Friday - January 15, 2016

Progress continues on new overflow line at the treatment plant

An aerial photo of the plant during construction in fall 2015

Installing an overflow pipeline from the clearwell to the lagoons

Water Treatment Plant Construction Update

Despite the rain, ice and cold, crews continue to progress through phase B construction activities, including the new administration building, filters and washwater recovery basin. Startup and testing for this phase of work is expected to begin over the coming months, with the new filters and basin operational by late spring. Once the new administration building and filters are complete, the plant will embark on the final stage (phase C) of construction, which includes demolition of the existing administration building and current filters, construction of the ozone system, final landscaping and restoration of the site.

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

Washwater recovery basin – northwest of site

The water testing is complete for the washwater basin! Starting Monday, January 18, insulation will be installed and crews will begin backfilling around the basin—this is expected to take about two weeks to complete. During this activity, neighbors located close to the site should expect an increase in intermittent noise and vibration as the large compactor is used to compress the fill.

Miscellaneous piping work – southeast of site

Crews have removed a temporary raw water line near the southeast corner of the site and are now installing a new 48-inch overflow pipeline from the clearwell to the lagoons. Following this, an 8-inch water line for the City of West Linn will also be installed in the same area. These activities are expected to continue through early February. Work involves excavating, placing pipe, removing pipe and backfilling the trench. Neighbors close to the site should expect an increase in noise and vibration during these activities.

Administration building – north of site

Architectural work continues for the administration building. The structure has been re-tented to allow for the roofing and insulation to be installed in dry conditions. Plumbers and electricians continue to install the HVAC system, plumbing and electrical conduit throughout the structure. Over the next few weeks, work will begin on the frames and windows.

New filters – northwest of site

Concrete pours continue about twice a week for the new filters, with several trucks arriving and departing the site on Kenthorpe Way during a pour.

Crews expect to pour the last slab for the deck next week. Inlet and outlet piping continues to be installed through the filters, connecting to the washwater basin and clearwell.

Neighborhood construction meetings – next meeting January 19

The next neighborhood construction meeting will be held at Robinwood Station on Tuesday, January 19 at 6 p.m. Please attend to stay up-to-date on construction progress in West Linn and ask the project team questions.

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.

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. As a reminder, the contractor will be working this Monday, January 18 and the Partnership office will be closed in observance of Martin Luther King Day.

WTP construction tours

The next tour will be held on January 28 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.