124th Avenue Extension


WWSP-124th-Ave-Extension-Project-MapWashington County is extending 124th Avenue north from Wilsonville to Tualatin-Sherwood Road to improve regional mobility and provide access to future commercial and industrial lands between Tualatin and Sherwood. The new road extension will include one travel lane in each direction. In addition to the 124th Avenue extension, safety improvements will be made on Tonquin Road and Grahams Ferry Road. Video simulations of the 124th and Tualatin-Sherwood alignments have been developed for illustrative purposes.

The Willamette Water Supply Program and Washington County are partnering to install a portion of the new pipeline during construction of the 124th Avenue extension. This partnership highlights the shared benefits of government collaboration by reducing traffic and construction impacts, and saving taxpayers and ratepayers millions of dollars.  To learn more read the 124th Avenue Extension Fact Sheet

Construction of the pipeline and new roadway begins in  2016, and is scheduled to be complete by 2018. To learn more about 124th Avenue extension construction, read the 124th Avenue Extension Construction Fact Sheet.

This Willamette Water Supply Program pipeline segment will be capped and filled with water to ensure stability until the rest of the pipeline is constructed. The pipeline is anticipated to be fully activated in 2026.

Our Reliable Water

Program Timeline

Developing the new Willamette water source will take over a decade.

Willamette Water Supply Program

Willamette Water Supply Program