Author Archives : Andrew Herten, P.E.

About the author ⁄ Andrew Herten, P.E.

Andrew Herten is a Senior Project Engineer with HNTB Corporation in Bellevue, WA. Andrew managed the cut-and-cover tunnel structural design as well as project-wide post-design services for the SR 99 Tunnel Project. (aherten@hntb.com)

SR 99 Tunnel in Seattle

The recently completed SR 99 Tunnel was constructed as part of the Washington State Department of Transportation’s (WSDOT) Alaskan Way Viaduct Replacement Program. The existing Alaskan Way Viaduct (AWV) is an aging double-deck highway structure in Seattle, Washington, that was built in the 1950s. …

Jan, 2019 By Yang Jiang, Ph.D., P.E., S.E. and Andrew Herten, P.E. In Feature Comments 0

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