Tags: Tunnel.

The Howard Tunnel is located near New Salem Pennsylvania. In operation since 1838 it is the second oldest active rail tunnel in the U.S. Originally constructed by the York and Maryland Line Rail Road it formed a critical link in the north-south line assembled by the Northern Central Railway.It is a 275-foot (84 m) long brick-lined tunnel built between 1836 and 1837 and opened for traffic in 1838.

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