was completed on this section in 1915. Bay Ridge Avenue opened on January 15, 1916, as part of an extension of the BMT Fourth Avenue Line from 59th Street to 86th Street. Station renovations 1920s On June 27, 1922, the New York State Transit Commission directed its engineers to prepare plans to lengthen the platforms at 23 stations on the lines of the Brooklyn–Manhattan Transit Corporation (BMT), the successor to the BRT, to accommodate eight-car trains. As part of the project, Bay Ridge Avenue's platforms would have been lengthened from to . Progress on the extensions did not occur until February 16, 1925, when the New York City Board of Transportation (NYCBOT) directed its engineers to prepare plans to lengthen the platforms at this and eleven other stations along the Fourth Avenue Line. It estimated the project's cost to be $633,000 () (). The BMT had been ordered by the Transit Commission to lengthen these platforms since September 1923. The NYCBOT received bids for the project on February 25, 1926. The contract was awarded to the Corson Construction Company for $345,021 (). The extensions opened on August 1, 1927. 1960s The city government took over the BMT's operations on June 1, 1940. In the 1960s, the New York City Transit Authority (NYCTA) started a project to lengthen station platforms on its lines in Southern Brooklyn to to accommodate 10-car trains. On July 14, 1967, the NYCTA awarded a contract to conduct test borings at eleven stations on the Fourth Avenue Line, including Bay Ridge Avenue, to the W. M. Walsh Corporation for $6,585 () in preparation of the construction of platform extensions (). The NYCTA issued an invitation for bids on the project to extend the platforms at stations along the Fourth Avenue Line between 45th Street station and Bay Ridge–95th Street, including this station, on May 3, 1968. However, work had already started on the platform extension project in February. As part of the renovation project, the station's platforms were extended at its northern and southern ends, for a total of , and the station's elaborate mosaic tile walls were covered over with white cinderblock tiles. The latter change, which was also made to 15 other stations on the BMT Broadway and Fourth Avenue Line, was criticized for being dehumanizing. The NYCTA spokesman stated that the old tiles were in poor condition and that the change was made to