Good ol' Wikipedia.... Here's some excerpts from their very good article on the Frank J. Wood bridge - "The Topsham-Brunswick Bridge, the sixth bridge, was constructed in 1897 using stronger iron; however, it was deemed unusable in 1927 after a trolley jumped its tracks and destroyed some of its supports. The Frank J. Wood Bridge opened in 1932 and was the seventh bridge to occupy the location...... In 1931, the state of Maine commissioned Boston Bridge Works, to construct a new bridge over the Androscoggin River to replace the old Topsham-Brunswick Bridge that was deemed unsafe. The bridge was made from 1,500 short tons (1,400 t) of steel, as well as concrete, and was originally constructed with tram rails twenty feet apart....In 1944, the rails from the tram line were paved over with asphalt after the Maine Central Railroad abandoned the tracks in 1937."......
After an initial review of the bridge, in 2016, from MaineDOT and the Federal Highway Administration, stated the bridge would not be eligible for the National Register of Historic Places. in 2017, they reevaluated and determined that the Frank J. Wood Bridge was eligible both as an individual historic place and as part of the Brunswick Commercial Historic District. Eligibility is determined by how important it is to local transportation, specifically because it's connected to regional interurban trolley lines. The Federal Highway Administration stated "While most of the features associated with the interurban line are no longer withstanding, the standard width and height of the bridge, set specifically to accommodate the interurban line, was adequate integrity to convey that significance." I've included a postcard, date unknown which more clearly shows the bridge roadbed before the tracks were covered in 1944. The tracks and the extra bridge reinforcement outboard of them is more clearly shown. These features and the lack of overhead wires dates the image to between 1937 and 1944.
