Monday - August 31, 2015

New filters taking shape at the treatment plant

Crews begin excavating the first half of the basin

Water Treatment Plant Construction Update

Information about onsite work over the next few weeks includes:

Truck traffic route change reminder

While Mapleton Drive pipeline construction is underway, the WTP contractor will be using Kenthorpe Way to enter and exit the plant site. Neighbors on Kenthorpe Way should expect an increase in truck traffic during this time.

New filters – northwest of site

Crews continue pouring slabs for the new filters, and are now installing in-slab electrical conduit and plumbing. Last week, crews poured the first set of filter walls! Concrete work for the filters and administration buildings will progress over the next few months. As part of the concrete work, several trucks are arriving and departing the site. A few days after each pour, the edges of the newly-poured concrete slabs or walls are waterblasted or sandblasted. Neighbors close to the site on Mapleton Drive and Kenthorpe Way may experience an increase in intermittent noise during this activity.

New administration building – north of site

Major structural work continues for the new administration building. Rebar is being installed for the slabs and walls, prior to concrete being poured. Crews are also installing underground utilities (electrical conduit and plumbing). Soon, a large delivery of structural steel will arrive to the site, which will be used for the administration building and filters.

Washwater recovery basin – northwest of site

Work is underway on the washwater recovery basin, which is being constructed next to the new filters. The basin will process the water and sediment that is removed from the filters. Afterwards, the water will be recycled back into the treatment process.

Last week, the first phase of excavation started for the basin (pictured above). This has resulted in an increase in two-way truck traffic on Kenthorpe Way. Beginning this week, crews will install “soldier piles” as part of a shoring system, using a vibratory method. This is expected to take about two days to complete and will create some vibration and noise, depending on conditions and neighbor locations. Crews will then drill auger cast piles for the first half of the basin. Once this is done, this series of activities—excavation, soldier piles, auger cast pile drilling—will repeat for the second half of the basin. These activities are expected to continue over the next month. During this work, neighbors located close to the site should expect an increase in vibration and noise. Neighbors on Kenthorpe Way will also experience an increase in two-way truck traffic.

Neighborhood construction meetings – next meeting Sep. 1 at 7:30 a.m.

The next neighborhood construction meeting will be held at Burgerville on Tuesday, Sep. 1 at 7:30 a.m. Please attend to stay up-to-date on construction progress in West Linn and ask the project team questions.

Meeting schedule:
• The first Tuesday of the month at 7:30 a.m., at Burgerville, 18350 Willamette Drive, West Linn.
• The third Tuesday of the month at 6 p.m., at the Robinwood Station, 3706 Cedar Oak Drive, West Linn.

WTP construction tours

The next tour will be held on Sept. 24 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.

Work hours

Work hours are 7 a.m. to 7 p.m., Monday to Friday, and 9 a.m. to 5 p.m. on Saturdays.

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.

For more information, please email us, call the hotline at  503-697-6502, attend a neighborhood construction meeting.