- The 1,594 Contract Three, Route 12 photographs show construction by the Interborough Rapid Transit Company (IRT) of the Eastern Parkway Line from Downtown Brooklyn along Flatbush Avenue and Eastern Parkway to Crown Heights (the 2 train, 3 train and 4 train). The route covers the following sections: Section 1, Flatbush Avenue from Atlantic Avenue to St. Marks Avenue; Section 1A, Flatbush Avenue from Park Place to Eighth Avenue; Section 1B, the area between Fulton Street, Flatbush Avenue, and Atlantic Avenue; Section 2, Plaza Street and Eastern Parkway to Nostrand Avenue; Section 3, Eastern Parkway from Nostrand Avenue to Utica Avenue. Photographs include views of brownstones along St. Felix Street and Hanson Place near the Brooklyn Academy of Music; storefronts along Flatbush Avenue; Grand Army Plaza; the Prospect Park Reservoir located on the corner of Plaza Street and Eastern Parkway (where the main branch of the Brooklyn Public Library now stands); and many views along Eastern Parkway.
- The 1,143 Contract Three, Route 29 photographs show construction by the Interborough Rapid Transit Company (IRT) of the Nostrand Avenue Branch of the Brooklyn Line between Crown Heights and Flatbush, Brooklyn (the 2 train and 5 train). The route covers the following sections: Section 1, Nostrand Avenue from Eastern Parkway to Church Avenue; Section 2, Nostrand Avenue from Church Avenue to Flatbush Avenue. Views include the residential and commercial stretches of Nostrand Avenue. There are many storefronts and brownstones, and some wooden row houses and detached wood frame cottages.
- The 451 Contract Three, Route 31 photographs show the construction by the Interborough Rapid Transit Company (IRT) of the New Lots Line or Livonia Avenue Line (the 3 train) in Brooklyn. The line runs from East 98th Street and Sutter Avenue to Livonia Avenue and New Lots Avenue. Most views are of the Livonia Avenue commercial district between Howard Avenue and Van Siclen Avenue in Brownsville, a Jewish neighborhood with many shop signs written in Yiddish. Construction of the elevated line resulted in a number of class action lawsuits between property owners and the City of New York because of the very close proximity between the elevated line and the storefronts. There are also many views of the future site and construction of the Livonia Yard, located south of New Lots Avenue between Hegeman and Lawrence Avenues and Elton and Linwood Streets. The area is mainly undeveloped plots of land with a few detached frame and carriage houses.
- The 2,860 Contract Four, Route 11 photographs show the construction by the Brooklyn-Manhattan Transit Corporation (BMT) of a portion of the Fourth Avenue Line from Flatbush Avenue to 95th street in Bay Ridge, Brooklyn (the N train and R train). The route covers the following sections: Section AE-1, Lafayette Avenue and Ashland Place, showing the area around the Brooklyn Academy of Music; Section A-1, Atlantic Avenue and Fourth Avenue to Fourth Avenue and Sackett Street; Section A-2, Fourth Avenue from Union Street to 4th Street; Section A-3, Fourth Avenue from 4th Street to 25th Street; Section A-4, Fourth Avenue from 26th Street to 41st Street; Section B-1, Fourth Avenue from 42nd Street to 61th Street; Section B-2, Fourth Avenue from 62nd Street to 86th Street; and Section B-3, Fourth Avenue from 87th Street to 95th Street. The views include some dramatic, bird's-eye shots of the excavation work that affected the neighborhoods of Park Slope, Sunset Park and Bay Ridge.
- The 566 Contract Four, Route 39 photographs show construction by the Brooklyn-Manhattan Transit Corporation (BMT) of the West End Line extension of the Fourth Avenue Line in Brooklyn from around 36th Street to Coney Island (the D train). The connection from the Fourth Avenue Line required the reconstruction of a portion of the line between 33rd Street and 38th Street. The route covers the following sections: Section 1, Fourth Avenue from 33rd Street to 38th Street, and along 38th Street to Tenth Avenue; Section 2, Tenth Avenue from 39th Street to 41st Street, New Utrecht Avenue from 41st Street to 86th Street, 86th Street from New Utrecht Avenue to Stillwell Avenue, and Stillwell Avenue to Avenue Y and the Coney Island Yard, ending up at the Coney Island-Stilwell Avenue Station. Photographs identified as "Job 467" show New Utrecht Avenue underneath the elevated tracks. Some photographs document lawsuits by property owners along the elevated portion of the line.
