Joralemon Street Tunnel
1913 postcard illustrating the tunnel and City Hall station
LineIRT Lexington Avenue Line (4 and ​5 trains)
LocationEast River between Manhattan and Brooklyn, New York
Coordinates40°41′49″N 74°00′26″W / 40.69694°N 74.00722°W / 40.69694; -74.00722Coordinates: 40°41′49″N 74°00′26″W / 40.69694°N 74.00722°W / 40.69694; -74.00722
SystemNew York City Subway
OpenedJanuary 9, 1908; 113 years ago (January 9, 1908)[1]
OperatorMetropolitan Transportation Authority
Length6,550 feet (2,000 m)
No. of tracks2
Width16.67 feet (5.1 m) (exterior)
15.5 feet (4.7 m) (interior)
Joralemon Street Tunnel
ArchitectWilliam Barclay Parsons; Andrew McDonald, et al.
MPSNew York City Subway System MPS
NRHP reference No.06000015[2]
Added to NRHPFebruary 9, 2006

The Joralemon Street Tunnel, originally the Brooklyn–Battery Tunnel, is a pair of tubes carrying the IRT Lexington Avenue Line (4 and ​5 trains) of the New York City Subway under the East River between Bowling Green Park in Manhattan and Brooklyn Heights in Brooklyn, New York City. The Joralemon Street Tunnel was an extension of the Interborough Rapid Transit Company (IRT)'s first subway line from the Bowling Green station in Manhattan to the IRT Eastern Parkway Line in Brooklyn.

The tubes were constructed using the shield method and are each 6,550 feet (2,000 m) long and 15.5 feet (4.7 m) wide. The interiors are lined with cast-iron "rings" formed with concrete. The tubes descend 91 to 95 feet (28 to 29 m) below the mean high water level of the East River, with a maximum gradient of 3.1 percent. During the tunnel's construction, a house at 58 Joralemon Street in Brooklyn was converted into a ventilation building and emergency exit.

The Joralemon Street Tunnel was the first underwater subway tunnel connecting Manhattan and Brooklyn. It was built by the IRT as part of Contract 2, which the IRT signed with the Rapid Transit Commission in 1902. Construction commenced in 1903 and the tubes were completed by 1907, despite various construction accidents and engineering errors that required part of the tunnel to be rebuilt. The first train ran through the Joralemon Street Tunnel in November 1907, and the tunnel opened for passenger service on January 9, 1908. It was listed on the National Register of Historic Places in 2006.


The Joralemon Street Tunnel, consisting of two parallel tubes, crosses the East River, connecting the New York City boroughs of Manhattan in the west and Brooklyn in the east. Completed in 1908 for the Interborough Rapid Transit Company (IRT), it was the first subway tunnel between the two boroughs,[3] and was built as part of Contract 2 of the first New York City Subway line.[4][5] The tubes extend between South Ferry in Lower Manhattan and Joralemon Street in Brooklyn Heights, Brooklyn,[5] with the route of the tunnel curving at either bank of the river.[6] The primary engineer for the tunnel was William Barclay Parsons, who designed most of the early IRT system,[3] while Clifford Milburn Holland served as the assistant engineer.[7] The New York Tunnel Company was the primary contractor.[8] When completed, it was known as the Brooklyn–Battery Tunnel, a name subsequently used for a vehicular tunnel slightly to the south.[9]

Each tube is approximately 6,550 feet (2,000 m) long,[5][6][10][a] with the sections under the river being 4,500 feet (1,400 m) long.[3] The tunnels have an outside diameter of 16.67 feet (5.1 m)[12] and an inside diameter of 15.5 feet (4.7 m).[5][12][13] The centers of the tubes were placed about 28 feet (8.5 m) apart, except under Joralemon Street, where that distance is 26 feet (7.9 m).[14] Both tubes have a maximum gradient of 3.1 percent.[5][13][15] The lowest points on the tubes are about 91 to 95 feet (28 to 29 m) below the mean high water level of the East River.[13][15][16][b] About 700 feet (210 m) of the tunnel in Brooklyn is above the water level of the river.[16] While the Manhattan end of the tunnels was constructed through solid rock, the Brooklyn end was constructed through sandy ground.[18][19]

