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63rd Street Tunnel

Coordinates: 40°45′36″N 73°57′18″W / 40.76000°N 73.95500°W / 40.76000; -73.95500
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For the subway line that uses this tunnel to travel under the East River, see 63rd Street Lines.
63rd Street Tunnel
The 63rd Street Tunnel, in the context of the East Side Access project
Overview
Line63rd Street Line (F and <F> train)
LocationEast River between Manhattan and Queens, New York City
Coordinates40°45′36″N 73°57′18″W / 40.76000°N 73.95500°W / 40.76000; -73.95500
SystemNew York City Subway
LIRR (future)
Operation
OpenedOctober 29, 1989; 35 years ago (1989-10-29)
OperatorMetropolitan Transportation Authority
Technical
Length3,140 feet (960 m) between shafts[1]
No. of tracks2
Width38.5 feet (11.7 m)[1][2]

The 63rd Street Tunnel is a double-deck subway and railroad tunnel under the East River between the boroughs of Manhattan and Queens. It is the newest of the East River tunnels, and the newest rail river crossing in the New York metropolitan area.

The upper level of the 63rd Street Tunnel carries the IND 63rd Street Line of the New York City Subway. Construction of the 63rd Street Tunnel began in 1969, and the tunnel was holed through beneath Roosevelt Island in 1972. However, completion of the tunnel and its connections was delayed by the 1975 New York City fiscal crisis and the upper level was not used in revenue service until 1989. The tunnel was initially referred to as the "tunnel to nowhere" because its Queens end did not connect to any other subway line until 2001.

The tunnel's lower level will carry Long Island Rail Road trains to a new train terminal under Grand Central Terminal, following the expected completion of the East Side Access project in 2022 or 2023.

History

Planning

In February 1963, the New York City Transit Authority (NYCTA) proposed a two-track East River subway tunnel under 76th Street with unspecified connections to the rest of the transit network, at a cost of $139 million. In a May 2, 1963, report, the proposed site of the tunnel was switched to 59th Street. On May 24, Mayor Wagner suggested that a tunnel around 61st Street "be built with all deliberate speed".[3] On October 17, 1963, the Board of Estimate approved a new East River tunnel sited at 64th Street, noting that it would cost $30 million and take seven years to build. The 64th Street site was said to be $5.3 million less expensive, "because of easier grades and smaller curves".[4] The route was changed to 63rd Street because officials of the Rockefeller Institute at 64th Street feared that heavy construction and later train movements so close to the Institute's buildings might have adversely affected delicate instruments at the Institute and change the accuracy of the research being conducted.[5]

A third track was added to the plans for the tunnel in April 1966. The track would serve Long Island Rail Road (LIRR) trains to east Midtown, alleviating train traffic into Pennsylvania Station.[6] A fourth track was added to the plans in August 1966 after it was determined that LIRR trains would be too big to run on subway tracks. This amendment increased the number of LIRR tracks to two, and provided dedicated tracks for the LIRR and the subway.[7] In November 1967, voters approved a $2.5 billion transportation bond issue, and in early 1968, under the Program for Action, officials provided detailed plans for how it would be used. Among many other projects, the proposal included the construction of the 63rd Street Tunnel to host a proposed 63rd Street–Southeast Queens subway line on the upper level (connecting to a "super-express" line and the Archer Avenue lines in Queens), and an LIRR branch traveling to a new railroad terminal in Manhattan on the lower level.[8]

Construction

Construction on the project began on November 24, 1969.[9][10]: 17 (PDF p. 20)  Four 38-foot-square (12 m) prefabricated sections of the 63rd Street Tunnel were constructed under the East River, the first of which was delivered in May 1971.[11] That first section was lowered into place on August 29, 1971,[12] and the last section was lowered on March 14, 1972.[13] The double-deck, 3,140-foot (960 m)[14] tunnel under the East River was "holed through" on October 10, 1972, with the separate sections of tunnels being connected.[15] The estimated cost of the project was $341 million, and the MTA applied for $227 million in Federal funds.[16]

