Friday - December 19, 2014

Water Treatment Plant Construction Update

backfilled clearwell

brick veneer

Utility work on Kenthorpe Way

Portland General Electric (PGE) is installing the alternative electrical feed to the water treatment plant on Kenthorpe Way. For more information, please contact PGE’s Project Manager, Chris Jewett at: or 503-672-5481.

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

Work continues on the structural support, electrical fixtures, roof joists and mechanical piping for the finished water pump station.

Coating is being applied to the exterior of the clearwell. Once a section is complete, the area around the outside of the clearwell will be backfilled. This is expected to take several weeks to complete and, at times, will require the use of the large vibratory compactor to compress the fill and gravel. Neighbors located close to the site and south of the site on Mapleton Drive can expect an increase in vibration during the fill placement and compaction of the clearwell.


Ballasted flocculation – center of site

Mechanical equipment continues to be installed within the structure, and electricians are installing conduit and electrical fixtures. Structural steel will begin to be placed over the next few weeks.

Chemical & electrical buildings – center of site

Structural steel and decking is being placed for the chemical building. Architectural work has started on the electrical building, including insulation for the roof and wall framing. Later this month, the electrical and chemical buildings will be tented, to allow weather barrier coatings to be applied in dry conditions. Once the coating is complete, work will begin on installing the brick veneer.

Miscellaneous work: piping, conduit and vaults – east and center of site

Piping, vault and conduit work continues over the next few weeks on the east of the site, near the solids storage tank and the center of the site, in between the electrical building and finished water pump station. Neighbors close to the site may notice an increase in vibration during the excavation and backfilling as part of this work.

Solids storage building and mechanical dewatering building – northeast of site

Architectural work has started on the solids storage building. Brick veneer and siding panels are being applied over the next month (brick veneer). Over the next week, the mechanical dewatering building will be “tented” to allow exterior coatings and veneer placement. The white coating shown the photo is the weather resistant barrier that will be applied to the exterior of all new buildings.

Work hours

Work hours are Monday to Friday from 7 a.m. to 7 p.m. and Saturdays from 9 a.m. to 5 p.m. There will be no work Dec. 25 - 26 or Jan. 1.

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.

WTP construction tours

The next tour will be held on Jan. 22, 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.

Neighborhood construction meetings – next meeting is Jan. 6.

The next meeting will be Jan. 6 at 7:30 a.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 under “past meetings and events.”

We wish everyone a safe and happy holiday season.

For more information, please contact us.