The steelwork for Contract 2 tunnels, including the Joralemon Street Tubes, was manufactured by the American Bridge Company.[20] The tubes are lined with "rings" 22 inches (560 mm) wide, each of which is made of "plates" that form a perfect circle.[6][12][17][c] Each ring has a minimum thickness of 1.125 inches (28.6 mm) and has flanges that are 7 to 7.5 inches (180 to 190 mm) deep.[6][13][14] The rings within the rocky sections, and within the segments of the tunnel above mean high water, generally weigh less than those placed within sandy ground or underneath the riverbed.[13] After the rings were placed, they were covered with concrete, and bench walls with cable ducts were placed aside each tube. Piping and drainage systems were also installed.[14][15] Pilings were sunk for additional reinforcement.[13]

Associated structures

The Manhattan end of the tunnel is the Bowling Green station of the IRT Lexington Avenue Line. North of Bowling Green, the subway runs under Broadway to connect to the original subway line. The Brooklyn end is at Joralemon and Clinton Streets in Brooklyn, where a cut-and-cover tunnel connects to the Borough Hall station of the IRT Eastern Parkway Line.[8][13][16]

South Ferry ventilation shaft
South Ferry ventilation shaft

Two construction shafts were built for the tunnel: one in Manhattan at South Ferry, and the other in Brooklyn at Henry and Joralemon Streets. Each shaft was built with dimensions of about 14 by 45 feet (4.3 by 13.7 m).[6][13] The South Ferry construction shaft became a ventilation shaft and consists of a 10-foot-high (3.0 m) enclosure inside the Battery.[14] However, the Henry Street construction shaft was infilled.[8][14] A ventilation and emergency exit shaft was built inside a row house at 58 Joralemon Street, near Willow Street.[21][22][23] 58 Joralemon Street was an actual house, built in 1847,[21] but was purchased by the IRT in 1907 and gutted.[24]



Planning for the city's first subway line dates to the Rapid Transit Act, authorized by the New York State Legislature in 1894.[25] The subway plans were drawn up by a team of engineers led by William Barclay Parsons, chief engineer of the Rapid Transit Commission (RTC). It called for a subway line from New York City Hall in lower Manhattan to the Upper West Side, where two branches would lead north into the Bronx.[26] A plan was formally adopted in 1897.[27] The Rapid Transit Subway Construction Company (RTSCC), organized by John B. McDonald and funded by August Belmont Jr., signed Contract 1 with the RTC in February 1900,[28] in which it would construct the subway and maintain a 50-year operating lease from the opening of the line. Belmont incorporated the IRT in April 1902 to operate the subway.[29]

A subway under the southernmost section of Broadway between the Battery and City Hall was not included in Contract 1. Several days after Contract 1 was signed, the Board of Rapid Transit Railroad Commissioners instructed Parsons to evaluate the feasibility of extending the subway south to South Ferry and then to Brooklyn. On January 24, 1901, the Board adopted a route that would extend the subway from City Hall to the Long Island Rail Road (LIRR)'s Flatbush Avenue terminal station (now known as Atlantic Terminal) in Brooklyn, via a tunnel under the East River, then running under Joralemon Street, Fulton Street, and Flatbush Avenue in Brooklyn to Atlantic Terminal.[30][31][32] It was estimated that this second route would cost $9 million (equivalent to $227 million in 2019[d]), which the RTC could not yet fully fund. However, the RTC expected that there would be competition for the route, which connected two large business districts and the city's two most populous boroughs. The Brooklyn Rapid Transit Company, which monopolized surface and elevated transit in Brooklyn, would be obliged to bid to maintain its monopoly. The Board also knew that Belmont would submit a low bid to retain control of underground rapid transit for himself and his construction company.[33] Contract 2, giving a lease of 35 years, was executed between the commission and the Rapid Transit Construction Company on September 11, 1902.[34]


Construction on the Manhattan side began on March 4, 1903, and on the Brooklyn side on July 10, 1903.[11] While the RTC had allocated $2 million to the tubes' construction (equivalent to $47 million in 2019[d]), the project was estimated to cost $10 million (equivalent to $235 million in 2019[d]) by November 1903.[35] Construction shafts were dug at South Ferry and Joralemon Street.[17][18] Six tunneling shields were driven: two proceeding east from Manhattan and two each proceeding west and east from Brooklyn.[13] The tunneling shields were each 16.95 feet (5 m) in diameter and 9.5 feet (2.9 m) long, and were pushed at a rate of 5 to 12 feet (1.5 to 3.7 m) per day.[36] All of the headings were driven within a pressurized environment. After the headings had been driven approximately 100 feet (30 m), two thick brick walls were constructed at each end, creating air locks. An upper lock gave workers access to the heading, while a lower lock allowed spoils to be extracted from the excavation and through the shafts on either side.[6][18] The work was performed by three groups of men, each working eight-hour shifts.[13][17]