One section of the tunnel was controversial because it called for 1,500 feet (460 m) of cut-and-cover tunneling. which required digging an open trench through Central Park in Manhattan.[17] In June 1970, Mayor John Lindsay told city engineers to write a report that studied ways to reduce the project's impact.[17] The results of the report, released in January 1971, called for using tunnel boring machines underneath Central Park to reduce disruption.[18] The following month, the NYCTA published advertisements in newspapers, seeking construction bids for the tunnels under Central Park, but withdrew them after objections from community and conservation groups.[19] The NYCTA agreed to halve the width of the proposed 75-foot (23 m)-wide cut, which halved the area of affected parkland. The NYCTA also agreed to reduce disruption to the Heckscher Playground, located above the proposed subway tunnel's path, by cutting construction time from three years to two years and by constructing a temporary playground nearby.[20] In March, the NYCTA again sought construction bids.[21] The sections that connected to the existing Broadway and Sixth Avenue Lines were holed through on October 11, 1973.[22] Construction on the section between 5th Avenue and Park Avenue began in August 1974. The project involved digging a 45-foot (14 m)-high cavern underneath the street.[23]

On March 20, 1975, New York mayor Abraham Beame announced significant cutbacks to the plan. Construction of the Southeastern Queens extension was deferred until 1981, and the Long Island Rail Road extension through the lower level of the 63rd Street tunnel was canceled for the foreseeable future.[24] By January 1976, the tunnel was 95% complete.[25] However, later that year, the NYCTA announced that "it will take an extra five or six years—until 1987 or 1988—to complete the new Manhattan–Queens trunk subway line from Central Park to Jamaica via the new 63rd Street tunnel." The main cause of the delay was the 5.8-mile "super express" in Queens.[26] The upper level was completed in 1976, but due to the 1975 New York City fiscal crisis, there was no funding to extend the tunnel in Queens east of the 21st Street–Queensbridge station. In May 1978, the Times noted, "What started out a few years ago as 40 miles of new subway routes to serve the long-suffering residents of Queens has been whittled down to 15 miles, is years behind schedule, and will cost more than twice as much as originally estimated....The line costs $100,000 a foot, will be very short and will serve only a modest number of riders."[27]

The New York Times reported that the lower level of the 63rd Street Tunnel was still under construction by 1976, even though "officials knew that the tunnel would never be used."[28] Richard Ravitch, the MTA chairman, said that to stop the work was impossible or so costly as to make it impractical subsequent to the construction of the subway portion."[28] In reality, the lower level of the 63rd Street Tunnel was completed along with the upper subway level, but could not be used due to its lack of connections on either side.[10]: 17 (PDF p. 20) [28] In 1979, the MTA started studying four options for making the upper level of the tunnel more useful.[29][30][31] The ultimately agreed-on plan was to connect the tunnel to the local tracks of the IND Queens Boulevard Line in Queens, at a cost of $222 million, and a timetable of at least eight years.[32]

By June 1985, the project was again delayed indefinitely after it was found that the tunnel had been flooded with 6 feet (1.8 m) of water, and several girders and electrical equipment had also deteriorated.[33] Two contractors were hired to assess the structural integrity of the tunnel, and the delay was estimated at two years.[34] By 1987, the MTA's contractors had concluded that the tunnel was structurally sound, although federal funding had not yet been released. On February 6, 1987, the MTA approved a new plan to have the tunnel open to 21st Street/Queensbridge by October 1989.[35]

Opening of upper level

The Roosevelt Island station
The Roosevelt Island station

The IND 63rd Street Line went into service on October 29, 1989, twenty years after construction began, with new stations at Lexington Avenue, Roosevelt Island, and 21st Street/41st Avenue in Queens. The line was served by Q trains on weekdays and B trains on weekends. The 1,500-foot (460 m) connector to the Queens Boulevard Line had not yet started construction.[36] It was nicknamed the "tunnel to nowhere" due to its lack of connections in Queens.[37][38]

Planning for the connection to the IND Queens Boulevard Line began in December 1990, with the final design contract awarded in December 1992. Two build alternatives were evaluated: a connection to the local tracks of the Queens Boulevard Line, and a connection to the local and express tracks. The goal of the project was to increase capacity on Queens Boulevard by 33% and to eliminate the dead-end terminal at 21st Street–Queensbridge. Bellmouths were constructed to allow for a future bypass line through Sunnyside Yard.[39] The remaining section from 21st Street to the Queens Boulevard Line, which cost $645 million, began construction on September 22, 1994. The construction project also extended the lower level LIRR tunnel and involved a number of other elements.[39][40][41][42] In December 2000, the 63rd Street Connector was opened for construction reroutes.[43] The connector was open for off-peak reroutes on January 13, 2001,[44] and regular service was expected to begin by August or September of that year.[45] However, the September 11, 2001, terrorist attacks delayed the commencement of regular service. The connector came into regular use on December 16, 2001, with the rerouting of F service at all times to 63rd Street.[46]

