Water Treatment Plant Master Plan Update

WTP Master Plan Update

The City of Wilsonville is partnering with the Tualatin Valley Water District (TVWD) and the City of Hillsboro to update the long range Master Plan for the Willamette River Water Treatment Plant, built in 2002. TVWD and Hillsboro are looking to the Willamette River as their long range water source for up to 150 million gallons per day, and the Master Plan will evaluate the additional facilities needed to meet that goal as well as to meet Wilsonville’s future needs.

The Wilsonville Planning Commission will receive a briefing on January 11th, and hold a formal hearing on the Master Plan Update at their February 8th meeting, where they will receive public comment. The Master Plan will then be considered by City Council in late February / early March. The links below are provided for the public to review the entire master plan document and an on-line virtual Open House has also been set up for the public to provide comment before the hearing on February 8th.

For more information on the overall Willamette Water Supply Program, please visit their website at www.OurReliableWater.org.

Staff Contacts
Staff can be reached via telephone at 503-682-4960
  • Eric Mende, Capital Projects Engineering Manager

Project Information


  • Participants:  Tualatin Valley Water District - Hillsboro, Wilsonville, Beaverton, Sherwood and Tigard.
  • Primary Consultant:  Carollo Engineers
  • Contractor:   N/A
  • Funded By: Participant Contributions (Wilsonville: Water Operating and Water SDC)
  • CIP Reference #1122

Master Plan Document by Chapter

Virtual Open House – Comment Form


Comments received through this forum will be received through January 27th, to allow time for staff to summarize the comments for the hearing on February 8th. If you desire a response, you will be asked for an email address, otherwise, comments will be anonymous.