Locals are aware of the Frank Wood bridge replacement in Brunswick/Topsham.
Yesterday I noticed a crew excavating the road on the Brunswick side of the new bridge. In the hole were two parallel rusty strips of steel. I immediately suspected streetcar tracks. A bit of internet research today confirmed that while most of the Lewiston-Brunswick-Bath trolley line was ripped up for scrap during the Second World War, the tracks on the bridge itself and the approaches were simply paved over, being set in concrete and therefore too difficult to remove. The trolley and the bridge only coexisted for 5 years, the bridge having been constructed in 1932, and the trolley ceasing operations in 1937.
A pile of rail appeared late yesterday. To my uncalibrated eyeball it looked like perhaps 85 lb rail. Further reading suggests it is in fact only 70 lb rail.
The most remarkable aspect for me is just how far down the tracks were. I would guess 18 to 24 inches. That is a lot of layers of asphalt!