Cool, it looks like somebody put a loop of track in a gravel pit! If it's in New England, I'm thinking Allan Socea or Robert Jones might know, but I've lost all my old contact info. Maybe someone else can reach out to them, somebody must be in touch with Bob after reprinting Two Feet to Tidewater? I did pass the photo on to Bob Brown at The Narrow Gauge and Short Line Gazette, who is also a great fount of knowledge for all things weird, wonderful and Narrow Gauge, so maybe he'll be able to solve the mystery...