Completion of lower level

By the turn of the century, plans had resurfaced to bring LIRR service to East Midtown. In 1995, officials began the planning process for such a link.[47]: 3  By that time, the LIRR was the busiest commuter railroad in the United States, with an average of 269,400 passengers each weekday in 1999.[10]: 4 (PDF p.7)  Penn Station, located on the West Side, was operating at capacity due to a complex track interlocking and limited capacity in the East River Tunnels.[10]: 8 (PDF p.11)  In 1999, the MTA proposed a $17 billion five-year capital budget, which included a $1.6 billion LIRR connection to a new station under Grand Central Terminal, to be built as part of a project called East Side Access.[48] The project's final environmental impact assessment (FEIS) was released in March 2001.[49]: 1 [a] In May 2001, the Federal Transit Administration (FTA) gave a favorable "Record of Decision", a mark of approval, to East Side Access after reviewing the project's FEIS.[47]: 3 [49] The September 11 attacks underscored the need to bring LIRR service to Grand Central.[50] In 2002, Congress passed a bill that allocated $132 million for infrastructure projects in New York State, of which $14.7 million was to go toward funding East Side Access.[51] Approval of a final design for East Side Access was granted in 2002, and the first properties for East Side Access were acquired in 2003.[47]: 4 

A tunnel cavern located north of the new Grand Central LIRR station, with two tubes diverging from the cavern. A railroad switch will be installed within the cavern, connecting the tracks that run through the tubes.
A tunnel cavern deep under Park Avenue, which will house a switch to the north of the new LIRR station

The construction contract for a 1-mile (1.6 km) tunnel in Manhattan westward and southward from the dormant lower level of the 63rd Street Tunnel to the new 100-foot-deep (30 m) station beneath Grand Central Terminal was awarded in July 2006. The contract went to Dragados/Judlau, a joint American–Spanish venture whose American headquarters were in College Point, Queens, close to the East Side Access site.[52][53]: 10  The first tunnel boring machine was launched westbound then southbound from the 63rd Street Tunnel in September 2007, and it reached Grand Central Terminal in July 2008.[54] The second machine began boring a parallel tunnel in December 2007 and had completed its tunnel at 37th Street on September 30, 2008.[55][56]

On the Queens side, work included extending the tunnel under Northern Boulevard and boring four tunnels under Sunnyside Yard. This was a particularly delicate and expensive task due to the existence of the elevated BMT Astoria Line and the underground IND Queens Boulevard Line directly above.[57][58] A temporary narrow-gauge railway and a conveyor belt system were constructed behind the tunnel boring machines and through the 63rd Street Tunnels to the Queens bell mouth.[38][59] Pile Foundation Construction Company built an $83 million cut structure, which extends the tracks under Northern Boulevard into the Sunnyside Yard, and then covered the cut with a deck.[60] In September 2009, the MTA awarded Granite-Traylor-Frontiere Joint Venture a $659.2 million contract to employ two 500-ton slurry tunnel boring machines to create the tunnels connecting the LIRR Main Line and the Port Washington Branch to the 63rd Street Tunnel under 41st Avenue.[53]: 23 [61] The four tunnels, with precast concrete liners, total 2 miles (3.2 km) in length.[62] The two tunnel boring machines began digging on the Queens side in April 2011.[63] On December 22, 2011, breakthrough was achieved in Tunnel "A" of the four Queens tunnel drives from the 63rd Street Tunnel bellmouth.[58] By July 25, 2012, all four Queens tunnel drives were complete.[64]

Lower level tracks

On January 27, 2016, the final major contract for the construction of East Side Access was awarded to Tutor Perini Corporation. The contract was for the construction of four railroad platforms and eight tracks for the new Grand Central Terminal.[65] The first tracks on the lower level were laid in September 2017.[66] The completion of the project has been pushed back repeatedly from an initial opening date of 2009.[67] As of August 2017, the opening date of East Side Access was tentatively projected to be December 2023[68] or late 2023.[69] However, by April 2018, the MTA was looking to start passenger service in December 2022, at an estimated cost of $11.1 billion.[70][71][72]: 36 

Construction methods

Unlike other underwater rail tunnels in New York City, which were bored under the riverbed, the 63rd Street Tunnel's river portions were built using the immersed tube method.[73] Trenches were dug in the river bed, and four 375-foot (114 m) long prefabricated concrete sections of tunnel fabricated in Port Deposit, Maryland were floated into position and then sunk into the trenches.[2][74][75] Two tubes were placed on each side of Roosevelt Island.[76] The tubes were 38-foot-square (12 m) prefabricated sections and contained four openings, two for the pair of tracks on each level.[11] The tubes extended 3,140 feet (960 m) under the water, from 63rd Street and FDR Drive on the Manhattan waterfront to 41st Avenue and Vernon Boulevard on the Queens waterfront.[1] The construction shafts at Queensbridge Park in Queens, as well as on Roosevelt Island, were turned into ventilation shafts after the conclusion of construction.[77]: 74 

