![The Hoosac Tunnel](https://www.infrastructureusa.org/wp-content/uploads/2012/06/Screen-shot-2012-06-11-at-3.57.22-PM.png)
This is the twentieth in a series of entries celebrating infrastructure achievements in the United States. What: The Hoosac Tunnel was the longest tunnel in North America when it was built and remains the longest active transportation tunnel east of the Rocky Mountains. When: On February 9, 1875 the first train passed through the tunnel. […]
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