120-740: The East River Tunnels are four single-track railroad passenger service tunnels that extend from the eastern end of Pennsylvania Station under 32nd and 33rd Streets in Manhattan and cross the East River to Long Island City in Queens . The tracks carry Long Island Rail Road (LIRR) and Amtrak trains travelling to and from Penn Station and points to the north and east. The tracks also carry New Jersey Transit trains deadheading to Sunnyside Yard . They are part of Amtrak's Northeast Corridor , used by trains traveling between New York City and New England via
240-660: A rapid transit network are usually in the tunnel. Some tunnels are used as sewers or aqueducts to supply water for consumption or for hydroelectric stations. Utility tunnels are used for routing steam, chilled water, electrical power or telecommunication cables, as well as connecting buildings for convenient passage of people and equipment. Secret tunnels are built for military purposes, or by civilians for smuggling of weapons , contraband , or people . Special tunnels, such as wildlife crossings , are built to allow wildlife to cross human-made barriers safely. Tunnels can be connected together in tunnel networks . A tunnel
360-550: A "quasi-public corporation" to take over the operation of intercity passenger trains. Matters were brought to a head on June 21, 1970, when the Penn Central , the largest railroad in the Northeastern United States and teetering on bankruptcy, filed to discontinue 34 of its passenger trains. In October 1970, Congress passed, and President Richard Nixon signed into law (against the objections of most of his advisors),
480-683: A "transitional CEO" who would reorganize Amtrak before turning it over to new leadership. On November 17, 2016, the Gateway Program Development Corporation (GDC) was formed for the purpose of overseeing and effectuating the rail infrastructure improvements known as the Gateway Program. GDC is a partnership of the States of New York and New Jersey and Amtrak. The Gateway Program includes the Hudson Tunnel Project, to build
600-521: A day's pay for 100-to-150-mile (160 to 240 km) workdays. Streamliners covered that in two hours. Matters approached a crisis in the 1960s. Passenger service route-miles fell from 107,000 miles (172,000 km) in 1958 to 49,000 miles (79,000 km) in 1970, the last full year of private operation. The diversion of most United States Post Office Department mail from passenger trains to trucks, airplanes, and freight trains in late 1967 deprived those trains of badly needed revenue. In direct response,
720-449: A large factor in the decision making process. Civil engineers usually use project management techniques for developing a major structure. Understanding the amount of time the project requires, and the amount of labor and materials needed is a crucial part of project planning. The project duration must be identified using a work breakdown structure and critical path method . Also, the land needed for excavation and construction staging, and
840-564: A large overhang of debt from years of underfunding. In the mid-1990s, Amtrak suffered through a serious cash crunch. Under Downs, Congress included a provision in the Taxpayer Relief Act of 1997 that resulted in Amtrak receiving a $ 2.3 billion tax refund that resolved their cash crisis. However, Congress also instituted a "glide path" to financial self-sufficiency, excluding railroad retirement tax act payments. George Warrington became
960-613: A new tunnel under the Hudson River and rehabilitate the existing century-old tunnel, and the Portal North Bridge, to replace a century-old moveable bridge with a modern structure that is less prone to failure. Later projects of the Gateway Program, including the expansion of track and platforms at Penn Station New York, construction of the Bergen Loop and other improvements will roughly double capacity for Amtrak and NJ Transit trains in
1080-461: A pipe jack, with the span of some box jacks in excess of 20 metres (66 ft). A cutting head is normally used at the front of the box being jacked, and spoil removal is normally by excavator from within the box. Recent developments of the Jacked Arch and Jacked deck have enabled longer and larger structures to be installed to close accuracy. There are also several approaches to underwater tunnels,
1200-679: A second direct route into Manhattan via the 63rd Street Tunnel ), Amtrak later pushed back the start date of the East River Tunnels' reconstruction to 2025, and increased the construction time to four years. In April 2023, Amtrak launched a request for qualifications for contractors to repair the tunnels. Amtrak hired Skanska E-J ERT Joint Venture in July 2024 to repair the tunnels for about $ 1.6 billion. The East River Tunnels are owned by Amtrak and are electrified by both third rail and overhead catenary . Diesel-powered locomotives are not allowed in
1320-421: A specialized method called clay-kicking for digging tunnels in clay-based soils. The clay-kicker lies on a plank at a 45-degree angle away from the working face and rather than a mattock with his hands, inserts with his feet a tool with a cup-like rounded end, then turns the tool with his hands to extract a section of soil, which is then placed on the waste extract. Clay-kicking is a specialized method developed in
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#17328454388761440-434: A tube can be sunk into a body of water, which is called an immersed tunnel. Cut-and-cover is a simple method of construction for shallow tunnels where a trench is excavated and roofed over with an overhead support system strong enough to carry the load of what is to be built above the tunnel. There are two basic forms of cut-and-cover tunnelling: Shallow tunnels are often of the cut-and-cover type (if under water, of
1560-710: A tunnel than a sufficiently strong bridge). Some water crossings are a mixture of bridges and tunnels, such as the Denmark to Sweden link and the Chesapeake Bay Bridge-Tunnel in Virginia . There are particular hazards with tunnels, especially from vehicle fires when combustion gases can asphyxiate users, as happened at the Gotthard Road Tunnel in Switzerland in 2001. One of the worst railway disasters ever,
1680-432: A tunnel. Bridges usually require a larger footprint on each shore than tunnels. In areas with expensive real estate, such as Manhattan and urban Hong Kong , this is a strong factor in favor of a tunnel. Boston's Big Dig project replaced elevated roadways with a tunnel system to increase traffic capacity, hide traffic, reclaim land, redecorate, and reunite the city with the waterfront. The 1934 Queensway Tunnel under
1800-561: A year, its highest number since its founding in 1970. Politico noted a key problem: "the rail system chronically operates in the red. A pattern has emerged: Congress overrides cutbacks demanded by the White House and appropriates enough funds to keep Amtrak from plunging into insolvency. But, Amtrak advocates say, that is not enough to fix the system's woes." Joseph H. Boardman replaced Kummant as president and CEO in late 2008. In 2011, Amtrak announced its intention to improve and expand