Other portions of the tunnel were built using cut-and-cover construction or rock tunneling.[77]: 45  Waste material from the 63rd Street Tunnel's construction was deposited at the tip of Roosevelt Island, as well as off the coast of Astoria, Queens. Over 500,000 cubic yards (380,000 m3) of dirt had to be extracted.[77]: 74 

Usage

The tunnel has two levels. The F and <F> train uses the two tracks on the upper level, connecting the IND Queens Boulevard Line in Queens to the IND Sixth Avenue Line in Manhattan via the IND 63rd Street Line. There are also track connections to and from the BMT 63rd Street Line, west of the Lexington Avenue–63rd Street station.[78] The tunnel was placed into partial service in 1989 and was nicknamed the "tunnel to nowhere" due to its lack of connections in Queens.[37][38] The final section of the 63rd Street Tunnel, which cost $645 million to complete and connects what had been a service dead-ending at the 21st Street station in Queensbridge to the IND Queens Boulevard Line, was finished in 2000. It was first used by trains during off-peak hours while signal work was performed in the 53rd Street Tunnel.[79][80] The tunnel connection was placed into permanent service with the start of V service and the rerouting of the F service on December 17, 2001.[81]

The two trackways on the lower level went unused when the tunnel construction project was halted in the 1970s.[37] They are planned to be used by the Long Island Rail Road's East Side Access project, which will bring LIRR commuter trains to Grand Central Terminal. During construction of the East Side Access project, the lower level of the 63rd Street Tunnel was used to transport equipment; excavated rock from Manhattan was also hauled out to Sunnyside Yard on a 5-mile (8.0 km) long conveyor belt.[38] The laying of permanent tracks started in September 2017.[66] Due to low vertical clearances in the lower level, bilevel rail cars, such as the LIRR's C3 fleet, would not be able to serve Grand Central when the tunnel is complete.[82]: 10–11 

During the tunnel's construction, an alignment underneath Central and Queensbridge Parks was decided as the only feasible route for the tunnel.[77]: 43  Because the 63rd Street Tunnel is at such a deep level, there are several ventilation shafts along its route. In Central Park, near the Central Park Zoo, there are several ventilation grates that are at the same level as the ground, covering about 1,400 square feet (130 m2) of surface area.[77]: 58–59  A ventilation building was deemed to be architecturally unacceptable, hence the inclusion of several grates.[77]: 63–64  On the other hand, gratings at Queensbridge Park were declared to be unfeasible due to the park's small usable area. Therefore, a ventilation building stands in Queensbridge Park, measuring 60 by 90 feet (18 by 27 m).[77]: 68–71  Additional ventilation shafts are located at Second Avenue and 63rd Street in Manhattan,[77]: 30  and on the western shore of Roosevelt Island.[77]: 72  When the 63rd Street Connector was constructed in the 1990s, additional ventilation structures were built at 29th and 39th Streets in Queens.[39]

  • Vents
  • Tunnel vents in Central Park
    Tunnel vents in Central Park
  • 63rd Street ventilator, east of Second Avenue
    63rd Street ventilator, east of Second Avenue
  • Ventilation structure on Roosevelt Island
    Ventilation structure on Roosevelt Island
  • Ventilator and emergency exit in Queensbridge Park
    Ventilator and emergency exit in Queensbridge Park

Awards

The 63rd Street Tunnel and the 63rd Street Tunnel Connector received the Construction Achievement Project of the Year Award from the Metropolitan Section of the American Society of Civil Engineers in 1973 and 2000, respectively.[83] The 63rd Street Tunnel Connector was also selected as the Transit Project of the Year in 1999 by New York Construction News.[84]

Notes

  1. ^ For the full FEIS, see:
    • "East Side Access Final Environmental Impact Statement: Overview". mta.info. Metropolitan Transportation Authority. March 6, 2001. Retrieved February 2, 2018..

References

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  83. ^ "Construction Achievement Project of the Year Award". ASCE Metropolitan Section. Archived from the original on July 12, 2019. Retrieved July 12, 2019. {{cite web}}: |archive-date= / |archive-url= timestamp mismatch; July 13, 2019 suggested (help); Unknown parameter |dead-url= ignored (|url-status= suggested) (help)
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