Friday - November 7, 2014

Water Treatment Plant Construction Update

An overview of the entire water treatment plant worksite

Utility work on Kenthorpe Way

To support the Lake Oswego-Tigard Water Partnership project, Portland General Electric (PGE) will perform work on Kenthorpe Way that may impact neighborhood traffic. Work is expected to begin mid-November and run through the end of the month. PGE will be providing the project partners with alternative electrical feed to the treatment plant to increase reliability to the facility.

The new lines will be installed underground, requiring PGE to access the right-of-way area along South Kenthorpe Way between Old River Road and the Lake Oswego Water Treatment Plant during the hours of 7 a.m. and 4:30 p.m. Flaggers will be present during construction hours to assist with traffic impacts. Once these facilities are installed, PGE will work with property owners and the City of West Linn to restore the shoulder to its previous condition.
If you have questions, please contact PGE’s Project Manager Chris Jewett at or 503-672-5481.

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

Concrete blocks for the walls continue to be constructed at the finished water pump station, and the clearwell is currently undergoing water testing.

Ballasted flocculation – center of site

Steel and decking are currently being installed for the top floor of this structure. A bridge is also being installed between the ballasted flocculation and the chemical building.
Solids storage and mechanical dewatering buildings – northeast of site

Structural trusses and roof systems are being installed, with the roof of the solids storage tank set to be installed next week.

Chemical & electrical buildings – center of site

This week, work began on the concrete blocks for the walls of the chemical building. This will continue over the next few weeks. Structural steel and decking is being placed for the electrical building.

Gravity Thickener – northeast of site

The floor of the gravity thickener is being grouted This facility thickens river sediments removed during the treatment process to be transferred to the solids storage tank.

Miscellaneous piping – center of site

Installation of 30–48 in. piping across the site continues, including excavating, placing the pipe, encasing it in concrete and backfilling the trench.

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.

Site plan and glossary

Please refer to the site plan for locations of each structure or our new 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. 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 – first and third Tuesday of the month

The next meeting will be held on Nov. 18 at 6 p.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.”

For more information, please contact us.