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.

With the final pile installed last Friday, the drill rig has been disassembled and removed from the site. Crews are now busy tying rebar to form the foundation slab, and placing the under-slab plumbing and electrical conduit for the ozone generator building. The first concrete pour is expected next week.

Once crews begin pouring concrete for the generator building, the rebar crews will prepare the subgrade and foundation for the new ozone contactor building.

Concrete pours will resume next week, continuing every few days over the coming months. Neighbors will notice an increase in concrete truck traffic on Mapleton Drive and Kenthorpe Way, noise and potential vibration, depending on locations.

Site improvements and hardscaping

Hardscaping and site improvements are ongoing across the site. Work continues on the Mapleton Drive and Kenthorpe Way sidewalks and swales, located along the plant frontages.

Site improvements, sidewalks and hardscaping work includes digging and preparing the site, placement of materials, forming, compacting and pouring concrete. During this work, neighbors close to the site should expect some noise and vibration from the movement of equipment.

Neighborhood construction meetings – next meeting September 20

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, September 20 at 6 p.m. Please attend to stay up-to-date on construction progress in West Linn and ask the project team questions.

Completion date

Construction at the plant is expected to be complete in spring 2017 – this includes all landscaping and site work.

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 Labor Day, no work will take place on Monday, September 5.

WTP construction tours

The next tour will be held on Thursday, September 22 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.