1920-440: Is allowed in this tunnel tube, and motorcyclists are directed to the other tube. Each level was built with a three-lane roadway, but only two lanes per level are used – the third serves as a hard shoulder within the tunnel. The A86 Duplex is Europe's longest double-deck tunnel. Amtrak The National Railroad Passenger Corporation , doing business as Amtrak ( / ˈ æ m t r æ k / ; reporting marks AMTK , AMTZ ),
2040-500: Is intended to carry both the Istanbul metro and a two-level highway, over a length of 6.5 km (4.0 miles). The French A86 Duplex Tunnel [ fr ] in west Paris consists of two bored tunnel tubes, the eastern one of which has two levels for light motorized vehicles, over a length of 10 km (6.2 miles). Although each level offers a physical height of 2.54 m (8.3 ft), only traffic up to 2 m (6.6 ft) tall
2160-637: Is managed as a for-profit organization . The company's headquarters is located one block west of Union Station in Washington, D.C. Amtrak is headed by a Board of Directors, two of whom are the Secretary of Transportation and CEO of Amtrak, while the other eight members are nominated to serve a term of five years. Amtrak's network includes over 500 stations along 21,400 miles (34,000 km) of track. It directly owns approximately 623 miles (1,003 km) of this track and operates an additional 132 miles of track;
2280-596: Is owned by New York's Metropolitan Transportation Authority and the Connecticut Department of Transportation as the New Haven Line .) This mainline became Amtrak's "jewel" asset, and helped the railroad generate revenue. While the NEC ridership and revenues were higher than any other segment of the system, the cost of operating and maintaining the corridor proved to be overwhelming. As a result, Amtrak's federal subsidy
2400-575: Is powered by overhead lines ; for the rest of the system, diesel-fueled locomotives are used. Routes vary widely in the frequency of service, from three-days-a-week trains on the Sunset Limited to several times per hour on the Northeast Corridor. For areas not served by trains, Amtrak Thruway routes provide guaranteed connections to trains via buses, vans, ferries and other modes. The most popular and heavily used services are those running on
2520-487: Is relatively long and narrow; the length is often much greater than twice the diameter , although similar shorter excavations can be constructed, such as cross passages between tunnels. The definition of what constitutes a tunnel can vary widely from source to source. For example, in the United Kingdom, a road tunnel is defined as "a subsurface highway structure enclosed for a length of 150 metres (490 ft) or more." In
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#17328454388762640-401: Is sometimes necessary during the excavation of a tunnel. They are usually circular and go straight down until they reach the level at which the tunnel is going to be built. A shaft normally has concrete walls and is usually built to be permanent. Once the access shafts are complete, TBMs are lowered to the bottom and excavation can start. Shafts are the main entrance in and out of the tunnel until
2760-515: Is that the open building pit is muted after tunnel construction; no roof is placed. Some tunnels are double-deck, for example, the two major segments of the San Francisco–Oakland Bay Bridge (completed in 1936) are linked by a 160-metre (540 ft) double-deck tunnel section through Yerba Buena Island , the largest-diameter bored tunnel in the world. At construction this was a combination bidirectional rail and truck pathway on
2880-673: Is the Siloam Tunnel , built in Jerusalem by the kings of Judah around the 8th century BC. Another tunnel excavated from both ends, maybe the second known, is the Tunnel of Eupalinos , which is a tunnel aqueduct 1,036 m (3,400 ft) long running through Mount Kastro in Samos , Greece. It was built in the 6th century BC to serve as an aqueduct . In Ethiopia , the Siqurto foot tunnel , hand-hewn in
3000-456: Is the national passenger railroad company of the United States. It operates inter-city rail service in 46 of the 48 contiguous U.S. states and three Canadian provinces . Amtrak is a portmanteau of the words America and track. Founded in 1971 as a quasi-public corporation to operate many U.S. passenger rail routes, Amtrak receives a combination of state and federal subsidies but
3120-734: The California Zephyr between Oakland and Chicago via Denver and revived the Auto Train , a unique service that carries both passengers and their vehicles. Amtrak advertised it as a great way to avoid traffic along the I-95 running between Lorton, Virginia (near Washington, D.C.) and Sanford, Florida (near Orlando) on the Silver Star alignment. In 1980s and 1990s, stations in Baltimore, Chicago, and Washington, D.C. received major rehabilitation and
3240-442: The 10 largest metropolitan areas and 83% of passengers travel on routes shorter than 400 miles (645 km). In 1916, 98% of all commercial intercity travelers in the United States moved by rail, and the remaining 2% moved by inland waterways . Nearly 42 million passengers used railways as primary transportation. Passenger trains were owned and operated by the same privately owned companies that operated freight trains. As
3360-472: The Atchison, Topeka and Santa Fe Railway filed to discontinue 33 of its remaining 39 trains, ending almost all passenger service on one of the largest railroads in the country. The equipment the railroads had ordered after World War II was now 20 years old, worn out, and in need of replacement. As passenger service declined, various proposals were brought forward to rescue it. The 1961 Doyle Report proposed that
3480-556: The Balvano train disaster , was caused by a train stalling in the Armi tunnel in Italy in 1944, killing 426 passengers. Designers try to reduce these risks by installing emergency ventilation systems or isolated emergency escape tunnels parallel to the main passage. Government funds are often required for the creation of tunnels. When a tunnel is being planned or constructed, economics and politics play
3600-1004: The COVID-19 pandemic , Amtrak continued operating as an essential service. It started requiring face coverings the week of May 17, and limited sales to 50% of capacity. Most long-distance routes were reduced to three weekly round trips in October 2020. In March 2021, following President Joe Biden's American Jobs Plan announcement, Amtrak CEO Bill Flynn outlined a proposal called Amtrak Connects US that would expand state-supported intercity corridors with an infusion of upfront capital assistance. This would expand service to cities including Las Vegas , Phoenix , Baton Rouge , Nashville , Chattanooga , Louisville , Columbus (Ohio) , Wilmington (North Carolina) , Cheyenne , Montgomery , Concord , and Scranton . Also in March 2021, Amtrak announced plans to return 12 of its long-distance routes to daily schedules later in
3720-834: The Hell Gate Bridge . The tunnels were built in the first decade of the 20th century as part of the New York Tunnel Extension . The original plan for the extension which was published in June 1901, called for the construction of a bridge across the Hudson River between 45th and 50th Streets in Manhattan, as well as two closely spaced terminals for the LIRR and Pennsylvania Railroad (PRR). This would allow passengers to travel between Long Island and New Jersey without having to change trains; at
