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Rich Johnson, P.E. is Group Director of Seattle Office Bridges and Tunnels at HNTB Corporation. He can be reached at rjohnson@hntb.com.
This article is currently only available in PDF format, please click the link to the top right.
Rich Johnson, P.E. is Group Director of Seattle Office Bridges and Tunnels at HNTB Corporation. He can be reached at rjohnson@hntb.com.