East Dubuque, IL: East End Cabin: CN/IC plus BNSF/CB&Q and Aban/CGW

(Satellite)
NorthAmericanInterlockings:  model board,   table lever machine on the left,   office desk

The 2005 SPV RR Map shows that East Cabin was where the IC+CGW left the track through town that was shared with CB&Q. The map shows that Murphy was a little further east. The map shows Murphy was at the throat of a little yard. West Cabin was on the other end of the tunnel.

Photograph 4/60 by Dr. J W F Scimgeour via John Hinson
"The view looks south towards Chicago along the double track line used by trains of the Chicago, Burlington & Quincy and the Chicago Great Western Railroads, although the line was actually owned by the Illinois Central....All of this equipment was installed in 1946 by the Union Switch and Signal Co., at the joint expense of the IC, CB&Q and CGW railroads."

Steve Youngberg posted two photos with the comment: "Oh crud ! The East Cabin is gone. I suppose these are long gone also. I'm glad I got to see them and grab a couple of photos when I did. By the way it looked, they weren't going to last much longer."
Samuel Timothy East Cabin finally got torn down a few years ago. The interlocking rods and machine have been gone since 1994 when it was decommissioned. The only thing left in the cabin before it was leveled was the frame of the interlocking machine.
Dennis DeBruler Thanks for taking photos of the signalling pipelines. That is a solution as to how to do a 90-degree turn that I have never seen before.

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[I presume that the purpose of these linkages is to absorb expansion and contraction as the temperature changes.]

1955 Dubuque South Quadrangle @ 1:24,000

The cabin should have existed in 1946 because the equipment was installed then. But I don't see it in this photo. I was surprised to see the photo date of 1947 because most of the Illinois aerials were taken before WWII.

1947 Aerial Photo, at photo resolution