But no… This is an actual (F) train in queens.
http://pix11.com/2014/10/30/giant-drill-bit-narrowly-misses-packed-f-train/
This looks like a situation similar to some years back when a contractor not using current maps punched a hole in the roof of one of the freight tunnels under the North Branch of the Chicago River with a pile driver. The mudchicken may have some comments about this situation.
Perhaps the weirdest part was that the drill was working on the East Side Access Project…
Looks like a drywall screw…
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Giant drill ? No way. A 10" augur bit is about the minimum size except for some mineral probes. If you look at the picture closely the incline on the bit is at most 3" so shaft could be 4". I.ve seen 10 foot diameter augur bits.
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Bet some surveyor(s) are going to be seeing a review board ? MC ? Probably will be persona non gratis for NY City work ? That old saw measure at least twice cut once should have been appropriate? .
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another 2 feet over the augur would have doen some real damages and fatalities ?
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Why in the world in NY City did the drilling rig not have a cavity stop installed. Can apply much prssure which may have been necessary to cut thru subway roof. As soon as any bit goes suddeny 6" or so the drill stops. Maybe contractor taking a short cut ?
Similar incident in Toronto a month or so ago. New railway construction drove an H beam through the top of the tunnel. They were going to leave the beam in as a plug but it rained and dirt and stuff washed through and piled up on the tracks.
In today’s cities when it comes to construction, there is more to look out for below ground than there is above ground.
Hmmm, I’ll have to keep this in mind if I ever add a subway to the O gauge layout.