Friday - October 10, 2014

Water Treatment Plant Construction Update

Crews installing concrete blocks for the walls of the chemical building

Finished water pump station and clearwell – south and center of site

Exterior coating has been applied for the finished water pump station and the area around the structure has been backfilled. This week, crews started filling the clearwell tank for the water test, which continues over the next few weeks.

Ballasted flocculation – center of site

Installation of mechanical equipment continues. Water testing has begun on the two tanks in the south of the structure, and will continue over the next few weeks. 

Temporary storage building – southeast of site

Work continues on installing a temporary storage building on the southeast corner of the site, which should be complete in the next few weeks. It will store large equipment arriving on site, to be installed later. The building will be removed near the end of the project.

Solids storage and mechanical dewatering buildings – northeast of site

Mechanical equipment including pumps and piping have been placed in the solids storage tank. Structural trusses and roof systems will be installed through the month.

The week of October 20, a large crane will arrive to install screw presses into the mechanical dewatering building in the northeast of the site. Screw presses will remove the remaining water from the solids and the dry soil that results is trucked offsite for disposal or beneficial reuse.

Chemical & electrical buildings – center of site

This week, work began on the concrete blocks for the walls of the chemical building. This will continue over the next few weeks. Structural steel and decking is being placed for the electrical building.

Miscellaneous piping – center of site

Installation of the 30” – 48” piping across the site continues, including excavating, placing the pipe, encasing it in concrete and backfilling the trench. Starting mid-next week, thecorridor where piping has been installed north of the clearwell and south of the ballasted flocculation will be backfilled. This is expected to take about two weeks to complete. During this time, neighbors located close to the site on Mapleton Drive or Kenthorpe Way may experience an increase in vibration, as the large compactor compresses fill.

Work hours

Work hours are Monday to Friday from 7:00 a.m. to 7:00 p.m. and Saturdays, from 9:00 a.m. to 5:00 p.m. 


Site plan and new glossary

Please refer to the site plan for locations of each structure o our new glossary of terms formore information on construction and operation of the WTP.

WTP construction tours – next tour is October 16

October’s tour will be held next Thursday at 10 a.m. Tours will then resume in the new year, 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. 

Neighborhood construction meetings – first and third Tuesday of the month

The next meeting will be held on October 21, at 6 p.m. in the downstairs restaurant area at Burgerville, 18350 Willamette Drive, West Linn. Please come along to stay updated on construction progress in West Linn and ask questions of the project team. All meeting materials are posted online under “past meetings and events.” 

For more information, please email, call the hotline at 503-697-6502.