Friday - June 5, 2015

WTP sedimentation basin demolition now complete

An excavator uses the concrete processors (jaws) to break up large pieces of concrete.

A concrete crusher is loaded with chunks of concrete, which is crushed and stockpiled for reuse on site.

Large surge tank.

Water Treatment Plant Construction Update

Information about onsite work includes:

Sedimentation basin demolition – northwest of site

Crews have finished demolishing the sedimentation basins, including use of the hydraulic hammer to break up the concrete in the base of the foundation and concrete crushing. Thank you to neighbors for your patience during this noisy activity. The demolition crews and large pieces of equipment will be demobilizing from the site this week.

New filter excavation – northwest of site

The new filters will be constructed where the sedimentation basins were previously located. To kick-start this work, crews will begin building some haul roads and placing rock to facilitate a large excavation for the foundation of the filters. Excavation is expected to take about two weeks. During this time, neighbors should expect an increase in truck traffic on Mapleton Drive and Kenthorpe Way, noise and potential vibration. Once the excavation is complete, crews will begin installing auger cast piles for the foundation.

New administration building – north of site

The 60 auger cast piles are installed to support the foundation for the new administration building. Crews are placing rock, preparing the subgrade, and forming the elevator pit and walls. Soon, concrete slabs will be poured for the foundation. Neighbors close to the site, or on Kenthorpe Way, should expect an increase in noise during this time.

Finished water pump station and electrical buildings – center of site

Structural siding is almost complete for the finished water pump station and electrical buildings, although this is weather dependent.

Miscellaneous piping work and surge tank installation – east and center of site

Work continues on excavating, forming, pouring concrete and placing piping in the east and center of the site. The large surge tank (pictured left) is now installed in the center of the site, which connects the newly installed piping to the finished water pump station.

Neighborhood construction meetings – next meeting June 16 at 6 p.m.

The neighborhood construction meetings continue to be held twice a month.
Meeting schedule:

  • The first Tuesday of the month at 7:30 a.m., at Burgerville, 18350 Willamette Drive, West Linn.
  • The third Tuesday of the month at 6 p.m., at the Robinwood Station, 3706 Cedar Oak Drive, West Linn.

The next meeting will be June 16 at 6 p.m. at the Robinwood Station. 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 Saturdays.

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.