After the shields were driven, temporary wooden beams were placed to reinforce the excavations until the cast-iron tubes were assembled.[18] The cast iron lining was assembled via a hydraulically powered, traveling device with a "radial arm"; the device was supported on brackets that ran along the completed section of the lining. Once it had been positioned, the radial arm would lift and orient a plate into position. Three workers would bolt the plates to the already assembled lining, while a fourth would operate the device. Afterward, a compressed-air grouting machine would squeeze grout into small holes within the lining, filling the spaces between the rock and the cast-iron rings. The holes in the lining were then plugged.[12][18][37] Some of the cast-iron plates were cracked while they were placed, but Parsons maintained that the tubes were safe.[13][38]

This house at 58 Joralemon Street was purchased and converted into a ventilation shaft for the Joralemon Street Tunnel.
This house at 58 Joralemon Street was purchased and converted into a ventilation shaft for the Joralemon Street Tunnel.

The excavations caused shifting of sandy soil, which damaged some buildings in Brooklyn along the tunnel's route, including the house of the Brooklyn borough president.[39] In June 1904, the RTC said the city was not responsible for repairs to the houses, although contractors were digging another shaft to relieve air pressure in the excavation.[40][41] The shafts at Garden Place and at Henry Street were sealed, and new shafts at Furman Street on the waterfront were being constructed, by the end of 1904.[8] The property damage led the New York City government to pay out monetary compensation starting in mid-1906.[42] Numerous other accidents occurred during the course of construction. In March 1905, one of the tubes suddenly lost pressure in a "blowout", propelling a worker through the mud and into the air, although he survived.[43] That December, a blast caused the tunnel to cave-in at the Battery, though no one died.[44] A cave-in occurred in one of the tubes in August 1906,[45] and two months later, another blast killed one worker.[46] Another issue was the need to create a new ventilation shaft on the Brooklyn side after the construction shaft was sealed; the IRT unsuccessfully attempted to take property on Hicks and Furman Streets. By 1907, the IRT had bought a house at 58 Joralemon Street to serve as the ventilation plant.[24]

Continuing with the excavations, the contractors found the remains of a ship under Joralemon Street in March 1905.[47] By that August, the excavations had reached the midpoint of the riverbed.[48] During this time, Parsons and his successor George S. Rice discovered that the ceilings of the tubes had flattened downward; trains could still run through the tunnels, but the roofs would be scraped at high speeds. Less urgently, the tunnels in Brooklyn had descended beneath the specified gradient, which if uncorrected would result in an uneven grade. These difficulties had come to the attention of mayor George B. McClellan Jr. by mid-1906.[49][50] To prevent further delays, contractor New York Tunnel Company chose to proceed, with plans to rebuild the defective tunnel sections later.[51] Parsons blamed the contractor for the defective tube ceilings, stating that the New York Tunnel Company had allowed the quicksand above the tubes to settle, although the contractor denied responsibility.[52]

The two sections of the northern tube were holed-through on December 15, 1906,[53] followed by the southern tube on March 1, 1907.[54] Starting in mid-1907, some 1,957 feet (596 m) of the north tube and 962 feet (293 m) of the south tube were reconstructed, with the lower half of each cast-iron ring being replaced with an elliptical section.[13][e] The New York Tunnel Company became insolvent that May, and a receiver was appointed to oversee the completion of the tunnel.[56] By that July, the city's Public Service Commission ordered that additional shifts of workers be hired for the Joralemon project so that test trains could start running through the tunnels within three months.[57] The first test train, carrying officials, reporters, and construction engineers, ran through the Joralemon Street Tunnel to Brooklyn at 12:40 p.m. on November 27, 1907.[15][58]


The beginning of the tunnel just south of the Bowling Green station
The beginning of the tunnel just south of the Bowling Green station

