23rd Street station (IRT Ninth Avenue Line)
23rd Street was a local station on the demolished IRT Ninth Avenue Line. It had two levels. The lower level was built first and had two tracks and two side platforms. The upper level was built as part of the Dual Contracts and had one track that served express trains that bypassed the station. It opened on October 21, 1873 and closed on June 11, 1940. The next southbound stop was 14th Street. The next northbound stop was 30th Street.
