Tumwater City Hall and all City facilities will be closed to the public until further notice. Visit our COVID-19 webpage for more information.

Online City ServicesResources for Businesses | Resources for Residents Tumwater 2 Go

Police, fire, and emergency medical response services are available as usual. Emergency? Call 9-1-1.

Trosper Road & Capitol Boulevard Reconfiguration

Press Enter to show all options, press Tab go to next option

Trosper Road & Capitol Boulevard Reconfiguration

2018 – 2021 Design and Right-of-Way, 2021– 2022 Construction

The Trosper Road and Capitol Boulevard Reconfiguration project is the first and most expensive project derived from the Capitol Boulevard Corridor Plan (CBCP). The project is intended to address congestion at the intersection caused by the current traffic volume, and to accommodate forecasted traffic growth. 

Project Description

Improvements include reconstruction of the Capitol & Trosper intersection, modifications to the northbound Interstate 5 interchange ramps, and construction of a new street between Trosper Road and Lee Street. The project includes construction of three roundabouts and reconstruction of all transportation infrastructure within the limits.

Road Closures

The project will result in major traffic impacts during construction which is currently planned for 2021 through 2022. Specific traffic impacts and detours will be provided as the project gets closer to construction.

Trosper Road & Capitol Boulevard ReconfigurationPDF file

Project Funding

This approximately $12.5 million project is partially funded by Washington State Transportation Improvement Board (TIB) and the City’s Transportation Fund in the Capital Facilities Plan:

  • TIB Funding: $6,629,120
  • Local Funding: $5,908,280

Project Personnel

  • City of Tumwater Project Manager for Right of Way: Jay Eaton
  • City of Tumwater Project Manager for Design and Construction: Brandon Hicks
  • Design Firm: SCJ Alliance

If you have any questions or concerns, please contact Brandon Hicks, City Engineer, at (360) 754-4140 or email

Stay Connected

Register for “Construction & Traffic Alerts” to receive email notifications about traffic impacts and service interruptions as the project progresses at