Island.

Material.	Method.	Station:		Date:		Number of days.	Linear Feet.	Rate of progress in feet per day.	Remarks.
		From	To	From	To
All rock	Bottom heading	69+29.6	70+46	Oct. 16, '06	Nov. 20, '06	35	116.4	3.33
Earth and rock	Bottom heading	70+46	71+95	Nov. 20, '06	Feb. 23, '07	95	149	1.57
All rock	Bottom heading	71+95	72+25	Feb. 23, '07	Mar. 6, '07	11	30	2.73
Earth and rock	Center heading	72+25	72+60	Mar. 6, '07	Mar. 24, '07	18	35	1.94
All rock	Going out of rock	72+60	76+57	Mar. 24, '07	Aug. 7, '07	136	397	2.92
Earth and rock	Soft ground	76+57	77+30	Aug. 7, '07	Sept 5, '07	29	73	2.52
All earth	Soft ground	77+30	90+49.6	Sept 5, '07	Mar. 19, '08	196	1,319.6	6.73

Line C, Long Island.

Material.	Method.	Station:		Date:		Number of days.	Linear Feet.	Rate of progress in feet per day.	Remarks.
		From	To	From	To
All rock	Bottom heading	68+61.9	69+93	June 11, '06	Oct. 16, '06	127	131.1	1.03
Earth and rock	Bottom heading	69+93	71+65	Oct. 16, '06	Feb. 7, '07	114	172	1.51
All rock	Bottom heading	71+65	71+91	Feb. 7, '07	Feb. 13, '07	6	26	4.33
All rock	Center heading	71+91	75+81	Feb. 13, '07	July 20, '07	157	390	2.48
Earth and rock	Going out of rock	75+81	76+56	July 20, '07	Aug. 25, '07	36	75	2.08
All earth	Soft ground	76+56	90+44.4	Aug. 25, '07	Mar. 17, '08	205	1,388.4	6.77

Line D, Long Island.

Material.	Method.	Station:		Date:		Number of days.	Linear Feet.	Rate of progress in feet per day.	Remarks.
		From	To	From	To
Rock	Bottom heading	68+50.6	69+77	June 2, '06	Oct. 24, '06	144	126.4	0.87
Earth and rock	Bottom heading	69+77	71+22	Oct. 24, '06	Jan. 13, '06	81	145	1.79
All rock	Bottom heading	71+23	72+00	Jan. 13, '07	Mar. 3, '07	49	78	1.59
All rock	Center heading	72+00	75+73	Mar. 3, '07	July 10, '07	129	373	2.89
Earth and rock	Going out of rock	75+73	77+63	July 10, '07	Sept 25, '07	77	190	2.47
All earth	Soft ground	77+63	90+38.6	Sept 25, '07	Mar. 7. '08	164	1,275.6	7.78

Line A, Manhattan.