The Joralemon Street Tunnel and the Borough Hall station opened to the public on January 9, 1908, with ceremonies, firecrackers, and a musical performance on the steps of Brooklyn Borough Hall.[1][13][59] Initially, the tunnel was served by express trains along both the West Side (now the Broadway–Seventh Avenue Line to Van Cortlandt Park–242nd Street) and East Side (now the Lenox Avenue Line). The express trains, running to Atlantic Avenue, had their northern terminus at 242nd Street or West Farms (180th Street).[60] Lenox local trains to 145th Street served the tunnel during late nights.[61] In Brooklyn, service proceeded beneath Joralemon, Fulton, and Willoughby Streets, originally terminating at Atlantic Avenue.[5] The opening of the Joralemon Street Tunnel, as well as the completion of the Williamsburg Bridge and Manhattan Bridge to the north, relieved traffic from the Brooklyn Bridge and from East River ferries, which previously had provided the only passenger service between Manhattan and Brooklyn.[62]

The Dual Contracts were formalized in early 1913, specifying new lines or expansions to be built by the IRT and the BRT.[63] As part of the Dual Contracts, the IRT extended the Lexington Avenue Line north of Grand Central–42nd Street, dividing the original IRT line into an "H"-shaped system. The "H" system opened in 1918, and all Joralemon Street Tunnel services were sent via the Lexington Avenue Line.[64] The following year, the Clark Street Tunnel opened north of the Joralemon Street Tunnel, providing service from the newly extended Broadway–Seventh Avenue Line to the IRT's Brooklyn line.[65] Another tunnel, the Montague Street Tunnel, was built north of the Joralemon Street Tunnel as part of the Dual Contracts, opening in 1920 as part of the BRT system.[66] Also in 1920, the Eastern Parkway Line was extended east of Atlantic Avenue; the Joralemon Street Tunnel services, which had previously served all stops on the Eastern Parkway Line, became express services.[67][68]

In the latter half of the 20th century, several derailments occurred in the Joralemon Street Tunnel. A Brooklyn-bound train derailed during the morning rush hour of January 1, 1965, blocking service for half a day, although no one was harmed.[69] During the evening rush hour of March 17, 1984, another train derailed with 1,500 passengers while traveling over a track that was being repaired, but again, no one was killed or seriously injured.[70][71]

The Joralemon Street Tunnel was added to the National Register of Historic Places in 2006.[72] It was one of seven East River subway tunnels flooded on October 29, 2012, as Hurricane Sandy's storm surge inundated Lower Manhattan. The Metropolitan Transportation Authority prioritized draining and restoring service to the Joralemon Street Tunnel and Rutgers Street Tunnel, which carried some of the system's busiest routes.[73][74] The storm water was cleared from the tunnel two days afterward,[75] and the tunnel reopened within the week.[74] The tunnels were more extensively repaired during 2016 and 2017 for $75 million.[76][77]



  1. ^ According to the Brooklyn Daily Eagle, the north tube used 6,747 feet (2,056 m) of cast iron, while the south tube used 6,766 feet (2,062 m) of such material.[11]
  2. ^ Sources disagree on how thick the river bed above the tubes is. According to a 1904 article in the Engineering Record, the river bed above each tube is 6 to 30 feet (1.8 to 9.1 m) thick,[6] but a 1903 account from The New York Times gives a minimum thickness of 25 to 30 feet (7.6 to 9.1 m).[17] A Brooklyn Daily Eagle article in 1907 stated that the maximum depth of the tube was 40 feet (12 m) beneath the river bed.[15]
  3. ^ According to the National Park Service, there are eight plates in each ring.[10] According to The New York Times and the Engineering Record, there are nine plates, but the topmost plate of each ring is smaller than the rest and is similar in function to the keystone of an arch.[17][16]
  4. ^ a b c Thomas, Ryland; Williamson, Samuel H. (2020). "What Was the U.S. GDP Then?". MeasuringWorth. Retrieved September 22, 2020. United States Gross Domestic Product deflator figures follow the Measuring Worth series.
  5. ^ A total of 2,919 feet (890 m) was reconstructed;[13] the National Park Service cites this figure as the length of the north tube that was reconstructed.[55]


