Thursday - July 10, 2014

Gladstone Pipeline and River Intake Construction Update

Steel sheets that formed the in-water cofferdam have been removed from around  the RIPS structure and are being loaded onto trucks for removal from the work site.

Steel sheets that formed the in-water cofferdam have been removed from around the RIPS structure and are being loaded onto trucks for removal from the work site.

The new steel casing is being welded at Meldrum Bar Park. Casing installation resumed today.

The new steel casing is being welded at Meldrum Bar Park. Casing installation resumed today.

This update includes construction work in the following areas. Scroll down for specific information on each location:

  • River intake pump station (RIPS) on the Clackamas River
  • Pipelines east of McLoughlin Blvd. (W. Clackamas Blvd., Bellevue Ave. and
    W. Exeter St.)
  • Pipelines in Meldrum Bar Park
  • Horizontal directional drilling under the river in Meldrum Bar Park 

River Intake Pump Station (RIPS) – Cofferdam removal underway; river channelization starting soon

The remainder of the cofferdam will be removed and hauled away by the end of next week. Thank you to neighbors for your patience during this sometimes noisy activity. Concrete will be poured on Monday, July 14 (5 or 6 trucks) for the 68.5’ level deck. Throughout the rest of the month, crews will be working on forming for the permanent access bridge and installing rebar and the discharge pipe. Concrete for the bridge deck will be poured early next month.

A new activity, river channelization, will begin the week of July 21. Channelization of the river upstream from the RIPS is required by the Partnership’s environmental permit. Channelization involves removing rock and soil from the area upstream of the RIPS structure to increase flows past the RIPS to protect fish. Creating faster flows, especially during summertime higher water use, helps fish move away from the intake, ensuring their safety. Channelization is one of several fish friendly requirements that are part of the RIPS design.

Channelization is expected to last about five weeks. Excavators near the river will scrape rock and soil from the area and load it into a bucket that the large red crane will lift and deposit at the staging area above. The most visible change in activity for neighbors will be about 5 dump trucks per day arriving and leaving the site with loads of rock and soil. The area will be fenced, but river users nearby should stay clear of the area as it will be an active work site. Work hours are 7 a.m. to 6 p.m. Monday to Saturday.

Pipeline on W. Clackamas Blvd., Bellevue Ave. and W. Exeter St. – sanitary sewer relocations

Utility investigations are now complete. Starting next week, some sanitary sewer services along W. Clackamas Blvd. and Exeter Street will be relocated. Crews will contact any affected neighbors prior to the relocation. Neighbors will be asked to try to reduce their water usage during the time of the relocation. There may be some single lane closures with flaggers during work hours.

Pipeline installation is expected to start on W. Clackamas Blvd. in early August. In preparation for pipe installation, starting the week of July 28, crews will be saw cutting asphalt along:

  • W. Clackamas between Portland Avenue and Bellevue;
  • Bellevue between W. Clackamas and Exeter; and
  • Exeter between Bellevue and the westerly end of Exeter.

Pipeline in Meldrum Bar Park – utility locates and staging area change

Starting the week of July 21, utility locates will be occurring along the pipeline route between the Jensen Rd. pathway and the River in Meldrum Bar Park. Locating utilities ensures that the pipeline excavation avoids interrupting any existing service lines. Park users can expect to see a vacuum truck and excavator along the route. The vacuum truck, which removes soils to reach utilities, can be noisy. Please watch for flaggers along the roadway.

The contractor staging area north of Meldrum Bar Park Road will be shifting slightly to the east so that it does not interfere with the City of Gladstone’s recycling area to the west. Expect to see the same equipment and materials, but in a slightly more easterly location.

HDD pipeline under the river in Meldrum Bar Park – casing installation continues

Casing installation has been quiet for the past week and a half. Crews retooled to use a smaller casing as the larger one was stopped by boulders. Casing installation resumed today and will continue until solid rock is encountered. The casing is being installed by a pressurized hammer and is very noisy for anywhere between 1 to 3 hour periods during work hours, depending on neighbor locations and conditions. Following each hammering period, there are a couple of hours of cleaning or welding, which is not as noisy. Due to ground conditions, this work is expected to take another two weeks to complete. Work hours in Gladstone are 7 a.m. to 6 p.m., Monday to Friday and some Saturdays.

Neighbors may notice an increase in noise and truck traffic during construction. Work hours are 7 a.m. to 6 p.m. Monday through Friday. At times there may be some work occurring on Saturdays.

We apologize for the inconvenience this work may cause and thank you for your patience as construction progresses.

For more information, please visit the “all work underway” map, email lotwater@ci.oswego.or.us, call the hotline at 503-697-6502.