West Linn Pipeline Construction Update
Construction updates include all current or upcoming pipeline work for the project in West Linn.
- Horizontal directional drilling under the river, near Mary S. Young Park – pipe pullback starting soon
- Mary S. Young Park pathway improvements
- Highway 43 pipeline construction (night work) –starts next month
- Neighborhood Construction Meetings – first and third Tuesdays of the month
Horizontal Directional Drilling Under the River Near Mary S. Young Park
The pipe barge arrived Wenesday carrying 16 - 250 foot long strings of pipe. Starting today, these sections of pipe will be welded together into a continuous 3,800 foot long string, in preparation for pullback through the HDD tunnel. As each string of pipe is welded to the next, it will be fed into the river, eventually stretching back to the mouth of the Clackamas River. Pipe welding will occur 24 hours per day for the next week and a half, prior to pullback. There will be limited lighting on the barge while crews conduct welding operations and very little noise. The pipe and buoys are required to be lighted at night and boaters are urged to use caution near the buoys and pipe.
“Pullback” of the pipe is now scheduled for October 28 and is expected to take one to two days. A drill rig will pull the pipe through the hole under the river, from Meldrum Bar Park to Mary S. Young Park. During this phase, operations must occur round-the-clock in a continuous fashion, to ensure the hole remains open.
Neighbors on Mapleton Drive and near Mary S. Young Park may hear noise from the drilling site and notice an increase in truck traffic during the 24-hour pullback work. Trucks will be hauling soils and drilling mud off site day and night during the work. Crews will be able to reduce some night time truck traffic by using large storage tanks near the work site. Noise from the site is expected to be similar to the day-time drilling noise over the last two months.
Over the couple of weeks, prior to pullback, there will be some activity at the West Linn HDD site including drilling to pull a short, 36 inch “dummy” pipe through the tunnel (a test run) and bringing in drill pipe and tanks for storing soil, rock, and drilling mud.
Mary S. Young Park Pathway Improvements
Funds from the Lake Oswego Tigard Water Partnership have been used to pave portions of the main pathway through Mary S. Young Park. Last week volunteers were putting the finishing touches on the pathway by adding gravel to the shoulders.
Highway 43 Pipeline Construction (night work) – starts next month
Crews are expected to begin laying pipe on Highway 43 near Laurel Street in Lake Oswego in early November. This crew will progress south toward West Linn. A second crew is expected to begin pipeline construction in mid-November on Highway 43 near Mapleton Drive in West Linn, working north toward Lake Oswego. Schedules are subject to change.
Construction work hours were originally scheduled for weeknights but to increase safety and minimize impacts to businesses and traffic, work will now occur at night Sunday night to Friday morning between 8:00 p.m. and 5:00 a.m. In most areas on Highway 43, two way traffic will be maintained during construction hours. All travel lanes will be open during the day.
In addition, prior to pipe installation, the asphalt in the roadway where the pipe will be placed will be saw-cut. To help minimize noise impacts, this will occur during the day between 9:00 a.m. and 3:00 p.m., for short durations.
Neighborhood Construction Meetings – first and third Tuesdays of the month
A bi-monthly neighborhood construction update meeting was held on Tuesday, October 7, at Burgerville in West Linn. The next neighborhood construction meeting will be held on October 21, at 6:00 p.m. in the downstairs restaurant area at Burgerville, 18350 Willamette Drive in West Linn. Please come along to stay updated on construction progress in West Linn and ask questions of the project team.
During November, only one construction update meeting will be held on Tuesday, November 18 at 6:00 p.m. There will be no morning meeting on November 4.