DEP Invoice or Financial Record, September 30, 2001

NYC 9/11 Public Portal Document

Continued From Page Al Areas vt total collapse , aja, the chief engineer for New York Assessing the Subway Damage City Transit. “There is really no way Beneath Ihe World Trade Center rubble. New York City Transit /■ tWofldT^eCentBi'XiS.' to do it that way.’’ has sealed off 1,800 feet of the damaged 1 and 9 subway line Besides the damage to the 1 and 9 between two concrete walls. The methods for stabilizing the Une. a corridor and equipment room road overlying a damaged section are shown below. Concrotewatt . oiuriw^ pecl^ . ' near a wall of the Cortlandt Street station on the N and R line was punctured by a large section of the Debris area from Debris fieri i Worfd Tiade .. facade from 2 World Trade Center. collapsed building Ceriier2destroyed Engineers — who have shored up (7 World Trade Center 1 that station with thick wooden pillars — said they were testing the walls and ceilings with motion detectors called inclinometers to determine whether the huge breach had left the walls and ceilings structurally un­ sound. But even if they are sound, the engineers said, subway service will probably not resume through those tunnels for about six months. The loss of the 1,9, N and R will be a blow to the west side of Lower ^ei'^.ljelenipi^'^lyT Manhattan as it tries to rebuild and assure residents and workers that 'Ws they will not be isolated. But transit officials, who were unable yesterday Original steel to provide ridership numbers for the Subway cars supports affected stations, note that there are to scale (many are subway lines nearby that can pick up Source.' MetropoiKan Tran^poflstion Authariiy^New Ycrk C/!y liansii buckled) the slack. pre' Because Lower Manhattan was “tTiJ New York Titucs the population center when the first subway lines were built, a tangle of lines converge in a relatively small iSK- area — including the 4 and 5 at Wall Street, which is only a thousand feet from the Rector Street station on the 1 and 9. The Bowling Green station on the 4 and 5 is also a little more than a thousand feet from the 1 and 9 South Ferry station. And there is the C and E station at the World Trade Center, which was only slightly dam- aged and could reopen as soon as streets above it are repaired and !■ P' ’I 61 ■*

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reopened. Rebuilding about 6,200 feet of the 1 ^Ij and 9 line, mcluding the Cortlandt, KI 1« r-1 Lt- ■ v Rector and South Ferry stations, ® would be a huge and time-consuming | -J™ job under even the best of circum- stances. But in interviews, subway engineers described tremendous ob- stades before rebuilding plans can ./ '''T-TSSg/S-'Y/- even be drawn up. For example, where the line runs >»■' beneath West Broadway, adjacent to r. the rubble from the collapse of 7 ' World Trade Center, many steel sup- ' •■• ■-r- < .. ’^3^ .r ..... port beams in the tunnels have fall- en, leaving sections of the road and sidewalks above with little underpin- :■ ning except hope. To shore up the street so recovery The Vesey Street entrance to the Cortlandt Street station remains largely intact, but other parts of the station equipment can use it, transit officials and some tunnels that serve tire 1 and 9 lines were heavily damaged. Rebuilding could take years. have agreed to pump about 220 feet of the tuiuiel full of concrete — Street and Cedar Street, to prevent River water out and that is now opejied in 1918, were — like most of enough concrete to cover an entire water from flowing into the rest of threatened. the rest of the subway — built with football field a foot deep. Months later, when the debris is cleared, the subway if catastrophic flooding Considering tlie devastation near steel arches called bents, spaced five transit workers will then have to occurs. die trade center, and the fact that the feet apart along the length of the carve away all that new concrete to The plugs were installed because tunnels were only five feet below the tunnels. The tunnels are relatively rebuild the line. tlie 1 atid 9 tunnels run right up road surface in some places, com­ shallow and were built using the cut- They will also have to demolish against the western wall of what is plete tunnel collapses were not as and-cover method, in which trenches two steel-and-concreie plugs, three called the bathtub, the waterproof extensive as some engineers had were dug in soft soil and then framed feet thick, that were built Wednesday barrier that rings the World Trade feared. with steel arches. The arches were in the 1 and 9 tunnels near Chambers Center basement to keep Hudson This is partly because the tunnels. surrounded by brick and concrete on

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