Program Overview

The Tualatin Valley Water District and the City of Hillsboro are partnering on the Program to develop the mid-Willamette River at Wilsonville as an additional water supply source.

This new system, when operational in 2026, will provide a reliable water supply for the region by helping water system operators balance supply during times of drought or other supply interruptions, as well as recover more quickly after a large natural disaster. Planning for this important water project is underway and includes a new water filtration plant, more than 30 miles of water pipelines, and water storage tanks — all built to modern seismic standards.

The Program team is making great progress, with several activities nearly complete:

  •  The Willamette Water Supply Program installed the first section of pipeline as part of the Kinsman Road Extension Project.
  • New water pipeline is installed as part of Washington County’s 124th Avenue Extension Project.
  • In 2017, a section of the new water pipeline was built under the Cornelius Pass/TV Highway intersection in the South Hillsboro area.

We appreciate the continued cooperation of all the WWSP pipeline and facility neighbors who have allowed access to their property for environmental and geologic studies.

The information was utilized to develop the required Federal and State permit applications submitted April 5, 2017. Federal and State agencies will review these applications to determine possible effects of the Program on environmentally sensitive areas. If the Program can’t avoid the impacts to environmentally sensitive areas, the permits will identify appropriate mitigation measures.

The Oregon Department of State Lands public comment period on the Willamette Water Supply Program’s permit application closed June 8, 2017.  The US Army Corps of Engineers public comment period closed November 13, 2017.

Limited access to private property bordering the pipeline route may be requested in the future by Program staff in order to comply with Federal and State requests for more information, analysis, or surveys during their permit application reviews.

For those with property bordering water facilities, we will be in touch with you as our plans progress and if an easement on your property will be needed.

The pipeline route  remains a work in progress and will continue to be refined as the design develops.

Program Map & Schedule

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Our Reliable Water

Efficient Regional Coordination

“We’re fortunate to have coordination among our regional water providers, like the Tualatin Valley Water District and the City of Hillsboro, to make sure we have a safe, resilient water supply as the region grows.” ----Councilor Kathryn Harrington, Metro Council District 4

Program Timeline

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

Willamette Water Supply Program

Willamette Water Supply Program