- The 377 Contract Four, Route 49 photographs show construction by the Brooklyn-Manhattan Transit Corporation (BMT) of the Culver Line from around Tenth Avenue and 37th Street along Gravesend Avenue (now McDonald Avenue) to Coney Island in Brooklyn (the F train). The route covers the following sections: Section 1-A, from west of Tenth Avenue between 37th Street and 38th Street to a point east of Tenth Avenue; Section 1, from east of Tenth Avenue parallel to 37th Street to Gravesend Avenue, and along Gravesend Avenue to south of Twenty-Second Avenue (now Bay Parkway); Section 2, Gravesend Avenue from Twenty-Second Avenue to Avenue X; and Section 3, from Shell Road and Avenue X to West 6th Street and Sheepshead Bay Road. The series also includes many photographs of the Coney Island Yard.
- The 198 Contract Four, Manhattan Bridge Extension photographs show construction by the Brooklyn-Manhattan Transit Corporation (BMT) of the Manhattan Bridge Branch of the Fourth Avenue Line along Flatbush Avenue in Brooklyn (the N train and Q train), including the former Myrtle Avenue Station, which was also known as the Gold Street Station.
- The 4,637 Independent Subway System (IND) Route 107 photographs show construction of the Crosstown Line (the G train) from Smith Street in Brooklyn to Court Square in Queens. The route is divided into the following sections: Section 5, Schermerhorn Street from Smith Street to near Flatbush Avenue; Section 6, Schermerhorn Street and Lafayette Avenue through the area around the Brooklyn Academy of Music to South Portland Avenue; Section 8, Lafayette Avenue from South Portland Avenue to Bedford Avenue; Section 9, Lafayette Avenue from Bedford Avenue to Marcy Avenue, and up Marcy Avenue and Union Avenue to Broadway; Section 10, Union Avenue from Broadway through McCarren Park to Manhattan Avenue; Section 11, Manhattan Avenue from Driggs Avenue to Green Street; Section 12, Manhattan Avenue from Freeman Street in Brooklyn across Newtown Creek to Jackson Avenue in Queens; Section 13 covers a portion of Nott Avenue (now 44th Drive) and Jackson Avenue to Court Square in Queens.
- The 3,626 Independent Subway System (IND) Route 109 photographs show construction of a portion of the Culver Line (the F train and G train) from Jay Street to Church Avenue in Brooklyn. The route covers the following sections: Section 1, Jay Street from Nassau Street to Willoughby Street; Section 2, Jay Street from Willoughby Street to Fulton Street, and Smith Street from Fulton Street to Baltic Street; Section 2A, Smith Street from Baltic Street to around 4th Street; Section 3, Smith Street from around 4th Street to 9th Street, and 9th Street from Smith Street to Fourth Avenue; Section 4, 9th Street from Fourth Avenue to Prospect Park West; Section 5A, Prospect Park West to Bartel-Pritchard Square and Prospect Park Southwest; Section 5B, Howard Place from Prospect Park Southwest to Prospect Avenue, and Prospect Avenue to Seeley Street Viaduct; Section 6, Prospect Avenue from Seeley Street Viaduct to Fort Hamilton Parkway, and Fort Hamilton Parkway and Caton Avenue to around East 4th Street; and Section 7, from around East 4th Street to Gravesend Avenue [McDonald Avenue], and Gravesend Avenue to Church Avenue.
- The 2,853 Independent Subway System (IND) Route 110 photographs show construction of the Fulton Street Line from Fulton Street and Lafayette Avenue to Rockaway Avenue in Brooklyn (the A train and C train). The route covers the following sections: Section 1, Fulton Street from Lafayette Avenue to Washington Avenue; Section 2, Fulton Street from Washington Avenue to Nostrand Avenue; Section 3, Fulton Street from Nostrand Avenue to Troy Avenue; Section 4, Fulton Street from Troy Avenue to Ralph Avenue; Section 5, Fulton Street from Ralph Avenue to Rockaway Avenue.
- The 668 miscellaneous photographs include those that are not identified by a specific contract or route number. Many photographs relate to construction on subway lines, including the BMT Brighton Line, BMT Myrtle Avenue Line, BMT Sea Beach Line, and BMT Jamaica Line, not otherwise represented in the Subway Construction Photograph Collection. Other photographs show construction of elevated railroads including the Third Avenue El and the Ninth Avenue El; planning for the Queens-Midtown Tunnel under the East River; construction of a bridge over the Harlem River; images relating to electric power supply and power plants; and a series of photographs of the Central Methodist Episcopal Church, Hanson Place and St. Felix Street, showing damage resulting from the construction of the IRT Eastern Parkway Line in Downtown Brooklyn, and the church's subsequent demolition. Thoroughfares documented in the series include East 44th Street and 57th Street in Manhattan, Southern Boulevard in the Bronx, and Fulton Street in Brooklyn.