Open Air Armstrong Interlocking PlantNote the complicated switch work in the foreground. It was controlled from a switchmnan\'s ground-level shanty with levers activating rods to the switch points. I think it essentially controlled the throat of the large yard that was between Commonwealth Pier and Summer St.
Photographed by Ron DeFilippo, 1968.
Added to the photo archive by Ron DeFilippo, March 28, 2019.
Railroad: New Haven.
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