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Massive machine to bore flood-relief tunnel in Dallas
The world's largest hard rock water tunnel-boring machine, dubbed "Big Tex," is ready and set to begin work soon on Dallas' 38-foot-wide Mill Creek Tunnel, which will handle up to 9 million gallons of water per minute to curtail flooding during intense rain. The tunnel will extend 5 miles at a depth of 100 to 150 feet.
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