The boring machine that will create Seattle's State Route 99 tunnel was given the name Bertha, after Bertha Knight Landes, a former Seattle mayor. The five-story machine is the largest-diameter tunnel borer in the world. "Like the SR 99 tunneling machine, Bertha Knight Landes was one of a kind. It's only fitting that the machine bears her name," said former Seattle Mayor Charley Royer in a press release.

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