Bay Ridge Avenue station

Manhattan-bound prior to renovation

The Bay Ridge Avenue station was constructed as part of the Fourth Avenue Line. The plan for the line was initially adopted on June 1, 1905, before being approved by the Appellate Division of the Supreme Court of New York on June 18, 1906 after the Rapid Transit Commission was unable to get the necessary consents of property owners along the planned route.[6] The Rapid Transit Commission was succeeded by the New York State Public Service Commission (PSC) on July 1, 1907, and the PSC approved the plan for the line in October and November 1907.[7][8]

As part of negotiations between New York City and the Brooklyn Rapid Transit Company (BRT), and the Interborough Rapid Transit Company for the expansion of the city's transit network, the line was leased to a subsidiary of the BRT. The agreement, known as Contract 4 of the Dual Contracts, was signed on March 19, 1913.[7] In 1912, during the Dual System negotiations, the construction of an extension of the Fourth Avenue subway from 43rd Street to 89th Street, just south of the 86th Street station, was recommended. This recommendation was approved by the Board of Estimate on February 15, 1912. The PSC directed its chief engineer to create plans on June 14, 1912. The two contracts for the extension, Route 11B, were awarded on September 16, 1912, to the Degnon Construction Company for a combined $3.8 million (equivalent to $100.7 million in 2019).[7]

On January 24, 1913, construction began on Route 11B2, which includes this station and extends between 61st Street and 89th Street. Construction was completed on this section in 1915.[6] 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.[3][9]

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 495 feet (151 m) to 530 feet (160 m).[10][11] 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 (equivalent to $9,228,000 in 2019) (equivalent to $9,228,347 in 2019). The BMT had been ordered by the Transit Commission to lengthen these platforms since September 1923.[12] The NYCBOT received bids for the project on February 25, 1926.[13] The contract was awarded to the Corson Construction Company for $345,021 (equivalent to $4,983,000 in 2019) (equivalent to $4,982,700 in 2019).[14] The extensions opened on August 1, 1927.[15]

In the 1960s, the New York City Transit Authority (NYCTA) started a project to lengthen station platforms on its lines in Southern Brooklyn to 615 feet (187 m) to accommodate 10-car trains.[16] 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 (equivalent to $50,492 in 2019) in preparation of the construction of platform extensions (equivalent to $50,492 in 2019).[17] 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.[18]

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 85 feet (26 m),[16][19] and the station's elaborate mosaic tile walls were covered over with 8-by-16-inch (20 by 41 cm) 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 improve the appearance of stations and provide uniformity. Furthermore, it did not consider the old mosaics to have "any great artistic merit".[20]

As part of the Metropolitan Transportation Authority's 2015–2019 Capital Program, the station, along with thirty other New York City Subway stations, were scheduled to undergo a complete overhaul as part of the Enhanced Station Initiative. Updates were to include cellular service, Wi-Fi, USB charging stations, interactive service advisories and maps, improved signage, and improved station lighting.[21][22] From January to May 2016, Grimshaw Architects worked on a design for the station's renovation, with Arup Group acting as a consultant. The award for Package 1 of the renovations, which covered renovations at the Prospect Avenue, 53rd Street, and Bay Ridge Avenue stations on the BMT Fourth Avenue Line, was awarded on November 30, 2016.[23] Citnalta-Forte Joint Venture was selected to renovate the three stations under a $72 million design–build contract, the first such contract in the subway system's history.[24] The station closed on April 29, 2017 for these renovations[25][26] and reopened on October 13, 2017.[27]

The Fourth Avenue Line south of 59th Street, including the Bay Ridge Avenue and 77th Street stations, was built as a two-track structure under the west side of Fourth Avenue with plans for two future tracks on the east side of the street. The bridge across the Long Island Rail Road's Bay Ridge Branch to the north of this station, but under Fourth Avenue, was built for four tracks, but only the space for the two west tracks were ever used.[42] The tunnel leading up to each side of the bridge was built for two tracks only.[6][43] Daylight can briefly be seen from the bridge.[44]

The station is designed to allow the northbound platform to become the Manhattan-bound express trackway if the two additional tracks were built. To facilitate the conversion, the northbound platform is mostly columnless and is wider than the southbound platform. Furthermore, there is space underneath the platform for the trackway.[28][45][6]

The 68th Street exit-only staircase before reconstruction

The station's mezzanine is above the platforms with two staircases leading to each.[46][47]

From the mezzanine outside of fare control, two staircases lead to either southern corners of Bay Ridge and Fourth Avenues.[48]

The southbound platform has an additional entrance near its north end. Prior to the 2017 renovation, the entrance was exit-only, and consisted of one high entry-exit turnstile on the platform.[40][49][50] Two platform level turnstiles lead to a small landing, where a double-flight staircase goes up to the northwest corner of 68th Street and Fourth Avenue.[51][52]