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Wednesday, June 11, 2025
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Kevin Morgan
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CP DS007 (Arvada)
Denver, CO
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48 (Add a Comment)
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Moffat Tunnel (UP)
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Union Pacific
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At CP DS007 (Arvada), the MGJNY diverges from the Main Track to Main 2. UP intentionally added a little dog leg curve to the main so Main 1 (far track to the right) would not be diverging at the switch. This is because heavy coal trains (and now oil train) generally run on Main 1, and UP did not want the heavy trains to diverging through the switch. The switch itself is actually a (relatively) high speed switch. It is long and has moveable point frogs.
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Monday, March 10, 2025
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Kevin Morgan
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CP DS007 (Arvada)
Arvada, CO
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143 (Add a Comment)
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Moffat Tunnel (UP)
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BNSF
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BNSF 5826 knocks down the signal at CP DS007 at Arvada as it continues east, moving from the main track to Main 1. The switch here at Arvada is a high speed switch. It actually has to switch motors as it has a moveable point frog. Rather than a solid chunk of steel, the frog point moves similar to a switch point. The oil train here is taking the non-diverging route.
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Sunday, November 3, 2024
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Kevin Morgan
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CP DS007 (Arvada)
Arvada, CO
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118 (Add a Comment)
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Moffat Tunnel (UP)
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Union Pacific
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Are you familiar with a moveable point frog as it related to a switch (turnout)? Most switches have a frog that is a single piece of steel with groves for wheel flanges. However, in situations where the turnout needs to support higher speed and/or it needs to support heavier trains, railroads will sometimes install a moveable point frog. Similar to the standard switch point, a moveable point frog requires a second turnout motor and it moves the frog back and forth, create a far smoother (and safer) turnout for heavier trains at higher speeds. This particular moveable point frog is located at CP DS007 (Arvada). When UP added a second main track between C&S Junction and Arvada, the added this turnout for coal trains.
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