Friday - December 5, 2014

Water Treatment Plant Construction Update

Roof trusses have been installed

Utility work on Kenthorpe Way – started this week

Portland General Electric (PGE) is installing the alternative electrical feed to the water treatment plant on Kenthorpe Way (pictured right). The new lines are being installed underground, requiring PGE to access the right-of-way area along Kenthorpe Way between Old River Road and the Water Treatment Plant, during the hours of 7 a.m. and 4:30 p.m. Cones are placed around the equipment to assist with impacts. For more information, please contact PGE’s Project Manager, Chris Jewett: or 503-672-5481.

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

Concrete blocks are now complete for the finished water pump station walls. Work continues on the structural support, roof joists and mechanical piping.

Coating is being applied to the exterior of the clearwell. Once this 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, it 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.

Ballasted flocculation – center of site

Mechanical equipment continues to be installed within the structure. Roof curbs were poured this week.

Solids storage building – northeast of site

Work is progressing on the structural trusses and roof systems for the solids storage building.

Chemical & electrical buildings – center of site

Structural steel and decking is being placed for the chemical building. Roof trusses have been installed (pictured above). This week, the curb for the roof of the electrical building was poured. A tent will now be placed over the building, which allows the architectural 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

Crews are making good progress on installing conduit and vaults 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. This work includes excavating, installing piping and backfilling. Piping, vault and conduit work will continue over the next few weeks. Neighbors close to the site may notice an increase in vibration during the excavation and backfilling.

Solids storage building and mechanical dewatering building - northeast of site

Architectural work has started on the solids storage building. The structure has been “tented” to allow architectural coatings to be applied in dry conditions. Brick veneer and pearl panels will be applied over the next month. A tent will also be placed around the mechanical dewatering building for architectural work including roof insulation, coatings and veneer placement.

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

Tours will resume in the new year, every two months on the fourth Thursday. The next tour will be held on Jan. 22, at 10 a.m. 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. No meeting on Dec. 16.

A meeting was held on Tuesday, Dec. 2. The next meeting will be held on 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 online under “past meetings and events.” There will be no meeting on Tuesday, Dec. 16.

For more information, please email, call the hotline at 503-697-6502.