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Allegheny Portage Railroad National Historic Site
Rivers and Streams
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| |  | | Did You Know? In 1824 an all-water route through the Allegheny Mountains was proposed. A 4 mile tunnel "like a well dug horizontially" would be needed, along with ventilation shafts and support features. A portage over the mountains was built instead. more... | | |
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Last Updated: July 08, 2008 at 11:32 MST |