Gladstone Pipeline and River Intake Construction Update
This update includes construction work in the following areas:
- River Intake Pump Station (RIPS)
- Gladstone pipeline work
- Horizontal directional drilling (HDD) under the Willamette River in Meldrum Bar Park
River Intake Pump Station (RIPS)
Plumbing and electrical work continue within the new structure. Crews will also continue to assemble wall panels in preparation for the roof installation, and glass will begin to be installed into doors and windows beginning next week. Large fish screens will arrive in early November. The new fish screens, along with the recently completed river channelization, will make this river intake much more “fish friendly” than the existing intake. Some of the onsite construction trailers will be moved next week in preparation for the road work at the intersection of Portland Avenue and Clackamas Boulevard.
Gladstone pipeline work
This week, crews have laid pipe along Exeter Street. Starting next week, this crew will temporarily move to Portland Avenue and Clackamas Boulevard to install a pipeline crossing. This work will involve a large excavation at the intersection, and Portland Avenue between Arlington Street to Clackamas Boulevard will be closed to through traffic while this work is occurring. Access to the river intake work site will be maintained. The crossing work is expected to take at least three weeks to complete. Please watch for signage directing you safely around all pipeline work as there is no pedestrian or bike access during construction.
Some key information about construction:
- Traffic detours and temporary closures will be in place, usually one block at a time.
- Equipment and material (e.g., gravel, pipe, etc.) will be stored and parked in the right-of-way.
- There will be no on-street parking in the one block closure zone during construction.
- Expect truck traffic and construction noise during construction.
- Work hours are 7 a.m. to 6 p.m., Monday through Saturday.
Pipe pullback under the Willamette has been completed!
On Oct. 28, “pullback” of the pipe was done between about noon and midnight. It was a long day, but the work was completed in just 12 hours, much faster than anticipated. A total of four barge mounted cranes and two land based cranes were needed to loft the pipe at the correct angle for insertion into the tunnel that had been drilled under the river over the past two months. Over a dozen tanker trucks removed drilling mud during the process from both the Meldrum Bar Park work site and the Mapleton work site in West Linn. On the Meldrum side, equipment and drill pipe are being removed and the end of the pipe will be cut off, capped and buried. In early 2015, the HDD pipe will be connected to the pipeline that will be installed in Meldrum Bar Park.