View Full Version : OT: Repairing the NYC Subways

11-09-2012, 08:59 AM
Last week, after sandy, there was a long thread about the problems NYC would face in having to repair the subway tunnels after Sandy. In this morning's New York Times there's an article "Subway Repairs Border on The Edge of Magic" (http://www.nytimes.com/2012/11/09/nyregion/new-york-subways-find-magic-in-speedy-hurricane-recovery.html?hp&_r=0).

It talks about how they moved trains and equipment to the high ground before the storm hit, so that the tunnels and tracks were all clear of equipment. How they evaluated where and how much the flooding would be and pre-positioned pump trains so that they could easily get to areas to empty tunnels, etc, etc (it sounded like part of their decision was what the time to repair would be on tunnels --- trying to position things so that they could get some lines back in service quickly).

One item brought up in the earlier thread was finding spare/replacement parts for damaged/destroyed stuff, some of it very very old or with limited availability for spares. From the NYT article:

Mr. Lhota (the chairman of the transit authority) said that despite the authority’s trove of ancient underground equipment, the authority’s warehouses in Queens and the Bronx were rarely without a required replacement part.

“Things break all the time,” he said. “We have inventory.”


11-09-2012, 12:06 PM
The article mentions that they lost several interior walls at the South Ferry station, which was totally flooded. That could be because of the phenomenon described by Dennis and others, of water behind the walls and the loss of equilibrium caused by rapid pumping.

But the rapid pumping may have prevented worse damage, if it got the water out before seepage into the surrounding soil occurred.