Friday - September 26, 2014

Water Treatment Plant Construction Update

Pipe installation near the center of the site (foreground) & walls being formed for the finished water pump station (background).

Ballasted flocculation – center of site

Large mechanical equipment deliveries are continuing to arrive and be installed for the ballasted flocculation. Over the next two weeks, water testing of two tanks in the south of the structure will begin.

Temporary storage building – southeast of site

Work continues on installing a temporary storage building on the southeast corner of the site (photo shown on the left). It will store large equipment arriving on site, to be installed later. The building will be removed near the end of the project.

Chemical & electrical buildings – center of site

Crews are forming and pouring the truck loading slabs for the chemical building. Starting next week, concrete blocks for the walls will be placed. Over the next two weeks, structural steel will be placed for the electrical building.

Finished Water Pump Station and Clearwell – south and center of site

Wall pours are now complete for the finished water pump station. Crews are installing piping support and next week, the exterior coating will be applied. Once this is complete, the area will be backfilled. During backfilling, neighbors close to the center of the site may experience an increase in vibration, as the compactor compresses fill. Over the next few weeks, crews will begin cleaning the clearwell tank and filling it for the water test.

Miscellaneous piping

Installation of the 30” – 48” piping across the site continues, including excavating, placing the pipe, encasing it in concrete and backfilling the trench. During the excavating and backfilling, neighbors may experience an increase in truck traffic, noise and vibration.

Work hours

Work hours are Monday to Friday from 7:00 a.m. to 7:00 p.m. and Saturdays, from 9:00 a.m. to 5:00 p.m. Please refer to the current site plan for locations of each structure.

WTP construction tours – next tour is October 16

Due to scheduling and holiday conflicts, October and December tours will be held on the third Thursday of the month at 10 a.m. (October 16 and December 18). Advance registration is required and space is limited. Please contact us to sign up for a tour!

Neighborhood construction meetings – first and third Tuesday of the month

The next meeting will be held on October 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 questions of the project team. All meeting materials are posted online under “past meetings and events.”

For more information, please email lotwater@ci.oswego.or.us, call the hotline at 503-697-6502.