New York's Rondout-West Branch Tunnel, we read—"45 miles long, 13.5 feet wide, up to 1,200 feet below ground and responsible for ferrying half of New York City’s water supply from reservoirs in the Catskill Mountains," as the New York Times describes it—is leaking "some 20 million gallons each day."
[Image: "A 24-foot-long pressurized tank serves as living quarters for divers repairing a valve 700 feet below. They breathe a mixture of mostly helium." Photo by Alan Zale for The New York Times, courtesy of The New York Times].]At one point, however, the city hired a crew of near-permanent deep-sea divers to fight these leaks: specifically, New York "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."
This vision of alien vocals ringing out amongst a long-term diving crew living deep beneath the streets of the city is like something straight out of the B.P.R.D.
But, even without such fantastical overtones, the very idea that parts of the city are only inhabitable with the aid of bespoke manufactured atmospheres—in this case, a 24-foot-long tank of helium—suggests extreme new design directions for the future of urban infrastructure.
The rest of the article—as well as the Friends of the Pleistocene post that points to it—is worth reading in full.
(Earlier on Pruned: Deep-Sea Living in the Underground Tunnels of New York City).
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