Thursday - December 3, 2015

Work on track for second phase of startup and testing at the plant in early 2016

Applying fiberglass sheathing.

A crew member welds a filter backwash pipe, which connects to the washwater basin.

Water Treatment Plant Construction Update

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

Overall, crews are making solid progress on phase B construction activities, which includes building the new administration building, new filters and new washwater recovery basin. Work is on track to begin startup and testing for this phase of work early next year, with the new filters and basin being operational by late spring.

Administration building – north of site

Crews poured the suspended slab this week to form part of the roof.

Work is now progressing on the second and third story framing as well as the application of the fiberglass sheathing around the walls of the structure.

Crews are working hard to begin installing the roof and siding, however, this is weather dependent. Plumbers and electricians continue to install the HVAC system, fire protection, plumbing and electrical conduit.

New filters – northwest of site

Concrete pours continue for the new filters, with several trucks arriving and departing the site during a pour. The shoring support for the suspended slab deck is underway, and crews continue to form interior walls. Inlet and outlet piping is in the process of being installed through the filters, connecting them to the washwater basin and ballasted flocculation.

Washwater recovery basin – northwest of site

Rebar crews are very busy placing rebar and forming supports for the walls of the washwater basin. About half the walls have been poured for the structure with the remainder being poured over the coming weeks. Concrete pours occur about twice a week for the washwater basin and filters. During concrete pours, there is an increase in noise and truck traffic on Kenthorpe Way.

Once all the concrete is in place for the walls, crews will water test and then apply a coating to the concrete. These activities are weather dependent. After the coatings are applied, crews will backfill around the basin—this is expected to occur early next year.

Miscellaneous piping work – southeast of site

Work to remove an existing temporary raw water line, install a new 48-inch overflow line from the clearwell to the lagoons, and then install an 8-inch water line for the City of West Linn near the east and south of the site is now expected to begin in mid-late December. These activities are expected to take about six weeks to complete. 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 this activity.

Neighborhood construction meetings – next meeting Dec. 15 at 6 p.m.

The next neighborhood construction meeting will be held at Robinwood Station Tuesday, Dec. 15 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 Saturdays.
In observance of Christmas and New Year’s Day, no work will take place on Friday, Dec. 25 or Friday, Jan. 1. A small crew may be working on site on Saturday, Dec. 26 and Saturday, Jan. 2.

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.