The Lake Street Transfer station was a rapid transit station on the Chicago "L" that linked its Lake Street Elevated with the Logan Square branch of its Metropolitan West Side Elevated Railroad from 1913 to 1951. The Lake Street and Metropolitan were both constructed in the 1890s by different companies. The two companies owning the lines, along with two others, unified their operations in the early 1910s; as part of the merger, the Lake Street's owner had to close its nearby station on Wood Street and build a new one to form a transfer with the Metropolitan. This transfer station had a double-decked construction (depicted), with the Metropolitan's infrastructure crossing over the Lake Street. This arrangement continued until the Dearborn Street subway opened on February 25, 1951, replacing the Logan Square branch in the area and leading to the station's closure. The site would eventually serve as the junction of the modern Pink Line to the Green Line. (Full article...)