Gladstone Pipeline and River Intake Construction Update
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.)
- Horizontal directional drilling under the river in Meldrum Bar Park
- Gladstone tree removal completed at boat ramp parking area in Meldrum Bar Park
River Intake Pump Station (RIPS)
The final concrete pour for the walls at the 67 foot level occurred on Thursday, June 26. The access bridge girders have arrived and will be installed later this week.
Noisy activity! Some of the steel sheets on the land side of the cofferdam were removed this week. Crews (and neighbors) were happy that the crane could pull most of them out. The vibratory hammer was needed on only 4 sheets, for less than a minute each, keeping things quieter than they were during sheet installation.
July 1 starts the In-Water-Work Period (IWWP). The IWWP extends from July 1 through September 15, 2014 and allows work to proceed in areas below ordinary high water. This includes removing the rest of the sheet piles, girders and piles for the remainder of the cofferdam and the channelization work that will happen in the upstream rocky area. Removal of the remainder of the cofferdam is expected to take about two weeks. Neighbors may notice an increase in noise and vibration during this work, depending on locations.
Pipeline on W. Clackamas Blvd., Bellevue Ave. and W. Exeter St. – utility investigations
Survey work is complete along this portion of the pipe alignment. Utility investigations are continuing through early July as well as some sewer service relocations along W. Clackamas Blvd. and Exeter Street. Work hours are 7 a.m. to 6 p.m. Monday to Friday. There will be no work on the Fourth of July weekend. There may be some single lane closures with flaggers during work hours.
HDD pipeline under the river in Meldrum Bar Park – casing installation
Casing installation has been underway for about a week and a half. Crews are running into many cobbles and boulders as they install about 400 feet of steel pipe casing, prior to drilling the tunnel under the river.
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. There will be no work on the Fourth of July weekend.
City of Gladstone tree removal in Meldrum Bar boat ramp parking area complete
Gladstone Public Works removed several hazardous cottonwood trees near the boat ramp parking area on June 25. For more information, contact the City of Gladstone at 503-656-5225.
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.