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Topic: steel pipe

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January 8, 2014 at 4:23 PM

Drilling begins to try to remove pipe blocking Bertha

Crews on the Highway 99 tunnel project were drilling a second vertical shaft Wednesday, in hopes of breaking and removing the steel pipe that has blocked tunnel-boring machine Bertha for more than a month. The first 5-foot-diameter shaft was finished Tuesday, without hitting steel, said Laura Newborn, spokeswoman for the state Department of Transportation…


Comments | Topics: bertha, Highway 99 tunnel, steel pipe