Previous Entries

Older entries are listed below. You may also browse articles by month.

 
Wednesday - February 8, 2017

Recent Cryptosporidium Detections in Portland Bull Run Water

The Portland Water Bureau recently detected the presence of Cryptosporidium, a potential pathogenic microorganism, in several samples collected at their Bull Run intake in January and February.

Although our water systems are close to Portland’s, the City of Lake Oswego and Tigard Water Service Area customers receive their drinking water from a different source and the treatment process is also different than Portland’s. Lake Oswego and Tigard Water Service Area’s primary water source is the Clackamas River. The recently upgraded filtration system at our water treatment plant removes Cryptosporidium and pathogens that may be detected in the Clackamas River water supply. Ozone, a powerful oxidant, also provides an additional treatment barrier to protect public health. 

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Friday - January 27, 2017

WR1 columns almost complete; roof deck starts soon

Waluga Reservoir 1 Roof Replacement Construction Update

Crane delivery and removal

On the morning of Tuesday, January 31, a very large (360-ton) crane will be delivered to the site using several large semi-trailer trucks. Due to site constraints, and to minimize traffic impacts during delivery, trucks will be staged near the I-5. Only one truck will enter the site on Carman Drive at a time, unload crane materials and then exit, before another truck then arrives to the site. Five trucks are expected to deliver parts for the crane.

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Tuesday - January 17, 2017

Canceled: Jan. 17 Neighborhood Construction Meeting

Due to weather, the January 17 neighborhood construction meeting in West Linn has been canceled.

The next meeting will be held on Tuesday, February 21 at 6 p.m. at the Robinwood Station, 3706 Cedar Oak Drive, West Linn.

Thursday - January 12, 2017

WR1 columns and footings more than halfway complete

Waluga Reservoir 1 Roof Replacement Construction Update

In December, the large crane lifted a smaller crane inside the tank. The small crane was used to remove the remaining shoring support, and is now working to form and pour the new footings and columns.

Concrete placement over halfway for footings and columns

Crews have poured about half of the WR1 columns and more than three-quarters of the footings! However, with the recent snow fall and freezing rain events, concrete plants have been shutdown which has slowed progress on the concrete placement. No pours are anticipated to occur for the remainder of this week. Crews are rescheduling as many concrete pours as possible for next week, weather permitting.

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Tuesday - January 10, 2017

Ozone equipment installation underway, testing begins soon

Water Treatment Plant Construction Update

Information about onsite work is outlined below. Please note, schedules are subject to change.

Ozone system - northeast of site

Work is progressing well on the new ozone system. Crews and electricians have been focused on installing new equipment and piping inside the structures (pictured above). The contractor and water treatment plant staff are gearing up to begin testing and commissioning the new state-of-the-art ozone system, which will be online in the coming months.

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