Thanks, don't remember the staging yard, but near.
Amtrak America, 1971-Present.
Correction it should have been Naugatuck Valley.
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Could someone please put up an image of the track plan for David Popp's original Nagutuck Valley, the one that fits on a door. I've seen the track plan for later versions but I'm having a hard time visualizing what the Prospect Hill side looked like before the extension.