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Ackroyd 00870-2. "Guilds Lake aerials. For Union Pacific. August 6, 1948." Looking south at the land between NW 26th Ave. and NW 29th Ave. including Portland Terminal Railroad and Schnitzer junkyard. The closest white building left-center with a smokestack is Hercules Powder, 3366 NW Yeon. Above Yeon, the vacant land is the subject of this photo, it is the land on the south side of NW Yeon Ave. at the intersection of NW 26th Ave., which is address numbered in the 3200s.