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"There were tall mounds of mud and soft soil. The boring machine that was being used by the workers lay upside down, blocking all passage beyond."

Fed up with Los Angeles traffic, Elon Musk launched The Boring Co. with two tweets in 2016, promising “to build a tunnel boring machine and just start digging.”

Drilling was also paused on Wednesday after the boring machine hit a metal girder, causing some damage to its blades and a six-hour delay as rescuers worked to clear the obstacle.

About halfway through the afternoon of the second day with the heavy boring machine slamming me around, I felt a call from nature and I shut the machine down and went into the house to answer that call.

Builders must somehow thread the needle below streets and utilities, while crisscrossing above the 1989 downtown transit tunnel, when a tunnel boring machine digs south from Uptown toward Sodo.