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3840-640: The Highway Trust Fund and Aviation Trust Fund paid for by user fees, highway fuel and road taxes, and, in the case of the General Fund, from general taxation. Gunn dropped most freight express business and worked to eliminate deferred maintenance. A plan by the Bush administration "to privatize parts of the national passenger rail system and spin off other parts to partial state ownership" provoked disagreement within Amtrak's board of directors. Late in 2005, Gunn
3960-657: The Jamestown Exposition in Norfolk, Virginia , to celebrate the 300th anniversary of the nearby founding of the colony at Jamestown . The same tube, with an inscription indicating that it had been displayed at the Exposition, was later installed under water and remains in use. Construction was completed on the East River tunnels on March 18, 1908. The tubes opened along with Pennsylvania Station on September 8, 1910. As part of
4080-551: The New York Connecting Railroad improvement project, a connection from the East River Tunnels to the New Haven Railroad tracks was also built. New Haven trains began running through the East River Tunnels, serving Penn Station, in 1917 after the Hell Gate Bridge opened. The East River Tunnels were flooded with 14 million US gallons (53,000,000 L) of water during Hurricane Sandy in 2012. Even after
4200-464: The Port Authority of New York and New Jersey was not aware of this bill and had not asked for a grant for such a project. Increased taxes to finance a large project may cause opposition. Tunnels are dug in types of materials varying from soft clay to hard rock. The method of tunnel construction depends on such factors as the ground conditions, the groundwater conditions, the length and diameter of
4320-797: The Queens-Midtown Tunnel between Manhattan and the borough of Queens on Long Island ; the Detroit-Windsor Tunnel between Michigan and Ontario ; and the Elizabeth River tunnels between Norfolk and Portsmouth, Virginia ; the 1934 River Mersey road Queensway Tunnel ; the Western Scheldt Tunnel , Zeeland, Netherlands; and the North Shore Connector tunnel in Pittsburgh, Pennsylvania . The Sydney Harbour Tunnel
4440-613: The Railroad Revitalization and Regulatory Reform Act of 1976. A large part of the legislation was directed to the creation of Conrail , but the law also enabled the transfer of the portions of the NEC not already owned by state authorities to Amtrak. Amtrak acquired the majority of the NEC on April 1, 1976. (The portion in Massachusetts is owned by the Commonwealth and managed by Amtrak. The route from New Haven to New Rochelle
4560-466: The River Mersey at Liverpool was chosen over a massively high bridge partly for defense reasons; it was feared that aircraft could destroy a bridge in times of war, not merely impairing road traffic but blocking the river to navigation. Maintenance costs of a massive bridge to allow the world's largest ships to navigate under were considered higher than for a tunnel. Similar conclusions were reached for
4680-665: The United Kingdom of digging tunnels in strong clay-based soil structures. This method of cut and cover construction required relatively little disturbance of property during the renewal of the United Kingdom's then ancient sewerage systems. It was also used during the First World War by Royal Engineer tunnelling companies placing mines beneath German lines, because it was almost silent and so not susceptible to listening methods of detection. Tunnel boring machines (TBMs) and associated back-up systems are used to highly automate
4800-591: The canton of Glarus . The borehole has a diameter of 8.03 metres (26.3 ft). The four TBMs used for excavating the 57-kilometre (35 mi) Gotthard Base Tunnel , in Switzerland , had a diameter of about 9 metres (30 ft). A larger TBM was built to bore the Green Heart Tunnel (Dutch: Tunnel Groene Hart) as part of the HSL-Zuid in the Netherlands, with a diameter of 14.87 metres (48.8 ft). This in turn
4920-486: The water table . This pressurizes the ground ahead of the TBM cutter head to balance the water pressure. The operators work in normal air pressure behind the pressurized compartment, but may occasionally have to enter that compartment to renew or repair the cutters. This requires special precautions, such as local ground treatment or halting the TBM at a position free from water. Despite these difficulties, TBMs are now preferred over
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5040-689: The 16th century as a metaphor for a narrow, confined space like the inside of a cask. Some of the earliest tunnels used by humans were paleoburrows excavated by prehistoric mammals. Much of the early technology of tunneling evolved from mining and military engineering . The etymology of the terms "mining" (for mineral extraction or for siege attacks ), " military engineering ", and " civil engineering " reveals these deep historic connections. Predecessors of modern tunnels were adits that transported water for irrigation , drinking, or sewerage . The first qanats are known from before 2000 BC. The earliest tunnel known to have been excavated from both ends
5160-638: The 1960s. The main idea of this method is to use the geological stress of the surrounding rock mass to stabilize the tunnel, by allowing a measured relaxation and stress reassignment into the surrounding rock to prevent full loads becoming imposed on the supports. Based on geotechnical measurements, an optimal cross section is computed. The excavation is protected by a layer of sprayed concrete, commonly referred to as shotcrete . Other support measures can include steel arches, rock bolts, and mesh. Technological developments in sprayed concrete technology have resulted in steel and polypropylene fibers being added to
5280-687: The 1971 Kingsway Tunnel under the Mersey. In Hampton Roads, Virginia , tunnels were chosen over bridges for strategic considerations; in the event of damage, bridges might prevent US Navy vessels from leaving Naval Station Norfolk . Water-crossing tunnels built instead of bridges include the Seikan Tunnel in Japan; the Holland Tunnel and Lincoln Tunnel between New Jersey and Manhattan in New York City ;
5400-552: The 20th century progressed, patronage declined in the face of competition from buses , air travel , and the car . New streamlined diesel-powered trains such as the Pioneer Zephyr were popular with the traveling public but could not reverse the trend. By 1940, railroads held 67 percent of commercial passenger-miles in the United States. In real terms, passenger-miles had fallen by 40% since 1916, from 42 billion to 25 billion. Traffic surged during World War II , which
5520-599: The California corridor trains accounted for a combined 2.35 million passengers in fiscal year 2021. Other popular routes include the Empire Service between New York City and Niagara Falls , via Albany and Buffalo , which carried 613.2 thousand passengers in fiscal year 2021, and the Keystone Service between New York City and Harrisburg via Philadelphia that carried 394.3 thousand passengers that same year. Four of
