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ENR > Transportation > Unique Segment System Marks Los Angeles Rail Line - McGraw-Hill Construction | ENR
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| A joint venture is using what Metro officials say is the first- ever use of a double-gasketed, convex-convex joint system to line 1.8-mile twin tunnels and keep them functional in a seismic event. Tunneling on the $898-million, six-mile Gold Line light-rail extension to east Los Angeles kicked off in February. A joint venture of Traylor Brothers/ Frontier ...
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