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Rock and Rail (reporting mark RRRR) is a short line railroad operating in southern Colorado that is currently a subsidiary of Martin Marietta Materials.[1] The company began operations in July 1988.[2]
References
- ^ "Rock and Rail, LLC". Rock and Rail, LLC. Retrieved June 22, 2017.
- ^ "Rock & Rail LLC RRRR #661". www.up.com. Retrieved 2021-10-10.
External links
 | This United States rail–related article is a stub. You can help Wikipedia by expanding it. |
 | This article about transportation in Colorado is a stub. You can help Wikipedia by expanding it. |
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