5640-448: The DOT's analysis was far too optimistic, with director George Shultz arguing to cut the number of routes by around half. Nixon agreed with Shultz, and the public draft presented by Volpe on November 30 consisted of only 16 routes. The initial reaction to this heavily-cut-back proposed system from the public, the press, and congressmen was strongly negative. It made front-page headlines across
5760-459: The Empire Connection tunnel opened in 1991, allowing Amtrak to consolidate all New York services at Penn Station. Despite the improvements, Amtrak's ridership stagnated at roughly 20 million passengers per year, amid uncertain government aid from 1981 to about 2000. In the early 1990s, Amtrak tested several different high-speed trains from Europe on the Northeast Corridor. An X 2000 train
5880-691: The Middle Ages, crosses a mountain ridge. In the Gaza Strip , the network of tunnels was used by Jewish strategists as rock-cut shelters, in first links to Judean resistance against Roman rule in the Bar Kokhba revolt during the 2nd century AD. A major tunnel project must start with a comprehensive investigation of ground conditions by collecting samples from boreholes and by other geophysical techniques. An informed choice can then be made of machinery and methods for excavation and ground support, which will reduce
6000-478: The NEC and rises in automobile fuel costs. The inauguration of the high-speed Acela in late 2000 generated considerable publicity and led to major ridership gains. However, through the late 1990s and very early 21st century, Amtrak could not add sufficient express freight revenue or cut sufficient other expenditures to break even. By 2002, it was clear that Amtrak could not achieve self-sufficiency, but Congress continued to authorize funding and released Amtrak from
6120-630: The NEC, including the Acela and Northeast Regional . The NEC runs between Boston and Washington, D.C. via New York City and Philadelphia. Some services continue into Virginia . The NEC services accounted for 4.4 million of Amtrak's 12.2 million passengers in fiscal year 2021. Outside the NEC the most popular services are the short-haul corridors in California, the Pacific Surfliner , Capitol Corridor , and San Joaquins , which are supplemented by an extensive network of connecting buses. Together
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#17328454388766240-982: The NRPC as a politically expedient way for the President and Congress to give passenger trains a "last hurrah" as demanded by the public. They expected the NRPC to quietly disappear as public interest waned. After Fortune magazine exposed the manufactured mismanagement in 1974, Louis W. Menk , chairman of the Burlington Northern Railroad , remarked that the story was undermining the scheme to dismantle Amtrak. Proponents also hoped that government intervention would be brief and that Amtrak would soon be able to support itself. Neither view had proved to be correct; popular support allowed Amtrak to continue in operation longer than critics imagined, while financial results made passenger train service returning to private railroad operations infeasible. The Rail Passenger Service Act gave
6360-421: The NRPC had hired Lippincott & Margulies to create a brand for it and replace its original working brand name of Railpax. On March 30, L&M's work was presented to the NRPC's board of incorporators, who unanimously agreed on the "headless arrow" logo and on the new brand name "Amtrak", a portmanteau of the words America and trak , the latter itself a sensational spelling of track . The name change
6480-414: The Navy and retired Southern Railway head William Graham Claytor Jr. came out of retirement to lead Amtrak. During his time at Southern, Claytor was a vocal critic of Amtrak's prior managers, who all came from non-railroading backgrounds. Transportation Secretary Drew Lewis cited this criticism as a reason why the Democrat Claytor was acceptable to the Reagan White House. Despite frequent clashes with
6600-457: The New York City Board of Rapid Transit Commissioners, who objected that they would not have jurisdiction over the new tunnels, as well as from the Interborough Rapid Transit Company , which saw the New York Tunnel Extension as a potential competitor to its as-yet-incomplete rapid transit service. The project was approved by the New York City Board of Aldermen in December 1902, on a 41–36 vote. The North and East River tunnels were to be built under
6720-447: The Northeast Corridor, some of which connect to it or are extensions from it. In addition to its inter-city services, Amtrak also operates commuter services under contract for three public agencies: the MARC Penn Line in Maryland, Shore Line East in Connecticut, and Metrolink in Southern California. Service on the Northeast Corridor (NEC), between Boston , and Washington, D.C. , as well as between Philadelphia and Harrisburg ,
6840-498: The Northeast Corridor, state-supported short-haul service outside the Northeast Corridor, and medium- and long-haul service known within Amtrak as the National Network. Amtrak receives federal funding for the vast majority of its operations including the central spine of the Northeast Corridor as well as for its National Network routes. In addition to the federally funded routes, Amtrak partners with transportation agencies in 18 states to operate other short and medium-haul routes outside of
6960-406: The November 30th draft. These required routes only had their endpoints specified; the selection of the actual routes to be taken between the endpoints was left to the NRPC, which had just three months to decide them before it was due to start service. Consultants from McKinsey & Company were hired to perform this task, and their results were publicly announced on March 22. At the same time,
7080-446: The Queens shoreline. The four lines under the East River are numbered south to north, lines 1 and 2 running beneath 32nd Street and Lines 3 and 4 under 33rd Street. Eastward trains usually use lines 1 and 3, and westbound usually use lines 2 and 4. To bring the same-direction tunnels into adjacency, line 2 crosses beneath line 3 underground a few hundred feet west of the east end of the line 2 tunnel. Approaching Harold Interlocking from
7200-474: The Rail Passenger Service Act. Proponents of the bill, led by the National Association of Railroad Passengers (NARP), sought government funding to ensure the continuation of passenger trains. They conceived the National Railroad Passenger Corporation (NRPC), a quasi-public corporation that would be managed as a for-profit organization , but which would receive taxpayer funding and assume operation of intercity passenger trains – while many involved in drafting
7320-473: The Reagan administration over funding, Claytor enjoyed a good relationship with Lewis, John H. Riley , the head of the Federal Railroad Administration (FRA), and with members of Congress. Limited funding led Claytor to use short-term debt to fund operations. Building on mechanical developments in the 1970s, high-speed Washington–New York Metroliner Service was improved with new equipment and faster schedules. Travel time between New York and Washington, D.C.
