In August 2013, the Cities of Tualatin and Wilsonville, Washington County, and Metro all adopted an Intergovemental Agreement that endorsed the recommendations in the Transportation Refinement Plan. The recommendations in that Plan will form the transportation assumptions for the Basalt Creek Concept Plan. [Download the Recommendations – 2MB]
A combination of new and improved roadways through the Basalt Creek area are envisioned:
- A new five-lane east-west roadway. The new roadway would be an extension of SW 124th Avenue, aligned south of Tonquin Road and extending to Boones Ferry Road. This has been called the “East-West Concept.”
- Improvements to existing roadways in the area, such as Tonquin Road, Grahams Ferry Road, Boones Ferry Road, and Day Road.
- Preserving the ability to construct two new I-5 overcrossings. These overcrossings are recommended as long-term improvements and likely not needed until 2035 or later, depending on growth.
Active transportation improvements include bike lanes and sidewalks consistent with Washington County urban standards, as well as integration of the regional Ice Age Tonquin Trail into the transportation network and consideration of an off-street multi-use path that extends east of I-5. These details will be further refined during concept planning for the area.