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Tryon Creek facility needs membrane bioreactor to meet standards for discharge into Willamette River.

PMG FILE PHOTO - The Tryon Creek Wastewater Treatment Plant, built in 1964, will need approximately $130 million of investment to bring it up to new environmental standards.

Lake Oswego and Portland are pursuing extensive upgrades for the Tryon Creek Wastewater Plant.

According to Portland Bureau of Environmental Services, the facility requires a $130 million investment — split 50/50 between Portland and Lake Oswego under the current agreement — to either repair or replace the technology to meet new standards. One of those potential technologies is a membrane bioreactor which public works has researched and vetted over the past several months.

The Tryon Creek Wastewater Treatment Plant was built in 1964, and while it's been maintained properly, the technology doesn't have the capacity to meet new environmental standards for effluent discharged to the Willamette River by the Oregon Department Department of Environmental Quality. The facility is owned by the City of Portland, and Lake Oswego contracts with Portland to provide wastewater services at the plant.

In a step forward that will help inform and educate the City of Lake Oswego's decision as it pursues options for replacing the Tryon Creek Wastewater Treatment Plant, the Lake Oswego City Council approved a contract to retain the law firm Hawkins Delafield & Wood, LLP, to support the issuing of a request for proposals from three firms identified by public works as being qualified for the project.

Click here to read the full version of this story in the Lake Oswego Review.


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