Wednesday - June 15, 2016

Final phase of demolition underway at the WTP

Concrete processors (jaws) used during demolition of filters.

Crews are forming and placing the wall in the northwest corner.

Water Treatment Plant Construction Update

The third and final phase of construction is officially underway at the treatment plant! This 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.

Demolition - north of site

The final stage of demolition is progressing on the existing filters, and will soon transition to the old administration building located on the north of the site. This week, a second concrete processor arrived to begin breaking up the concrete and components of the filters.

So far, crews have only needed to use the concrete processors (jaws) during demolition of the filters. However, they are fast approaching the filter foundation and will soon begin using the hydraulic hammer to break up the concrete. Unfortunately, use of the hydraulic hammer is a very noisy activity. During this work, neighbors will notice an increase in noise and potential vibration, depending on locations.

Demolition is expected to continue through early July. 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. Demolition crews have been predominantly working ten hour days, 7 a.m. – 5 p.m. Monday to Friday and 9 a.m. – 5 p.m. on Saturdays.

Site improvements and landscaping

New site walls have been poured in the south corners of the site. This week, crews are forming and placing the wall in the northwest corner, near the construction trailers. Soon, work will begin on preparing and forming sidewalks around new structures.

Hardscaping and landscaping improvements for the rain garden area in the northwest corner of the site have begun. 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 equipment.

Ozone system

The LOX storage tank and equipment arrived to the site in late May and has now been installed. Work on the remainder of the ozone system will occur in the coming months.

Yard piping

Crews are working on installing an 8-inch potable water line for the City of West Linn on the southeast corner of the site. This is expected to be complete by the end of next week.

Neighborhood construction meetings – next meeting June 21

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, June 21 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. No work will take place at the site on Monday, July 4.

WTP construction tours

The next tour will be held on Thursday, July 28 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 contact us or attend a neighborhood construction meeting.