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.

Crews forming and pouring the new sidewalk and swales.

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.

Ozone system – north of site

The auger cast pile drill rig is back in operation, installing the final stage of seismic piles for the new ozone system. Pile drilling is expected to continue through the end of this month.

Several large deliveries containing long rebar cages continue to arrive at the site. Neighbors will also notice an increase in concrete truck traffic on Mapleton and Kenthorpe, noise and potential vibration during the auger cast pile drilling activities.

Once the auger cast piles are installed, crews will begin tying rebar to form the foundation slabs before concrete is poured.

Site improvements and landscaping

The security fence along the Kenthorpe Way plant frontage has shifted to the edge of the curb, so work can begin on the sidewalk. Work is also progressing on the Mapleton Drive frontage, with crews forming and pouring the new sidewalk and swales. To enable construction of the new sidewalk, overhanging tree branches on three trees along the Mapleton plant frontage will be trimmed in the next week.

Work continues on the rain garden in the northwest corner of the site. This includes excavators digging and preparing the site, placement of materials, forming hardscaping, compacting fill and pouring concrete for the sidewalk. During this work, neighbors close to the site should expect some noise and vibration from the movement of equipment.

Miscellaneous lagoon work – northeast of site

In mid-August, crews expect to begin working on the existing lagoons located in the northeast corner of the site. Work includes saw-cutting a portion of the wall, miscellaneous piping and pump work. Work is expected to take about a week to complete. Neighbors located near the lagoons should expect an increase in noise during this time.

Neighborhood construction meetings – next meeting August 16

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, August 16 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.

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.