Monday - November 16, 2015

Walls continue to take shape for new structures at the treatment plant

Wall forms are installed for the washwater recovery basin (foreground). The filters are taking shape in the background, along with the administration building shown on the left.

Paving on Mapleton Drive – truck traffic increase on Kenthorpe Way

Final paving and roadway restoration on Mapleton Drive, Kenthorpe Way and Old River Road will be conducted by the City of West Linn and its contractors.

Starting this week, the city plans to place a 4-inch base layer of asphalt over the roadway where the raw water pipe was installed on Mapleton Drive, between the east end of the street and the east entrance of the treatment plant. During this work, the existing asphalt will be ground, the roadway prepared and graded, and the new asphalt will be placed. Work is expected to take about 4-5 days to complete.

During the paving work, neighbors on Kenthorpe Way may notice an increase in truck traffic, as the paving contractor will use Kenthorpe Way and the treatment plant to enter and exit from Mapleton Drive.

For more information about paving, please contact the City of West Linn Public Works Department on 503-722-5500.

Administration building – north of site

Structural work continues to progress well for the administration building. On the second story, structural steel and decking has been installed and the interior walls are now being framed. During the structural steel work, neighbors may notice an intermittent metal-on-metal like noise as crews install the steel and rebar. Plumbers and electricians are working on installing 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. The shoring support for the suspended slabs is underway, and crews are forming interior walls.

Washwater recovery basin – northwest of site

In early November, the last slab was poured for the basin foundation and, last week, crews started placing rebar and forming supports for the walls. Concrete pours are occurring 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.

Miscellaneous piping work – southeast of site

In early December, crews expect to begin removing an existing temporary overflow line, installing a new 48-inch overflow line from the clearwell to the lagoons, and then installing an 8-inch water line for the City of West Linn near the east and south of the site. These activities are expected to take about six weeks or so to complete. Work involves excavating, forming and pouring concrete, 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 Nov. 17 at 6 p.m.

The next neighborhood construction meeting will be held at Robinwood Station Tuesday, Nov. 17 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 Thanksgiving, there will be no work on Thursday, November 26. A small crew may be working on site on Friday, November 27 and Saturday, November 28.

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, call the hotline at 503-697-6502, or attend a neighborhood construction meeting.