What is this Project?

This project creates a reliable water system that delivers high-quality drinking water from the Clackamas River to the communities of Lake Oswego and Tigard. Learn more...

The new drinking water treatment method is conventional filtration plus ozone. Learn more... The new water system is the most earthquake resilient in Oregon. Learn more... It isn't easy being green, but the new system is sustainable and energy efficient. Learn more...

Project News

Thursday - August 25, 2016

1,150 concrete piles now installed at the plant!

Crews prepare the ozone generation building foundation by tying rebar to reinforce the concrete slab before it is poured.

Water Treatment Plant Construction Update

Information about onsite work is outlined below. Please note, schedules are subject to change.

Ozone system – north of site

All 1,150 auger cast piles are now installed at the plant! That’s more than 10 miles (56,000 linear feet) of 24” holes drilled in the ground and filled with concrete. These deep, concrete piles support all the new structures and pipelines at the site, which keeps the plant protected from major earthquakes.

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Tuesday - August 9, 2016

Plant demolition complete, pile drilling resumes for new ozone system

After augering a deep hole and filling it with grout, the crane lifts a long rebar cage before inserting it into the newly drilled hole.

Water Treatment Plant Construction Update

Information about onsite work is outlined below. Please note, schedules are subject to change.

Demolition - north of site

Good news: the final phase of demolition is complete! Crews are now cleaning up and removing any remaining debris, but are no longer using the hydraulic hammer or the concrete processors (jaws).

Neighbors, thank you for your patience over the past several weeks with the demolition activities. The use of the hydraulic hammer has been very disruptive, and we appreciate everyone’s understanding as they have been working on this final stage of demolition.

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Thursday - July 21, 2016

After three years, LO-Tigard water project is online

Final work on treatment plant remains, but main pipeline is now supplying water to both cities

In the news...

The Lake Oswego-Tigard Water Partnership project is now fully online and providing water to both cities.

The $254 million project still has one major milestone ahead: completion of the upgraded water treatment plant in West Linn. But the project’s new pipeline has already taken over as the primary water supply for Tigard and Lake Oswego after three years of construction.

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