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#17328454388767440-401: The Secretary of Transportation, at that time John A. Volpe , thirty days to produce an initial draft of the endpoints of the routes the NRPC would be required by law to serve for four years. On November 24 Volpe presented his initial draft consisting of 27 routes to Nixon, which he believed would make a $ 24 million profit by 1975. The Office of Management and Budget , however, believed Volpe and
7560-423: The United States, the NFPA definition of a tunnel is "An underground structure with a design length greater than 23 m (75 ft) and a diameter greater than 1,800 millimetres (5.9 ft)." The word "tunnel" comes from the Middle English tonnelle , meaning "a net", derived from Old French tonnel , a diminutive of tonne ("cask"). The modern meaning, referring to an underground passageway, evolved in
7680-455: The bill did not believe the NRPC would actually be profitable, this was necessary in order for the White House and more conservative members of Congress to support the bill. There were several key provisions: Of the 26 railroads still offering intercity passenger service in 1970, only six declined to join the NRPC. Nearly everyone involved expected the experiment to be short-lived. The Nixon administration and many Washington insiders viewed
7800-400: The blocky nature of rocks, the exact location of fault zones, or the stand-up times of softer ground. This may be a particular concern in large-diameter tunnels. To give more information, a pilot tunnel (or "drift tunnel") may be driven ahead of the main excavation. This smaller tunnel is less likely to collapse catastrophically should unexpected conditions be met, and it can be incorporated into
7920-433: The busiest, most complex section of the Northeast Corridor. In June 2017, it was announced that former Delta and Northwest Airlines CEO Richard Anderson would become Amtrak's next President & CEO. Anderson began the job on July 12, assuming the title of President immediately and serving alongside Moorman as "co-CEOs" until the end of the year. On April 15, 2020, Atlas Air Chairman, President and CEO William Flynn
8040-451: The concrete mix to improve lining strength. This creates a natural load-bearing ring, which minimizes the rock's deformation . By special monitoring the NATM method is flexible, even at surprising changes of the geomechanical rock consistency during the tunneling work. The measured rock properties lead to appropriate tools for tunnel strengthening . In pipe jacking , hydraulic jacks are used to push specially made pipes through
8160-434: The corridor to make it suitable for higher-speed electric trains. The Northend Electrification Project extended existing electrification from New Haven, Connecticut , to Boston to complete the overhead power supply along the 454-mile (731 km) route, and several grade crossings were improved or removed. Ridership increased during the first decade of the 21st century after the implementation of capital improvements in
8280-477: The country and it was quickly leaked that the DOT had wanted a far larger system than the White House would approve of. The ICC produced its own report on December 29, criticising the proposed draft and arguing for the inclusion of fifteen additional routes, giving further ammunition to the congressmen who wanted an expanded system. Further wrangling between the DOT and the White House produced the final list of routes on January 28, 1971, adding five additional routes to
8400-409: The entire tunnelling process, reducing tunnelling costs. In certain predominantly urban applications, tunnel boring is viewed as a quick and cost-effective alternative to laying surface rails and roads. Expensive compulsory purchase of buildings and land, with potentially lengthy planning inquiries, is eliminated. Disadvantages of TBMs arise from their usually large size – the difficulty of transporting
8520-480: The ex- New York Central Railroad 's Water Level Route from New York to Ohio and Grand Trunk Western Railroad 's Chicago to Detroit route. The reduced passenger train schedules created confusion amongst staff. At some stations, Amtrak service was available only late at night or early in the morning, prompting complaints from passengers. Disputes with freight railroads over track usage caused some services to be rerouted, temporarily cancelled, or replaced with buses. On
8640-441: The final tunnel or used as a backup or emergency escape passage. Alternatively, horizontal boreholes may sometimes be drilled ahead of the advancing tunnel face. Other key geotechnical factors: For water crossings, a tunnel is generally more costly to construct than a bridge. However, both navigational and traffic considerations may limit the use of high bridges or drawbridges intersecting with shipping channels, necessitating
8760-405: The ground behind a TBM or shield. This method is commonly used to create tunnels under existing structures, such as roads or railways. Tunnels constructed by pipe jacking are normally small diameter bores with a maximum size of around 3.2 metres (10 ft). Box jacking is similar to pipe jacking, but instead of jacking tubes, a box-shaped tunnel is used. Jacked boxes can be a much larger span than
8880-611: The high-speed rail corridor from Penn Station in NYC, under the Hudson River in new tunnels, and double-tracking the line to Newark, NJ , called the Gateway Program , initially estimated to cost $ 13.5 billion (equal to $ 18 billion in 2023). From May 2011 to May 2012, Amtrak celebrated its 40th anniversary with festivities across the country that started on National Train Day (May 7, 2011). A commemorative book entitled Amtrak: An American Story
9000-636: The immersed-tube type), while deep tunnels are excavated, often using a tunnelling shield . For intermediate levels, both methods are possible. Large cut-and-cover boxes are often used for underground metro stations, such as Canary Wharf tube station in London. This construction form generally has two levels, which allows economical arrangements for ticket hall, station platforms, passenger access and emergency egress, ventilation and smoke control, staff rooms, and equipment rooms. The interior of Canary Wharf station has been likened to an underground cathedral, owing to
9120-435: The inevitable smoke and steam. A major disadvantage of cut-and-cover is the widespread disruption generated at the surface level during construction. This, and the availability of electric traction, brought about London Underground's switch to bored tunnels at a deeper level towards the end of the 19th century. Prior to the replacement of manual excavation by the use of boring machines, Victorian tunnel excavators developed
