Layout
The station has two island platforms, situated between the express and local tracks in each direction. A fifth track once existed between the two express tracks. The fifth track was removed in 1956. Original plans called for this to be a local station on a three-track line, but before it opened the two outer local tracks were added. Fare control is in an upper mezzanine, with a crossunder via part of an unused lower level platform. Next to this platform is a single unused trackway under the southbound local track.
This unused trackway was part of several plans for connecting the line to other proposed lines. At its north end, this trackway splits from the southbound local track just south of Hoyt Street, and starts heading downgrade. The track was never laid. At the curve in the subway from Fulton Street to Flatbush Avenue, the trackway curves under the southbound local track, and is joined by another unused trackway heading north along Flatbush Avenue for a proposed Manhattan Bridge connection (which was later built for the BMT, though this connection may have still been planned when that line was built, as the DeKalb Avenue station was designed to allow for it). After the lower Nevins Street platform, a trackway splits to the east for a subway under Lafayette Avenue; this was later built as part of the IND Fulton Street and Crosstown Lines. Just beyond this split, at Lafayette Avenue, the trackway is cut by the IND when the IND was built from 1929 to 1937. On the other side, it rises again to merge with the southbound local track in the midst of the complicated switch layout just north of Atlantic Avenue – Barclays Center. Between this merge and Atlantic Avenue is another unused trackway, splitting from the local track towards a subway under Fourth Avenue (later built as the BMT Fourth Avenue Line). This trackway and another trackway (both built for the same proposed subway) end at the same level, under Fourth Avenue, just west of the Pacific Street on the current BMT Fourth Avenue Line and a few feet higher.
On the northbound side, the connection provided by the lower level trackway would have been along the northbound local track (which was not in the original plans). The trackway on this side begins by curving from Fourth Avenue under the line. The place it used to rise is covered, as the trackway beyond that point is now used for the northbound local track. The ramp was covered in July 1963, and was made into a level trackway. This ramp was supposed to be northbound trackway of the proposed IRT Fourth Avenue Subway (before the BRT/BMT was built). The northbound local and express tracks were rearranged by November 1963.
Before Nevins Street, there is a bellmouth that merges into northbound local track for the proposed Lafayette Avenue subway. After Nevins Street, at the curve, there is a short section of wall with no columns, that could be opened up. This was also a proposed connection to the Manhattan Bridge.
Just north of Atlantic Avenue – Barclays Center is another unused trackway, merging into the northbound local track from the LIRR's Atlantic Terminal. A trackway from the southbound tracks existed until 1911, when the platforms at Atlantic Avenue were lengthened.
Until a recent renovation of Nevins Street, the rest of the lower platform was visible from the crossunder, but the temporary wall has been replaced with a tile wall. Access to the unused platform is via a cellar-type door at the north end of each platform, as well as doors from the crossunder.
For a time in the early 1960s, a false wall was installed to seal the ramp to the Nevins Street lower level. The false wall was taken down in a later date though for unknown reasons.
The Nevins Street lower level platform had, over the years, become a storage area for various work projects.
In the station is a "Nevins St." mosaic. The mezzanine walls feature a mosaic frieze by Anton von Dalen, installed in 1997 and entitled Work & Nature. The mosaic is 14 inches by 83 feet along both walls of the mezzanine. The work is in the tones of soft blue, green, and ochre, like the original platform mosaics. It features stenciled silhouettes in black of a woman operating a sewing machine, a mother taking care of a child, a man planting a tree, an architect reading a blueprint, a female executive addressing a meeting, and famous musician Furry Lewis. All of these characters symbolize, according to the artist, "pride, dignity, and beauty surrounding all work".
Read more about this topic: Nevins Street (IRT Eastern Parkway Line)