(WHTM) – Central Pennsylvania has plenty of historical sites, from the nation’s first capital in York to the state capital in Harrisburg, but Pennsylvania is also home to the United States’ oldest existing transportation tunnel as well. In 1827, in Lebanon, the Union Canal Tunnel was completed and was part of the Union Canal that […]
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The Portage Lake Bridge is being recognized as one of the most significant historic civil engineering works in the country thanks to three Michigan Tech researchers.