9240-690: The job, he is the second-longest serving head of Amtrak since it was formed more than 40 years ago. On December 9, 2015, Boardman announced in a letter to employees that he would be leaving Amtrak in September 2016. He had advised the Amtrak Board of Directors of his decision the previous week. On August 19, 2016, the Amtrak Board of Directors named former Norfolk Southern Railway President & CEO Charles "Wick" Moorman as Boardman's successor with an effective date of September 1, 2016. During his term, Moorman took no salary and said that he saw his role as one of
9360-468: The large TBM to the site of tunnel construction, or (alternatively) the high cost of assembling the TBM on-site, often within the confines of the tunnel being constructed. There are a variety of TBM designs that can operate in a variety of conditions, from hard rock to soft water-bearing ground. Some TBMs, the bentonite slurry and earth-pressure balance types, have pressurized compartments at the front end, allowing them to be used in difficult conditions below
9480-607: The lower deck with automobiles above, now converted to one-way road vehicle traffic on each deck. In Turkey, the Eurasia Tunnel under the Bosphorus , opened in 2016, has at its core a 5.4 km (3.4 miles) two-deck road tunnel with two lanes on each deck. Additionally, in 2015 the Turkish government announced that it will build three -level tunnel, also under the Bosporus. The tunnel
9600-483: The older method of tunnelling in compressed air, with an airlock/decompression chamber some way back from the TBM, which required operators to work in high pressure and go through decompression procedures at the end of their shifts, much like deep-sea divers . In February 2010, Aker Wirth delivered a TBM to Switzerland, for the expansion of the Linth–Limmern Power Stations located south of Linthal in
9720-540: The operation of empty and loaded trains at the same time. The temporary way is replaced by the permanent way at completion, thus explaining the term " Perway ". The vehicles or traffic using a tunnel can outgrow it, requiring replacement or enlargement: An open building pit consists of a horizontal and a vertical boundary that keeps groundwater and soil out of the pit. There are several potential alternatives and combinations for (horizontal and vertical) building pit boundaries. The most important difference with cut-and-cover
9840-607: The other hand, the creation of the Los Angeles–Seattle Coast Starlight from three formerly separate train routes was an immediate success, resulting in an increase to daily service by 1973. Needing to operate only half the train routes that had operated previously, Amtrak would lease around 1,200 of the best passenger cars from the 3,000 that the private railroads owned. All were air-conditioned, and 90% were easy-to-maintain stainless steel. When Amtrak took over, passenger cars and locomotives initially retained
9960-471: The overall market share fell to 46% by 1950, and then 32% by 1957. The railroads had lost money on passenger service since the Great Depression , but deficits reached $ 723 million in 1957. For many railroads, these losses threatened financial viability. The causes of this decline were heavily debated. The National Highway System and airports , both funded by the government, competed directly with
10080-433: The paint schemes and logos of their former owners which resulted in Amtrak running trains with mismatched colors – the "Rainbow Era". In mid-1971, Amtrak began purchasing some of the equipment it had leased, including 286 EMD E and F unit diesel locomotives, 30 GG1 electric locomotives and 1,290 passenger cars. By 1975, the official Amtrak color scheme was painted on most Amtrak equipment and newly purchased locomotives and
10200-660: The private railroads pool their services into a single body. Similar proposals were made in 1965 and 1968 but failed to attract support. The federal government passed the High Speed Ground Transportation Act of 1965 to fund pilot programs in the Northeast Corridor , but this did nothing to address passenger deficits. In late 1969, multiple proposals emerged in the United States Congress , including equipment subsidies, route subsidies, and, lastly,
10320-510: The project is completed. If a tunnel is going to be long, multiple shafts at various locations may be bored so that entrance to the tunnel is closer to the unexcavated area. Once construction is complete, construction access shafts are often used as ventilation shafts , and may also be used as emergency exits. The New Austrian Tunnelling method (NATM)—also referred to as the Sequential Excavation Method (SEM) —was developed in
10440-485: The proper machinery must be selected. Large infrastructure projects require millions or even billions of dollars, involving long-term financing, usually through issuance of bonds . The costs and benefits for an infrastructure such as a tunnel must be identified. Political disputes can occur, as in 2005 when the US House of Representatives approved a $ 100 million federal grant to build a tunnel under New York Harbor. However,
10560-407: The railroads, which, unlike the airline, bus, and trucking companies, paid for their own infrastructure. American car culture was also on the rise in the post-World War II years. Progressive Era rate regulation limited the railroad's ability to turn a profit. Railroads also faced antiquated work rules and inflexible relationships with trade unions. To take one example, workers continued to receive
10680-594: The remaining mileage is over rail lines owned by other railroad companies. While most track speeds are limited to 79 mph (127 km/h) or less, several lines have been upgraded to support top speeds of 110 mph (180 km/h), and parts of the Northeast Corridor support top speeds of 160 mph (260 km/h). In fiscal year 2022, Amtrak served 22.9 million passengers and had $ 2.1 billion in revenue, with more than 17,100 employees as of fiscal year 2021. Nearly 87,000 passengers ride more than 300 Amtrak trains daily. Nearly two-thirds of passengers come from
10800-443: The requirement. In early 2002, David L. Gunn replaced Warrington as seventh president. In a departure from his predecessors' promises to make Amtrak self-sufficient in the short term, Gunn argued that no form of passenger transportation in the United States is self-sufficient as the economy is currently structured. Highways, airports, and air traffic control all require large government expenditures to build and operate, coming from
10920-482: The risk of encountering unforeseen ground conditions. In planning the route, the horizontal and vertical alignments can be selected to make use of the best ground and water conditions. It is common practice to locate a tunnel deeper than otherwise would be required, in order to excavate through solid rock or other material that is easier to support during construction. Conventional desk and preliminary site studies may yield insufficient information to assess such factors as
