And a train was actually hit! Fortunately it was stationary on the tracks, but it crushed the side panel of the driver's carriage. Neither the driver nor any passengers were injured in the incident. The drill rig was drilling to install ground source heating or geothermal heating for a hotel when at a depth of 20 to 25 meters (65 to 82-ft), the drillers noticed that they lost resistance when they punched through the subway tunnel. Upon withdrawing the drill stem, they were missing the bottom 2.5-m according to a local police official. Story at The Local. (Photo of N.Y. Subway from runnx)

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nk agarwal said:

	... It can only happen if the co. is highly unprofessional. thnks nk agarwal
	report abuse vote down vote up

February 03, 2010
Votes: +0

engineer said:

	... Tunnelling Engineering
	report abuse vote down vote up

February 04, 2010 | url
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