Indian Gap, Texas is located at the far eastern end of the upper level
between Sweetwater, Texas and  River Oaks, Texas on the lower level.  
Single track enters Indian gap from the west and becomes double track as it
starts down grade through the gap behind the helix.  A  spur serves a
trackside oil storage facility.  The double track helix is right-hand running
such that the steeper grade on the inside track is for down grade traffic.  The
length of the track in the helix (7570' inside & 8107' outside) make this a
logical passing track and staging point between levels.  The real Indian Gap,
barely a bump in the road, is in hilly country 15 miles from the nearest
railroad track in Bozar, Texas.
Indian Gap, Texas
Castle Rock    Pacific
and
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