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Research dossier · Places & Architecture

Interborough Rapid Transit Company

Defunct subway operator in New York City (1904–1940)

Architectural plans, a scale model, maps and brass measuring instruments
Places and architectureInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJul 6, 2026
Entity authorityQ2523955 ↗
Source-derived summary

The Interborough Rapid Transit Company (IRT) was the private operator of New York City's original underground subway line that opened in 1904, as well as earlier elevated railways and additional rapid transit lines in New York City. The IRT was purchased by the city on June 12, 1940, along with the younger BMT and IND systems, to form the modern New York City Subway. The former IRT lines (the numbered routes in the current subway system) are now the A Division or IRT Division of the Subway.

History

The first IRT subway ran between City Hall and 145th Street at Broadway, opening on October 27, 1904. It opened following more than twenty years of public debate on the merits of subways versus the existing elevated rail system and on various proposed routes.

Founded on May 6, 1902, by August Belmont, Jr., the IRT's mission was to operate New York City's initial underground rapid transit system after Belmont's and John B. McDonald's Rapid Transit Construction Company was awarded the rights to build the railway line in 1900, outbidding Andrew Onderdonk. The Manhattan Railway Company was the operator of four elevated railways in Manhattan with an extension into the Bronx.

On April 1, 1903, over a year before its first subway line opened, the IRT acquired the Manhattan Railway Company by lease, gaining a monopoly on rapid transit in Manhattan. The IRT coordinated some services between what became its subway and elevated divisions, but all the lines of the former Manhattan elevateds have since been dismantled.

In 1913, as a result of massive expansion in the city, the IRT signed the Dual Contracts with Brooklyn Rapid Transit (BRT) in order to expand the subway.

Editorial summary

This brief starts where responsible research should: with the source description of “Interborough Rapid Transit Company” as defunct subway operator in New York City (1904–1940). Everything that follows is an evidence route, not borrowed authority.

Editorial reviewA valuable geographic starting point for tracing changing names, boundaries, uses and administrative responsibility. The current lead gives the account dated anchors—1904, 1940, 1902, 1900—that can be checked directly. The linked authority record independently contributes the date 1904. The account is most persuasive where Interborough, Rapid and Transit can be independently traced.
Editorial analysis

Why this record matters

The subject matters to the places & architecture register because the source frames it as defunct subway operator in New York City (1904–1940). Its deeper value depends on whether names, dates, institutions and citations support that framing.

Evidence profile

The strongest evidence will usually combine a dated visual record with documents produced by the authority responsible for the place. The source revision retrieved here is dated Jul 6, 2026. The linked authority identifier is Q2523955. VIAF identifies the subject as 168376669. None of the 2 selected statements returned an explicit reference. The first chronological checks are 1904, 1940, 1902 and 1900.

Critical limits

Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.

Best used for
  • Historic place names
  • Jurisdictional context
  • Routes into maps and plans
Verify next

Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.

Three-step research path

  1. Establish the record: confirm the title “Interborough Rapid Transit Company”, its source revision and the description used here.
  2. Expand the search: follow Interborough Rapid Transit Company primary sources, Interborough Rapid Transit Company archive and Interborough research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Interborough Rapid Transit Company”?
  2. Which earlier names or jurisdictions may reveal additional records?
  3. Which authority defined the place, boundary or structure at the relevant date?
Subject index

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Source & attribution

This entry incorporates text from “Interborough Rapid Transit Company” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.