Thursday - April 9, 2015

Yellow tower crane to be removed from the WTP site

Yellow tower crane.

Siding panels.

Water Treatment Plant Construction Update

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

New administration building – north of site

The contractor continues to remove landscaping on the north side of the existing plant parking lot, and is laying gravel for a temporary parking lot for plant staff. Next week, crews expect to begin excavating the foundation for the new administration building, which will be built in the footprint of the existing plant parking lot. Once excavation is complete, auger cast piles will be installed to support the foundation. Neighbors close to site on Kenthorpe Way may notice an increase in noise or potential vibration during this work.

Yellow tower crane – east of site

Mid-next week, a large crane is expected to arrive on site, which will be used to take down the yellow tower crane. Several flatbed trucks will be traveling to and from the site late next week to remove sections of the crane. The red tower crane will remain to service the major work set to occur in the center and west of the site.

Miscellaneous piping work – east of site

Most of the finished water pipe is installed, encased and backfilled. Crews are working to install some small joints and pieces at the end section of the pipe, which also requires some backfilling. 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

The pumps are currently being installed and electrical work continues within the structure. Final roofing is expected to be placed over the next few weeks, although this is weather dependent. Neighbors close to the site may notice noise from the scissor lifts operating within the structures.

Chemical & electrical buildings – center of site

Chemical piping systems are now installed in the chemical building. Work is progressing on the HVAC system, fire sprinklers and siding panels (pictured right). Mechanical and electrical checkout and startup of chemical equipment has begun and will continue over the next month.

Crews are placing the siding panels, roll up doors, and some interior coating on the electrical building.

Ballasted flocculation – center of site

Siding panels are being installed. Startup preparation has commenced. Once the structure is online, the existing sedimentation basins will be demolished. Demolition is expected to begin in mid-late May.

New meeting location and frequency - neighborhood construction meetings

The next meeting will be April 21, at 6 p.m. This will be the final meeting held 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.”

Starting in May, the neighborhood meetings will be held once a month, at the Robinwood Station, 3706 Cedaroak Drive, West Linn. Meetings will be held on the third Tuesday of the month at 6 p.m.

The May 19 meeting will be a special “Meet the Mapleton Drive pipeline contractor” session, from 7 – 9 p.m. at the Robinwood Station.

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.

For more information, please contact us or attend a neighborhood construction meeting.