Water Treatment Plant Master Plan Update

WTP Master Plan Update

Water Treatment Plant Master Plan Hearing Cancellation


The Water Treatment Plant 2015 Master Plan Update has been withdrawn and a hearing will not be held on February 8, 2017. Based on preliminary comments from the Planning Commission, City staff have decided to postpone a hearing on the 2015 Master Plan Update until such time as a more targeted document can be prepared that focuses directly on Wilsonville facilities.

The 2015 Master Plan Update is a joint project of six participating entities (Tualatin Valley Water District and the Cities of Wilsonville, Hillsboro, Sherwood, Beaverton, and Tigard) and the information presented in the document is targeted primarily on the water delivery needs, design criteria, and siting for future water treatment facilities to serve those other entities.  While the document does address and evaluate near to mid- term improvements to the existing Plant serving Wilsonville and Sherwood, that information is scattered throughout the larger document, and is therefore not as easy to follow as would be a slimmer document targeted on the current Wilsonville Plant.

City staff will be moving forward with preparation of a “mini” Master Plan just for the existing plant, which will incorporate appropriate information from the current document, plus additional targeted information. The current 2015 Update document will remain available on this web page (see below). Please watch this web page for updates. 

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.