11040-405: The riverbed of their respective rivers. The PRR and LIRR lines would converge at New York Penn Station , an expansive Beaux-Arts edifice between 31st and 33rd Streets in Manhattan. The entire project was expected to cost over $ 100 million. The contract for building the East River Tunnels was awarded to S. Pearson & Son in 1903. Originally, the tunnel would have comprised two tubes, but this
11160-532: The rolling stock began appearing. Amtrak inherited problems with train stations (most notably deferred maintenance ) and redundant facilities from the competing railroads that once served the same communities. Chicago is a prime example; on the day prior to Amtrak's inception, intercity passenger trains used four different Chicago terminals: LaSalle , Dearborn , North Western Station , Central , and Union. The trains at LaSalle remained there, as their operator Rock Island could not afford to opt into Amtrak. Of all
11280-468: The schedule. Amtrak uses a sliding scale, with trips under 250 miles (400 km) considered late if they are more than 10 minutes behind schedule, up to 30 minutes for trips over 551 miles (887 km) in length. Outside the Northeast Corridor and stretches of track in Southern California and Michigan, most Amtrak trains run on tracks owned and operated by privately owned freight railroads. BNSF
11400-528: The sheer size of the excavation. This contrasts with many traditional stations on London Underground , where bored tunnels were used for stations and passenger access. Nevertheless, the original parts of the London Underground network, the Metropolitan and District Railways, were constructed using cut-and-cover. These lines pre-dated electric traction and the proximity to the surface was useful to ventilate
11520-508: The six busiest stations by boardings are on the NEC: New York Penn Station (first), Washington Union Station (second), Philadelphia 30th Street Station (third), and Boston South Station (fifth). The other two are Chicago Union Station (fourth) and Los Angeles Union Station (sixth). On-time performance is calculated differently for airlines than for Amtrak. A plane is considered on-time if it arrives within 15 minutes of
11640-498: The sixth president in 1998, with a mandate to make Amtrak financially self-sufficient. Under Warrington, the company tried to expand into express freight shipping, placing Amtrak in competition with the "host" freight railroads and the trucking industry . On March 9, 1999, Amtrak unveiled its plan for the Acela Express, a high-speed train on the Northeast Corridor between Washington, D.C. and Boston. Several changes were made to
11760-754: The spring. Most of these routes were restored to daily service in late-May 2021. However, a resurgence of the virus caused by the Omicron variant caused Amtrak to modify and/or suspend many of these routes again from January to March 2022. Amtrak is required by law to operate a national route system. Amtrak has presence in 46 of the 48 contiguous states, as well as the District of Columbia (with only thruway connecting services in Wyoming and no services in South Dakota ). Amtrak services fall into three groups: short-haul service on
11880-431: The system with an aim to reduce costs, speed construction, and improve its corporate image. However, the cash-strapped railroad would ultimately build relatively few of these standard stations. Amtrak soon had the opportunity to acquire rights-of-way. Following the bankruptcy of several northeastern railroads in the early 1970s, including Penn Central, which owned and operated the Northeast Corridor (NEC), Congress passed
12000-638: The time, LIRR trains ran to Long Island City, where passengers took ferries across the East River to the 34th Street Ferry Terminal in Manhattan. As part of the extension, the LIRR became a subsidiary of the Pennsylvania Railroad. In December 1901, because of the high cost of building a bridge, the plans were modified so that the PRR would construct the North River Tunnels under the Hudson River. The New York Tunnel Extension quickly gained opposition from
12120-626: The trains serving Dearborn Station, Amtrak retained only a pair of Santa Fe trains, which relocated to Union Station beginning with the first Amtrak departures on May 1, 1971. Dearborn Station closed after the last pre-Amtrak trains on the Santa Fe arrived in Chicago on May 2. None of the intercity trains that had served North Western Station became part of the Amtrak system, and that terminal became commuter-only after May 1. The trains serving Central Station continued to use that station until an alternate routing
12240-400: The tunnel drive, the depth of the tunnel, the logistics of supporting the tunnel excavation, the final use and the shape of the tunnel and appropriate risk management. There are three basic types of tunnel construction in common use. Cut-and-cover tunnels are constructed in a shallow trench and then covered over. Bored tunnels are constructed in situ, without removing the ground above. Finally,
12360-409: The tunnels except in emergency situations because of ventilation concerns, so the LIRR uses DM30AC dual-mode locomotives to power a few trains from non-electrified lines into and out of Penn Station during rush hours. East of Penn Station, tracks 5–21 merge into two 3-track tunnels, which then merge into the East River Tunnels' four tracks. The tunnels end and the tracks rise to ground level east of
12480-472: The tunnels were drained, corrosion continued to occur inside the tunnels, and the signal systems broke down with increasing frequency compared to before the storm. Amtrak , which owns the tunnels, originally proposed to start repairing the tunnels in 2019 at a cost of $ 1 billion, with each tunnel being closed for two years. However, due to delays in the East Side Access project (which would give LIRR riders
12600-422: The two portals common at each end, though there may be access and ventilation openings at various points along the length. A pipeline differs significantly from a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods. A tunnel may be for foot or vehicular road traffic , for rail traffic, or for a canal . The central portions of
12720-428: The two most common being bored tunnels or immersed tubes , examples are Bjørvika Tunnel and Marmaray . Submerged floating tunnels are a novel approach under consideration; however, no such tunnels have been constructed to date. During construction of a tunnel it is often convenient to install a temporary railway, particularly to remove excavated spoil , often narrow gauge so that it can be double track to allow
