Lake Oswego Water Treatment Plant

Facility Description

The City of Lake Oswego has operated a drinking water treatment plant in West Linn’s Robinwood neighborhood since 1968. The Lake Oswego Tigard Water Partnership plans to upgrade and expand the treatment plant, located between Kenthorpe Way and Mapleton Drive, to meet current and future drinking water needs. The upgraded plant will supply Lake Oswego and Tigard, and will continue to serve as West Linn’s sole source of emergency and backup water supply.

History of the Water Treatment Plant

Built in 1968, Lake Oswego’s water treatment plant was originally located in unincorporated Clackamas County. The area was later annexed by West Linn. Through its 44-year history the plant has earned a reputation as a good neighbor. The City of West Linn has approved land use applications for upgrades and expansions three times since the plant was built.

It is not uncommon for wastewater and water treatment plants to be located in residential areas. South Fork Water Board’s treatment plant – jointly owned by West Linn and Oregon City – is located in Oregon City’s Park Place neighborhood. Extensive upgrading, expansion and treatment modifications have occurred there over the past several years to serve the two communities.

Water Treatment Plant – Good Neighbor Plan

Lake Oswego Tigard Water Partnership began discussions with the Robinwood Neighborhood Association in early 2010, sharing details of the water treatment plant expansion, listening to suggestions, and finding ways for the upgraded water plant to continue to be a good neighbor. Two years later, the Partnership has met with Robinwood neighbors more than 20 times, developing a Good Neighbor Plan (pdf, 308 kb) that contains the Partnership’s commitments for design–construction–operations of the new facility. Neighborhood input played a big role in design concepts with the addition of numerous plant layout changes and amenities requested by neighbors.

How to Get Involved

  • Click here for upcoming meeting dates.
  • Sign up to receive email notices.  Mark the ‘Water Treatment Plant' as your interest.
  • Click here to contact us by email.
  • Call the Water Hotline (503) 697-6502.

Additional Information

You can find regular updates on the Work Underway page.

Field Updates

Thursday - October 23, 2014

Water Treatment Plant Construction Update

Crews working on the decking and steel for the electrical building.

Attendees at the WTP construction tour last week – tours will resume in the New Year.

Finished water pump station and clearwell – south and center of site

Concrete blocks are being placed and walls completed for the finished water pump station. The water test is progressing for the clearwell – the tank is now filled about halfway and will be complete next month.

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Friday - October 17, 2014

West Linn Pipeline Construction Update

The barge carrying 250 foot lengths of pipe arrived at Meldrum Bar Park in Gladstone on Wednesday this week. Over the next week and a half the pipe will be welded into one continuous string prior to pullback.

Volunteers add gravel to the pathway shoulder.

Construction updates include all current or upcoming pipeline work for the project in West Linn.

  • Horizontal directional drilling under the river, near Mary S. Young Park – pipe pullback starting soon
  • Mary S. Young Park pathway improvements
  • Highway 43 pipeline construction (night work) –starts next month
  • Neighborhood Construction Meetings – first and third Tuesdays of the month

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Monday - October 13, 2014

Boaters urged to use caution on the Willamette River during pipeline project

In the news...

The Oregon State Marine Board and the city of Lake Oswsego are urging boaters to use extreme caution while boating on the Willamette River between Meldrum Bar and Clackamette Park from Oct. 14 through Nov. 14.

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