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Design begins on the Willamette Water Supply Water Pipeline from Frances Street to the Sunset Highway

Post Date:08/09/2019 8:39 am

In the next 25 to 50 years, the Hillsboro community is expected to need roughly twice the amount of water it uses today. While the upper-Tualatin River will remain Hillsboro's primary water source, the City of Hillsboro is partnering with the Tualatin Valley Water District and the City of Beaverton to develop the mid-Willamette River at Wilsonville. This will create an additional and redundant water supply source to meet our community's needs today, in the future, and during emergencies.

Design and construction of the new Willamette River system is underway and includes building:

  • A modified water intake on the mid-Willamette River at Wilsonville
  • A state-of-the-art water filtration facility near Sherwood
  • Water supply tanks in Beaverton
  • More than 30 miles of large diameter transmission water pipeline from Wilsonville to Hillsboro

When operational in 2026, the new Willamette River system will be one of Oregon’s most seismically resilient water systems. It will be built to better withstand natural disasters, protect public health, and speed regional economic recovery through restoring critical services more quickly.

South Hillsboro Pipeline Project

Design is now starting on the 3.3 mile segment of the water pipeline from Frances Street to the Sunset Highway. The alignment for the 48-inch water pipeline follows Cornelius Pass Road and includes a section through Orenco Woods Nature Park and crossings of Rock Creek and Beaverton Creek. At the north end, the pipeline will connect to the Tualatin Valley Water District facility near the intersection of Cornelius Pass Road and Sunset Highway.

Design of the alignment begins late summer with site investigations including geo-technical, environmental and cultural work and land surveying. This work is occurring on both private property and in the public right-of-way. Expect to see the team in the field through the fall doing the analysis. During this time, lanes of Cornelius Pass Road may be closed for short periods of time.  The lane closures will be signed and flaggers will control traffic to limit delay times.

Construction of this section of pipeline in Hillsboro is currently scheduled to begin in fall of 2021. Learn more online.

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