Tumwater, WA

City of Tumwater

2007-2008; 2009-2011

The Tumwater Boulevard Interchange is an area of economic growth in south Tumwater. State office buildings along Linderson Way contribute significant commute traffic to the interchange and future commercial development to the west will overload the ramp terminal intersections. SCJ led an alternatives analysis and transportation study that led to the selection of a diamond interchange with tear drop roundabouts.

Subsequent to the transportation study, SCJ prepared 90% PS&E documents to position the project for construction funding. Our work included WSDOT approvals for the interchange geometry/channelization (Plan for Approval) and bridge widening and seismic retrofit (Preliminary Bridge Plan). We also prepared a draft NEPA Documented Categorical Exclusion with special studies including a report for the Mazama pocket gopher.


“Over the years, I have worked collaboratively with SCJ Alliance staff on many projects involving both planning and design. SCJ has always served with a high degree of professionalism, integrity, expertise and most importantly, a true desire to improve our community through the results of their work.”

Jay Eaton, Public Works Director
City of Tumwater


“This project is a great example of the breadth of SCJ’s transportation services from planning to design. We got started in the very beginning, helping to shape ideas on how to best address future growth, and we led the way in implementing the vision through final design of the future tear drop roundabouts.”

Scott Sawyer, PE
Project Manager