_Bergen Hill Tunnels._--These are two single-track tunnels, 37 ft. from
center to center, and extend for a distance of 5,940 ft. from the
Weehawken Shaft to the Hackensack Portal. They were built almost
entirely through trap rock. The contract was let on March 6th, 1905, to
the John Shields Construction Company, but was re-let on January 1st,
1906, to William Bradley, the Shields Company having gone into the hands
of a receiver. About 1,369 ft. of the tunnel excavation was done by the
Shields Company, but no concrete lining. The maximum monthly progress
for all headings was 622 ft., and the average progress was 338 ft. A
working shaft 216 ft. deep was sunk from the top of the hill, to
facilitate construction. The tunnels are lined with concrete throughout.
Typical cross-sections of these tunnels are shown on Plate VIII.

In conclusion it may be admissible for the writer after having, in
conjunction with Mr. Samuel Rea, experienced the evolution and
materialization of this Pennsylvania Railroad scheme, to express his
great sorrow for the untimely death of the father of the entire scheme,
the late President Cassatt.