9/11 Allgemein
06.08.2015 um 15:59...und wer es ganz genau wissen möchte:
https://www.nae.edu/Publications/Bridge/EngineeringandHomelandSecurity/WorldTradeCenterBathtubFromGenesistoArmageddon.aspx
https://www.nae.edu/Publications/Bridge/EngineeringandHomelandSecurity/WorldTradeCenterBathtubFromGenesistoArmageddon.aspx
PATH Tunnels
Concurrent with rescue work in New York, Port Authority engineers were investigating the condition of the PATH tunnels in Jersey City, New Jersey, where the Exchange Place Station, which was at an elevation 5 feet lower than the WTC PATH Station, had served as a sump for fire water, river water, and broken water mains discharging into the bathtub. Inspection indicated that water in the tunnels between New York and New Jersey had completely filled the north tunnel at the midriver low point. Pumps were immediately put into action to keep Exchange Place Station from flooding. As much as 3,000 gallons per minute were pumped from the north tunnel for a 12-hour period each day. Tests of the water were inconclusive as to the source; however, most was believed to come from the vast amounts of water that were poured onto the debris to extinguish continuing fires. Within days, a 16-foot long low-strength concrete plug was placed in each tube as a seal in the event that the bathtub walls were breached and the tunnels fully flooded. The plugs were designed to withstand an 80-foot head of water pressure and will be removed once the slurry walls are fully secured (Figure 6). The Port Authority is currently preparing to remove the plugs in preparation for rehabilitation of the tunnels.