From a January 2011 article about this effort, they explain it this way:
At 300 ft below the surface, the team are working in 10 bars of atmospheric pressure. It means by channeling stream water through a simple hose, they can fire the water they collect at ancient mud with great force - and blast their way through. Note also that the author calls being suspended on rope in a 130m shaft "stomach churning". Read more: http://www.dailymail.co.uk/news/article-1347451/Cavers-excavate-warren-underground-passages-north-England.html#ixzz1d8x6TOfe julia -----Original Message----- From: Ed Goff <edwin.g...@gmail.com> To: Lee H. Skinner <skin...@thuntek.net> Cc: texascavers list <texascavers@texascavers.com> Sent: Tue, Nov 8, 2011 12:34 pm Subject: Re: [Texascavers] Cave connection in England yields 70 mile system "In the difficult conditions 300ft below, the team experienced ten bars of atmospheric pressure..." The poor buggers. Have the bodies been recovered yet? ;) Ed On Tue, Nov 8, 2011 at 10:37 AM, Lee H. Skinner <skin...@thuntek.net> wrote: Great cave connections anywhere in the world always make good reading. Boxhead Pot and Notts Pot have been connected to make up the Three Counties System with 70 miles mapped! http://tinyurl.com/8xor92q Lee Skinner
