SR 520 W. Lake Sammamish Pkwy to SR 202 Interchange & HOV Project

Client: WSDOT

Role: Roadway Engineer | CH2M

Dates: April 2007 to July 2009

Stephanie served as the roadway design engineer for the Paving Design, Roadway Sections, Roadway Profiles, Summary of Quantities, as well as Engineer’s Estimate plans in the Plans, Specifications and Estimate (PS&E). This work included pursuing and optimizing the roadway design and footprint to minimize environmental impacts and concerns since the project is bounded by Bear Creek to the north as well as numerous wetland and sensitive areas. Stephanie developed the three Design Deviations, an Evaluate Upgrade, a Project Analysis and multiple technical memorandums for the Design Documentation Package. She also coordinated with WSDOT, the internal design departments and subconsultant designers on design issues as well as managed quantities, bid items and estimates for the entire project. This project widens both directions of SR 520, and completes the SR 202 and West Lake Sammamish Parkway interchanges. The SR 520/SR 202 interchange was upgraded to tie into our previously designed Stage 3A direct access flyover ramp from westbound SR 202 to SR 520.