Environmental Services is working on a project to repair deteriorating sewer pipes in the Vernon, Sabin, and Alameda neighborhoods. Sewers in these neighborhoods are between 90 to 100 years old.
This project will repair sewers in the public right-of-way and lateral pipes that connect individual properties to the public sewer in several neighborhoods north of Alameda Ridge (see map below). The city's contractor is using both open trench construction and cured-in-place pipe lining to repair sewers.
VSA North Schedule
- Construction hours are generally 7:00 a.m. to 6:00 p.m. Monday through Friday. The contractor may work the same hours on Saturday if needed.
Construction started in spring 2013 and will take about one year to complete.
Work is Ongoing (see map, below)
- Crews are preparing for CIPP lining (see below) to take place along NE Killingsworth at NE 24th, NE Mason at 25th, NE Alberta at 32nd Place, NE Mason at 32nd Place, and NE Mason at 31st during the first week of December.
Crews are finalizing work on NE Mason between NE 24th and 32nd place, and along NE 20th near Going and Wygant.
Crews will be pipe bursting (see below) on NE Dunkley at 24th starting the week of 12/9. Preparations on that block will take place the week of 12/2.
Crews will also be working along NE Skidmore at 32nd place, NE Mason at 31st, NE Going at 18th, NE Alberta at 32nd place, and NE 24th near Skidmore for a day or two in the next several weeks.
- Crews continue to do smaller repairs throughout the project area, and will repair any damaged curbs near the end of the project timeline.
- When crews are in a neighborhood for final paving and restoration, there may be some hard road closures and/or parking restrictions while the road surface is installed and allowed to harden. For example, crews will be repairing the concrete street on NE 31st at Alberta in the coming weeks, which will result in some temporary road closures.
Much of the work in this project is being done using an open-trench technique. Crews dig pits in the street, replace or repair aging or deteriorating pipe, and fill in the trench. Temporary paving covers the work area until permanent paving and final restoration is completed.
CIPP: The city’s contractor will also use a trenchless repair method called cured-in-place pipe-lining (CIPP) for some of the work. The CIPP process doesn’t require digging a trench and minimizes construction impacts. Work crews use manholes or other access points to insert a flexible liner inside the old pipe. Hot water or steam pumped into the sewer flattens the lining against the inside of the old pipe. The liner gradually hardens to form a rigid, smooth surface. Construction crews will access the pipe via several temporary construction easements along the project alignment.
You are likely to smell a chemical odor during the CIPP lining work. The odor is from a chemical called styrene in the resin liner installed inside the pipe. The odor dissipates quickly once installation is complete. The amount of airborne styrene the repair process produces is not a human health risk.
Pipe Bursting: Pipe bursting requires two pits and uses a bursting head that drags new sewer pipe through an existing deteriorated pipe. The whole operation can take a couple of weeks. The actual pipe-bursting is noisy but generally takes less than one day to complete.
What to Expect During Construction
- Construction will create noise, vibration and dust and disrupt normal neighborhood activity.
- Parking may be limited in and around the work zone.
- Traffic congestion in the area will increase and you may experience delays in getting to your destination.
- There may be periods of inactivity between construction phases.
- A city construction inspector will be on-site during work hours. If you have an immediate need during construction, the on-site inspector may be able to assist you.
- Let us know if you have concerns such as business operations, disability issues or medical or business deliveries.
For More Information
For information about the Vernon-Sabin-Alameda North Project, contact Becky Tillson at 503-823-2827. To receive occasional email updates about the project, email Becky Tillson with “VSA North” in the subject line.