| Location. | Depth, in feet. | Width, in feet. | Length, in feet. | Excavation (including drifts) | Concrete, in cubic yards. | Date commenced. | Date finished. | Ground met: | Lined with: | Cost to Railroad Company. | Cost per cubic foot. |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manhattan: 11th Avenue and 32d Street. | 55 | 22 | 32 | 2,010 | 209 | June 10th, 1903. | December 11th, 1903. | Top 13 ft. filled; red mica schist and granite. | Concrete reinforced with steel beams down to rock. | $12,943.75 | $0.335 |
| Weehawken: Baldwin Avenue. | 76 | At bottom 56, at top 100 | At bottom 115.75, at top 154 | 55,315 | 9,810 | June 11th, 1903. | September 1st, 1904 | Top 6 ft. filled, 30ft. sand hardpan, decomposed rock (trap and sandstone)below. | Concrete with steel tie-rods in rock. | 166,162,98 | 0.337 |
After the tunnel work was finished, both shafts were provided with stairs leading to the surface, a protective head-house was placed over the New York Shaft, and a reinforced concrete fence, 8 ft. high, was built around the Weehawken Shaft on the Company's property line, that is, following the outline of the shaft as originally designed.
Plant.
Working Sites.
Before beginning a description of the tunnel work, it may be well to set out in some detail the arrangements made on the surface for conducting the work underground.
All the work was carried on from two shafts, one at Eleventh Avenue and 32d Street, New York City—called the Manhattan Shaft—and one at Baldwin Avenue, Weehawken, N. J.—called the Weehawken Shaft.