  1. ^ a b "Brooklyn Joyful Over Its Tunnel". The New York Times. January 10, 1908. ISSN 0362-4331. Retrieved March 6, 2010.
  2. ^ "National Register Information System". National Register of Historic Places. National Park Service. January 23, 2007.
  3. ^ a b c National Park Service 2006, p. 7.
  4. ^ Gasparini, D. A. (February 2006). "Battery-Joralemon Street Tunnel". Journal of Performance of Constructed Facilities. American Society of Civil Engineers. 20 (1): 92–107. doi:10.1061/(asce)0887-3828(2006)20:1(92). Archived from the original on May 30, 2012. Retrieved October 12, 2007.
  5. ^ a b c d e f Scott 1978, p. 261.
  6. ^ a b c d e f g "The New York and Brooklyn Tunnel for the Rapid Transit Railroad-I". Engineering Record. 49 (10): 304–306. March 5, 1904.
  7. ^ Aronson, Michael (June 15, 1999). "The Digger Clifford Holland". New York Daily News. Retrieved July 2, 2010.
  8. ^ a b c d "One Tunnel Tube Finished to River". Brooklyn Citizen. December 3, 1904. p. 1. Retrieved January 5, 2021 – via open access.
  9. ^ New York City Transit: A Memorandum Addressed to the Public Service Commission of the First District. City Club of New York. 1907. Retrieved November 5, 2012.
  10. ^ a b National Park Service 2006, p. 3.
  11. ^ a b "Statistics of East River Tunnel". Brooklyn Daily Eagle. January 9, 1908. p. 26. Retrieved January 5, 2021 – via open access.
  12. ^ a b c d National Park Service 2006, pp. 3–4.
  13. ^ a b c d e f g h i j k l m n "Construction of the Tunnel Presented Difficult Problems". Brooklyn Daily Eagle. January 9, 1908. pp. 26, 27.
  14. ^ a b c d e National Park Service 2006, p. 4.
  15. ^ a b c d e "First Train Run Through Tunnel". Brooklyn Daily Eagle. November 27, 1907. p. 1. Retrieved January 5, 2021 – via open access.
  16. ^ a b c d "Tunneling Under the East River, New York". Engineering Record. 43 (6): 128. February 9, 1901.
  17. ^ a b c d e "Tunnel Work in Brooklyn With Street Undisturbed; Good Progress Made Under Joralemon Street Toward Borough Hall During the Past Month" (PDF). The New York Times. October 11, 1903. p. 26. ISSN 0362-4331. Retrieved January 4, 2021.
  18. ^ a b c d e Scott 1978, p. 262.
  19. ^ "Tunnel Shaft in Manhattan Now Down to River Level". Brooklyn Standard Union. May 10, 1903. p. 10. Retrieved January 5, 2021 – via open access.
  20. ^ "Modern Engineer's Magic Wand Transforms Atlantic Avenue". Brooklyn Citizen. July 14, 1904. pp. 13, 19 – via open access.
  21. ^ a b Gill, John Freeman (December 26, 2004). "A Puzzle Tucked Amid the Brownstones". The New York Times. ISSN 0362-4331. Retrieved January 4, 2021.
  22. ^ Hays, Tom; Sherman, Samantha (April 12, 2010). "Subterranean Police Presence Protects Subways From Terror". The Brooklyn Daily Eagle. Archived from the original on July 1, 2010.
  23. ^ National Park Service 2006, pp. 4–5.
  24. ^ a b "Fresh Air for Tunnel: Plant Site Purchased". New-York Tribune. March 23, 1907. p. 4. Retrieved January 5, 2021 – via open access.
  25. ^ Walker 1918, pp. 139–140.
  26. ^ "Interborough Rapid Transit System, Underground Interior" (PDF). New York City Landmarks Preservation Commission. October 23, 1979. p. 3. Retrieved November 19, 2019.
  27. ^ Walker 1918, p. 148.
  28. ^ Report of the Board of Rapid Transit Railroad Commissioners for the City of New York For The Year Ending December 31, 1904 Accompanied By Reports of the Chief Engineer and of the Auditor. Board of Rapid Transit Railroad Commissioners. 1905. pp. 229–236.
  29. ^ Walker 1918, p. 182.
  30. ^ Walker 1918, p. 221.
  31. ^ Report of the Board of Rapid Transit Railroad Commissioners For And In The City of New York Up to December 31, 1901. Board of Rapid Transit Railroad Commissioners. 1902. pp. 83–84.
  32. ^ Scott 1978, pp. 260–261.
