I-405 / I-5 TO SR 169 Stage 2 Widening & SR 515 Interchange – Design Build

Client: WSDOT

Role: Roadway Engineer – Segment Lead | CH2M

Dates: August 2008 to June 2010

Stephanie was the roadway design engineer for the Roadway Design Plans as well as the Channelization Plans of this $84 million design-build project. Stephanie optimized three of WSDOT’s RFP Design Deviations to reduce the project scope, schedule and budget. The project consists of a new half-diamond interchange on I-405 at SR 515 (Talbot Road), improved access ramps to the I-405 interchanges at SR 167 and SR 169, constructed one additional auxiliary lane on I-405 in each direction between SR 167 and SR 169, and reconstructed the Benson Road Bridge over I-405. Stephanie’s work included coordination with the City of Renton and WSDOT staff to complete the goals of the project while minimizing the footprint and impacts to adjacent right of way and sensitive areas.