Monday - May 16, 2016

Second major phase of plant construction coming to a close

New filters - northwest of site

New filters - northwest of site

In June demolition of the existing filters and administration building will begin.

Foundation for the new site walls.

An exciting milestone is expected to be reached later this week with the operation of the new filters! With the startup and commissioning of the filters, work at the site is successfully transitioning to its third and final phase. The final phase of work includes demolishing the existing filters and administration building, installing the new ozone system and final site improvements, restoration and landscaping.

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

New filters - northwest of site

Startup and commissioning of the new filters has been progressing well. Four of the six filters are now operating and by the end this week, five filters should be in operation and the plant will be able to treat and deliver over 32 million gallons of water a day!

Administration building – north of site

Plant staff will begin relocating into the new administration building next week!

Demolition of existing filters and administration building – north of site

In June, the contractor expects to begin demolishing the existing filters and administration building located on the north of the site (pictured above).

In early June, excavators with concrete processors (jaws) or hydraulic hammers will begin breaking up the concrete and the structures. During this work, there will be an increase in noise and potential vibration, depending on neighbors’ locations. In the past, crews have needed to use the hydraulic hammer more frequently at times to break up the concrete in the bases of the foundations. Unfortunately, use of the hydraulic hammer is a very noisy activity. Crews will aim to use the concrete processors (jaws) as much as possible.

This demolition work is expected to take a month to complete, and will be the final demolition activities to occur at the plant. The concrete will be stockpiled and crushed on-site as the work continues. Crushing the material for later reuse on site reduces truck traffic in the neighborhood.

Large delivery – expected soon

A large delivery carrying a tank and equipment for the new ozone system is expected soon. A notice will be sent with more information on the date the delivery is expected to occur.

Site improvements

Curb and gutter replacement work is almost complete along the Kenthorpe Way frontage of the plant, and soon will be underway on the Mapleton Drive plant frontage.

The foundation for the new site walls has been poured in the south east corner of the site by the finished water pump station and surge tank (pictured above), and will soon be poured near the construction trailers.

Over the coming months, crews will continue hardscaping and landscaping improvements across the site. This work includes excavators digging and preparing the site, placement of materials, forming hardscaping and backfilling/compacting fill. During this work, neighbors close to the site should expect some noise and vibration from the movement of the equipment.

Neighborhood construction meetings – next meeting May 17

Meetings are held once a month at the Robinwood Station, 3706 Cedaroak Drive, West Linn, on the third Tuesday of the month at 6 p.m. The next neighborhood construction meeting will be held on Tuesday, May 17 at 6 p.m. Please attend to stay up-to-date on construction progress in West Linn and ask the project team questions.

Work hours

Work hours are 7 a.m. to 7 p.m., Monday to Friday, and 9 a.m. to 5 p.m. on Saturday. In observance of Memorial Day, no work will take place at the site on Monday, May 30. A small crew may be working on site on Saturday, May 28.

WTP construction tours

The next tour will be held on Thursday, May 26 at 10 a.m. Tours are held every two months on the fourth Thursday. Advance registration is required and space is limited. Please contact us and indicate in the subject line you would like to attend the next tour, along with your contact information.

Site plan and glossary

Please refer to the site plan for locations of each structure or our glossary of terms for construction and operation of the WTP.

For more information, please email, call the hotline at 503-697-6502, attend a neighborhood construction meeting or visit