  33. ^ Katz, Wallace B. (1979). "The New York Rapid Transit Decision of 1900: Economy, Society, Politics" (PDF). Historic American Engineering Record. p. 111 (PDF p. 112). This article incorporates text from this source, which is in the public domain.CS1 maint: postscript (link)
  34. ^ Walker 1918, p. 179.
  35. ^ "East River Loss Estimated at $8,000,000". Brooklyn Daily Eagle. November 25, 1903. p. 2. Retrieved January 5, 2021 – via open access.
  36. ^ "Trains Under East River Before End of Next Year". Brooklyn Daily Eagle. March 27, 1904. p. 11. Retrieved January 5, 2021 – via open access.
  37. ^ "The New York and Brooklyn Tunnel for the Rapid Transit Railroad-II". Engineering Record. 49 (11): 329–331. March 12, 1904.
  38. ^ "Brooklyn Not Sure Tunnel Is Safe; Mayor Is Asked to Order an Investigation of Work on the East River Tubes" (PDF). The New York Times. June 3, 1907. p. 1. ISSN 0362-4331. Retrieved January 5, 2021.
  39. ^ "Fine Mansion Sinking Into Brooklyn Tunnel". Brooklyn Daily Eagle. March 4, 1904. p. 20. Retrieved January 5, 2021 – via open access.
  40. ^ "Property Owners Must Make Their Own Repairs". Brooklyn Daily Eagle. June 17, 1904. p. 5. Retrieved January 5, 2021 – via open access.
  41. ^ "Encounter a Snag in Joralemon St. Tunnel". Brooklyn Standard Union. June 17, 1904. p. 12. Retrieved January 5, 2021 – via open access.
  42. ^ "Jacobs Tunnel Report Refused to Mr. Rice". Brooklyn Daily Eagle. June 7, 1906. p. 2. Retrieved January 5, 2021 – via open access.
  43. ^ "Shot Out of River". New York Sun. March 28, 1905. p. 1. Retrieved January 5, 2021 – via open access.
  44. ^ "East River Tunnel Caves at the Battery; Elevated Railroad Structure and Subway Are Menaced" (PDF). The New York Times. December 24, 1905. p. 1. ISSN 0362-4331. Retrieved January 4, 2021.
  45. ^ "East River Breaks in on Nine Tube Workers; a Rush for Safety Follows the "Blow-out" of Quicksand" (PDF). The New York Times. August 16, 1906. p. 14. ISSN 0362-4331. Retrieved January 5, 2021.
  46. ^ "Dead in East River Tunnel; Workman Killed and Three Injured by a Blast of Dynamite" (PDF). The New York Times. October 1, 1906. p. 1. ISSN 0362-4331. Retrieved January 4, 2021.
  47. ^ "Find Old Ship Under Street". Brooklyn Citizen. March 11, 1905. p. 1. Retrieved January 5, 2021 – via open access.
  48. ^ "Under-river Subway More Than Half Done; Diggers From the Battery at the Middle of the Stream" (PDF). The New York Times. August 4, 1905. p. 12. ISSN 0362-4331. Retrieved January 4, 2021.
  49. ^ "Brooklyn Tunnel Botched, Mayor Tells R. T. Board". Brooklyn Standard Union. May 18, 1906. p. 3. Retrieved January 5, 2021 – via open access.
  50. ^ "Tunnel Bungling Will Cost 1 Year". Brooklyn Daily Eagle. May 18, 1906. pp. 1, 2.
  51. ^ "Brooklyn Tunnel Ready by January 1, Sure; Engineer Rice Tells About Those Defects the Mayor Found" (PDF). The New York Times. May 25, 1906. p. 20. ISSN 0362-4331. Retrieved January 5, 2021.
  52. ^ "Tunnel Repairs Dispute.; Suit May Result, as Contractors Don't Want to Pay for the Work" (PDF). The New York Times. September 9, 1907. p. 16. ISSN 0362-4331. Retrieved January 5, 2021.
  53. ^ "First Trip Through New East River Tube; Officials Cross the Subway Tunnel to Brooklyn" (PDF). The New York Times. December 15, 1906. p. 6. ISSN 0362-4331. Retrieved January 5, 2021.
  54. ^ "Subway Clear to Brooklyn; Last of Tube Headings Joined by Pushing Dick Creedon Through the Earth" (PDF). The New York Times. March 2, 1907. p. 6. ISSN 0362-4331. Retrieved January 5, 2021.
  55. ^ National Park Service 2006, p. 5.
  56. ^ "Tunnel Co. Insolvent: Receiver Appointed for Corporation Building Battery Tube". New-York Tribune. May 24, 1907. p. 11. Retrieved January 5, 2021 – via open access.
  57. ^ "East River Tunnel to Open in October; Subway Trains Will Probably Run to Atlantic Avenue, Brooklyn, a Month Later". The New York Times. July 27, 1907. ISSN 0362-4331. Retrieved January 4, 2021.
