Lake Oswego-Tigard water project reaches midway point
Construction is on schedule and on budget, officials say, with completion expected by summer 2016
The Lake Oswego Tigard Water Partnership, the $254 million project designed to upgrade and increase system capacity to deliver drinking water from the Clackamas River to Lake Oswego and Tigard, has reached the halfway mark on budget and on schedule.
Project director Joel Komarek said Tuesday that construction is underway on every component of the new water system, with completion now expected for the most part by summer 2016.
Komarek said recent milestones include the installation of a 3,900-foot pipe under the Willamette River, nearly five miles of pipe laid (47 percent of the total) and more than 330 cubic yards of concrete poured to complete the roof on the Waluga Reservoir 2. In addition, the River Intake Pump Station on the Clackamas River is scheduled for startup in February.
But while the overall program is on schedule, the timeline to expand and replace the water treatment plant in West Linn has been extended. (The new system will provide an emergency water supply to West Linn.) Slayden Construction Group (SCG), the general contractor in charge of building the water treatment plant, told officials last month that major construction activities will be complete by fall 2016, but that final completion now is not expected until early 2017.
"While we're happy that the majority of the project is on track, we're surprised and disappointed about the later completion date for the water treatment facility," Komarek said. "We understand an extended construction presence at the plant impacts our neighbors in West Linn, and we're fully committed to finding ways to minimize that."
SCG officials said they are working closely with the project's construction oversight team to look for ways to complete the work as quickly as possible, including working six days a week, subcontracting more work and installing temporary covers over buildings to allow interior work to occur prior to roof installation.
SCG expects final paving and restoration work on Mapleton Drive and Kenthorpe Way in West Linn to occur in late summer/fall 2016. Between fall 2016 and early 2017, most of the remaining work is expected to have minimal impact in terms of noise, vibration and construction traffic. In general, activities will include finishing electrical, mechanical and plumbing work; architectural finishes; landscaping and site cleanup; and start up and testing of the new ozone system.
At this stage, the Partnership does not anticipate any impact on water rates in Tigard or Lake Oswego, Komarek said.
The new water supply system will replace aging, vulnerable, at-capacity infrastructure with a state-of-the-art system designed to meet current seismic standards. The new system will enhance emergency water supply reliability regionally, Komarek said, by providing access to Lake Oswego's and Tigard's combined storage as well as other supply sources.