Tubular Pressurized Tank

The NYT on the tasks involved in fixing New York’s water system:

The most immediate tasks are to fix a valve at the bottom of a 700-foot shaft in Dutchess County so pumps will eventually be able to drain the tunnel, and to ensure that the tunnel does not crack or collapse while it is empty.

For this, the city has enlisted six deep-sea divers who are living for more than a month in a sealed 24-foot tubular pressurized tank complete with showers, a television and a Nerf basketball hoop, breathing air that is 97.5 percent helium and 2.5 percent oxygen, so their high-pitched squeals are all but unintelligible. They leave the tank only to transfer to a diving bell that is lowered 70 stories into the earth, where they work 12-hour shifts, with each man taking a four-hour turn hacking away at concrete to expose the valve.

One Response to “Tubular Pressurized Tank”

  • Chaz Says:

    That’s really pretty incredible, but what I want know is who the hell went down there to install the valve and put in all that concrete in the first place, and why so damn deep?