  58. ^ "Train Goes Through the Battery Tunnel; Return Trip From Borough Hall to Manhattan Made in Five Minutes" (PDF). The New York Times. November 28, 1907. p. 1. ISSN 0362-4331. Retrieved January 5, 2021.
  59. ^ "Brooklyn Tunnel is Formally Opened". Brooklyn Citizen. January 9, 1908. pp. 1, 2 – via open access.
  60. ^ The Merchants' Association of New York Pocket Guide to New York. Merchants' Association of New York. March 1906. pp. 19–26.
  61. ^ "Tunnel to Brooklyn to Open Next Week; Subway Extension Under East River May Begin Carrying Passengers on Thursday" (PDF). The New York Times. January 4, 1908. p. 1. ISSN 0362-4331. Retrieved January 5, 2021.
  62. ^ Hood, Clifton (1978). "The Impact of the IRT in New York City" (PDF). Historic American Engineering Record. p. 153. Retrieved December 20, 2020. This article incorporates text from this source, which is in the public domain.CS1 maint: postscript (link)
  63. ^ "Money Set Aside for New Subways; Board of Estimate Approves City Contracts to be Signed To-day with Interboro and B.R.T." (PDF). The New York Times. March 19, 1913. ISSN 0362-4331. Retrieved November 10, 2017.
  64. ^ "Open New Subway Lines to Traffic; Called a Triumph — Great H System Put in Operation Marks an Era in Railroad Construction — No Hitch in the Plans — But Public Gropes Blindly to Find the Way in Maze of New Stations — Thousands Go Astray — Leaders in City's Life Hail Accomplishment of Great Task at Meeting at the Astor" (PDF). The New York Times. August 2, 1918. p. 1. Retrieved November 6, 2016.
  65. ^ "New Subway Service Between Brooklyn and Manhattan Boroughs" (PDF). The New York Times. April 13, 1919. p. 114. ISSN 0362-4331. Retrieved September 5, 2009.
  66. ^ "New Subway Link Opens; Service Started Through Queens and Montague Street Tubes". The New York Times. August 1, 1920. Retrieved February 13, 2010.
  67. ^ "More Interborough Service for Brooklyn 2 New Lines". Interborough Rapid Transit Company. August 23, 1920. Retrieved September 19, 2016.
  68. ^ "Brooklyn Tube Extensions Open: I.R.T. Begins Service on Eastern Parkway and Nostrand Avenue Lines" (PDF). New York Times. August 23, 1920. Retrieved December 20, 2015.
  69. ^ Buckley, Thomas (January 9, 1965). "East River Tunnel Blocked by IRT Derailment; 100-Man Crew Works Hours to Clear Tracks and Beat Rush-Hour Deadline" (PDF). The New York Times. p. 27. ISSN 0362-4331. Retrieved January 3, 2021.
  70. ^ Derailment of New York City Transit Authority Subway Train in the Joralemon Street Tunnel New York March 17, 1984. United States National Transportation Safety Board. 1985. Retrieved November 5, 2012.
  71. ^ "1,500 Led to Safety as 5 IRT Cars Derail Under the East River". The New York Times. March 18, 1984. ISSN 0362-4331. Retrieved January 3, 2021.
  72. ^ "Federal Register, Volume 71 Issue 16 (Wednesday, January 25, 2006)". govinfo. January 25, 2006. Retrieved January 5, 2021.
  73. ^ Donohue, Pete (November 1, 2012). "Repairing the New York subway system after Hurricane Sandy may be the MTA's biggest task yet". New York Daily News. Retrieved January 5, 2021.
  74. ^ a b Flegenheimer, Matt (November 9, 2012). "New York Subway Repairs Border 'on the Edge of Magic'". The New York Times. ISSN 0362-4331. Retrieved January 5, 2021.
  75. ^ Fermino, Jennifer (October 31, 2012). "Slog to work (if you're lucky)". New York Post. Retrieved November 5, 2012.
  76. ^ Guse, Clayton (October 15, 2020). "MTA to close No. 4 train tunnel between Manhattan and Brooklyn for three weekends, starting now". New York Daily News. Retrieved January 5, 2021.
  77. ^ "It's the 112th anniversary of the Battery Tunnel. (No, not that one.)". Brooklyn Eagle. January 9, 2020. Retrieved January 5, 2021.