Friday - March 27, 2015

Startup of solids removal structures underway at the WTP

“Cake” or dry soil from the screw presses.

Water Treatment Plant Construction Update

Work occurring on the new structures and across the site includes:

Yellow tower crane – east of site

In mid-April, the yellow tower crane is expected to be removed from the site! The red tower crane will remain to service the major work set to occur in the center and west of the site.

Solids storage building, mechanical dewatering building and gravity thickener – northeast of site

The startup and commissioning of these three structures is underway, which all play a role in the solids removal process. Solids consist of soil or sediments from the river.

Last week, WTP operations staff started making “cake” or dry soil from the screw presses in the mechanical dewatering structure. Screw presses remove the remaining water from the solids.

New administration building – north of site

Last week, the contractor began removing some of the landscaping on the north side of the existing plant parking lot to prepare for the foundation of the new administration building which will be built within the footprint of the existing parking lot. Over the next few weeks, they will continue this work and begin laying down gravel to create a temporary parking lot for plant staff. Neighbors close to site on Kenthorpe Way may notice an increase in noise or potential vibration during this work.

Miscellaneous piping work – east of site

The 48-in. finished water pipe is now installed on the east of the site. This week the pipe was encased in concrete. Over the next week, the area where the pipe was placed will be backfilled. Neighbors close to the site on Mapleton Drive may notice an increase in noise or potential vibration during this work.

Finished water pump station – center of site

Crews have finished installing the roof drain piping and chemical piping inside the structure. This week the pumps will arrived on site and will soon be installed inside the station. Once the pumps are installed, electrical work will begin within the structure. Neighbors close to the site may notice noise from the scissor lifts operating within the structures.

Chemical & electrical buildings – center of site

This week, chemical piping systems and fire sprinklers were installed in the chemical building. Work is progressing on the HVAC system and siding panels.

Solar panels were installed on the roof of the electrical building this week. Over the next few weeks, crews will continue installing the siding panels and roll up doors.

Ballasted flocculation – center of site

Crews are framing temporary walls on the western end of the structure. Work continues on the roofing insulation and roof panels. Plumbing and chemical piping continues to be installed within the structure.

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 glossary of terms for construction and operation of the WTP.

Neighborhood construction meetings – next meeting is April 7

The next meeting will be April 7, 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 the project team questions. All meeting materials are posted online under “past meetings and events.

For more information, please contact us or attend a bi-monthly meeting at Burgerville.