Just as on the northwest side of Denver, there is a lot of construction going on along the east side as well. Commuter rails are being constructed between Denver Union Station and Denver International Airport. Much of the commuter rail trackage parallels UPs Limon Sub. UP is also adding a second main track for several miles as well as CTC to part of the Limon Sub. Here, a UP coal load heads east on what will become Main 1 once the second main is brought in to service.
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