The Hudson River Tunnel.

Issue 4 and Volume 1891 10.

The Hudson River Tunnel. Work upon the main heading of the tunnel under the Hudson river at New York has now reached a point where a radical change from the original plans, and one of considerable interest to engineers, will be made. The heading has now, as will be seen by the sectional view, for which, and the other illustrations and the facts, we are indebted to The Scientific Ameri. can, nearly reached the rock upon the New York shore of the river. According to the original plans the tunnel was to have been driven through the crown of this rock. This would, however, have necessitated blasting, with all the risks attendant upon such work, and the present contractors propose to adopt a different plan. Starting back from the shore at about the 3800foot mark, measuring from the west or New Jersey end of the tunnel, they propose to increase…

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