The two discussed a new health study on the hydraulic fracturing drilling method that could be thorough enough to trump all others in a debate that has split New York for five years.

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Among the various offshore drilling practices, ultra-deepwater drilling is the most expensive and technically challenging method since it involves drilling at water depths of over 5, 000 feet.

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The loss of the hi-tech equipment has focused attention on the data gathered by the tried-and-tested method of drilling through the ice by hand.

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Other ideas include drilling into the aquifer beneath the city and pumping cool water along the tunnels (a method already used to cool the Royal Festival Hall), or installing chillers in the trains that would freeze blocks of ice while the trains were above ground which would then keep them frosty on the underground sections.

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That cadre endures a month of tough drilling with Webb, learning her techniques and sensibilities, as well as how to teach her method to new hires.

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