12840-508: The west, the four tracks are Lines 1-3-2-4 south to north (with three LIRR tracks between Lines 2 and 3, and Sunnyside Yard approach tracks scattered between the passenger tracks). East of Harold, Lines 1-3 become LIRR Main Line Tracks 4-2 south to north, while Lines 2-4 become LIRR Main Line Track 3 and the westward Port Washington main. (Harold was rearranged in 1990; until then Lines 2-4 became
12960-424: The westward Port Washington and the westward Hell Gate track). Amtrak's Superliner fleet cannot use the tunnels due to the inadequate clearances, so Amtrak instead uses Amfleet and Viewliner sets. Download coordinates as: Tunnel A tunnel is an underground or undersea passageway. It is dug through surrounding soil, earth or rock, or laid under water, and is usually completely enclosed except for
13080-459: Was adopted in March 1972. In New York City , Amtrak had to maintain two stations ( Penn and Grand Central ) due to the lack of track connections to bring trains from upstate New York into Penn Station; a problem that was rectified once the Empire Connection was built in 1991. The Amtrak Standard Stations Program was launched in 1978 and proposed to build a standardized station design across
13200-414: Was aided by troop movement and gasoline rationing . The railroad's market share surged to 74% in 1945, with a massive 94 billion passenger-miles. After the war, railroads rejuvenated their overworked and neglected passenger fleets with fast and luxurious streamliners. These new trains brought only temporary relief to the overall decline. Even as postwar travel exploded, passenger travel percentages of
13320-566: Was constructed to provide a second harbour crossing and to alleviate traffic congestion on the Sydney Harbour Bridge , without spoiling the iconic view. Other reasons for choosing a tunnel instead of a bridge include avoiding difficulties with tides, weather, and shipping during construction (as in the 51.5-kilometre or 32.0-mile Channel Tunnel ), aesthetic reasons (preserving the above-ground view, landscape, and scenery), and also for weight capacity reasons (it may be more feasible to build
13440-609: Was fired. Gunn's replacement, Alexander Kummant (2006–08), was committed to operating a national rail network, and like Gunn, opposed the notion of putting the Northeast Corridor under separate ownership. He said that shedding the system's long-distance routes would amount to selling national assets that are on par with national parks, and that Amtrak's abandonment of these routes would be irreversible. In late 2006, Amtrak unsuccessfully sought annual congressional funding of $ 1 billion for ten years. In early 2007, Amtrak employed 20,000 people in 46 states and served 25 million passengers
13560-803: Was increased dramatically. In subsequent years, other short route segments not needed for freight operations were transferred to Amtrak. In its first decade, Amtrak fell far short of financial independence, which continues today, but it did find modest success rebuilding trade. Outside factors discouraged competing transport, such as fuel shortages which increased costs of automobile and airline travel, and strikes which disrupted airline operations. Investments in Amtrak's track, equipment and information also made Amtrak more relevant to America's transportation needs. Amtrak's ridership increased from 16.6 million in 1972 to 21 million in 1981. In February 1978, Amtrak moved its headquarters to 400 North Capitol Street NW, Washington D.C. In 1982, former Secretary of
13680-418: Was later expanded to four tubes. The project was led by Chief Engineer Alfred Noble. Work began in 1904. The four tunnels were built simultaneously, digging east from Penn Station, west from Long Island City, and east and west from shafts just east of First Avenue. The tunnel technology was so innovative that in 1907 the PRR shipped an actual 23-foot (7.0 m) diameter section of the new East River Tunnels to
13800-635: Was leased from Sweden for test runs from October 1992 to January 1993, followed by revenue service between Washington, D.C. and New York City from February to May and August to September 1993. Siemens showed the ICE 1 train from Germany, organizing the ICE Train North America Tour which started to operate on the Northeast Corridor on July 3, 1993. In 1993, Thomas Downs succeeded Claytor as Amtrak's fifth president. The stated goal remained "operational self-sufficiency". By this time, however, Amtrak had
13920-544: Was named Amtrak President and CEO. In addition to Atlas Air, Flynn has held senior roles at CSX Transportation , SeaLand Services and GeoLogistics Corp. Anderson would remain with Amtrak as a senior advisor until December 2020. As Amtrak approached profitability in 2020, the company undertook planning to expand and create new intermediate-distance corridors across the country. Included were several new services in Ohio, Tennessee, Colorado, and Minnesota, among other states. During
14040-445: Was publicly announced less than two weeks before operations began. Amtrak began operations on May 1, 1971. Amtrak received no rail tracks or rights-of-way at its inception. All of Amtrak's routes were continuations of prior service, although Amtrak pruned about half the passenger rail network. Of the 366 train routes that operated previously, Amtrak continued only 184. Several major corridors became freight-only, including
14160-499: Was published, a documentary was created, six locomotives were painted in Amtrak's four prior paint schemes , and an Exhibit Train toured the country visiting 45 communities and welcoming more than 85,000 visitors. After years of almost revolving-door CEOs at Amtrak, in December 2013, Boardman was named "Railroader of the Year" by Railway Age magazine, which noted that with over five years in
14280-462: Was reduced to under 3 hours due to system improvements and limited stop service. This improvement was cited as a reason why Amtrak grew its share of intercity trips between the cities along the corridor. Elsewhere in the country, demand for passenger rail service resulted in the creation of five new state-supported routes in California, Illinois, Missouri, Oregon and Pennsylvania, for a total of 15 state-supported routes. Amtrak added two trains in 1983,
14400-701: Was superseded by the Madrid M30 ringroad , Spain, and the Chong Ming tunnels in Shanghai , China. All of these machines were built at least partly by Herrenknecht . As of August 2013 , the world's largest TBM was " Big Bertha ", a 17.5-metre (57.5 ft) diameter machine built by Hitachi Zosen Corporation , which dug the Alaskan Way Viaduct replacement tunnel in Seattle, Washington (US). A temporary access shaft
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