The Black Bridge, which spans the Androscoggin River between Topsham and Brunswick, was built in 1909 as a replacement for a similar combination bridge built in 1880. Reader Bill Morin of Topsham researched the structures and believes this photo depicts the earlier bridge, as seen from Topsham looking toward Brunswick. Both bridges feature two decks. The top decks allow trains to cross the river. The lower decks accommodate foot and vehicular traffic. “The bridge built in 1880 is classified as a Warren or Triangular Truss with only four weight vertical struts and no diagonal bracing struts,” Morin wrote. “The bridge built in 1909 (still standing but closed to traffic) is classified as a subdivided Warren truss railroad bridge with a double set of verticals, having diagonal bracing struts, and another set of vertical hangers to support the vehicle use of the bridge. The truss portion and suspended deck spanning the Androscoggin River are 318 feet long.” The newer bridge reflects engineering advancements required to handle heavier trains and vehicles. The spire of the former St. John’s Catholic Church, barely visible behind the section of the bridge closest to Brunswick, helps date the photo. The church burned in 1912, meaning that this photo had to be taken prior to the fire.