Thursday - October 6, 2016

Walls taking shape for ozone buildings!

Placing wall forms in a serpentine pattern for the ozone basin.

Tying rebar and securing wall forms to prepare for the first wall pour.

First wall pour for the ozone basin.

Concrete mason blocks are placed for the walls of the ozone generator building.

Water Treatment Plant Construction Update

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

Ozone system – northeast of site

All slabs have been poured for the two remaining structures: the ozone generator building and ozone basin. Over the last few weeks, crews have been working hard to place the wall forms in a serpentine pattern for the new ozone contactor basin. The first wall pour occurred today (pictured above). The next wall pour is expected to occur late next week or early the following week.

Work is also underway on the duct bank and piping for the ozone buildings and lagoons, in the northeast corner of the site. This involves excavating, placing piping and conduit, and backfilling (compacting) fill.

Concrete mason walls are taking shape for the ozone generator building, and should be complete next week. Crews will soon begin installing the structural steel framing. Neighbors close to the site may notice an increase in metal-on-metal noise during this work, as steel beams are hammered into place.

Over the next few weeks, concrete pours will continue about twice a week. During pours, neighbors will notice an increase in concrete truck traffic on Mapleton Drive and Kenthorpe Way, noise and potential vibration, depending on locations.

The contractor is sandblasting surfaces of the newly poured concrete to roughen the construction joints before an adjacent wall or deck is poured. Neighbors close to the site will hear intermittent noise during sandblasting, which occurs within a few days of a concrete pour.

Site improvements and hardscaping

Hardscaping and site improvements are ongoing across the site. Crews are in the process of forming the emergency access driveway entrance on the southeast corner of the site. Freestanding stone walls are also being formed along the Kenthorpe Way frontage.

Site improvements, stone walls, sidewalks and hardscaping work includes digging and preparing the site, placement of materials, forming, compacting, pouring concrete and saw-cutting stone. During this work, neighbors close to the site should expect an increase in intermittent noise and vibration from equipment.

Neighborhood construction meetings – next meeting October 18

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, October 18 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. The pedestrian pathway, linking Mapleton Drive to Kenthorpe Way, will be opened after construction is complete.

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.

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.