Environmental Services has designed this project to repair about 360 feet of concrete public sewer pipes in N Schmeer Road at the intersection of N Vancouver Avenue. The 41-year-old pipes and a manhole in the intersection are severely deteriorated from sanitary sewer flows. The project will line the pipes and install a corrosion-proof insert within the manhole. These improvements will help protect public health, water quality, and the Columbia Slough Watershed.
Construction will begin in December 2017 and is anticipated to be completed by the end of February 2018.
Construction will occur in phases. The manhole repair may take up to four weeks to complete. The sewer pipe repair may take a week to complete. Pavement restoration will occur after the repairs are completed.
In general, work will occur 7 a.m. to 6 p.m. Monday through Friday, and the same hours on Saturday if needed. The project will also require intermittent nighttime construction because of work in the middle of the busy intersection at N Schmeer Road and N Vancouver Avenue.
The Portland Noise Office granted Environmental Services a Noise Variance to enable the city's contractors to work all hours and all days as necessary to complete the work safely and to minimize traffic impacts to freight, commuters, cyclists and pedestrians, and eventgoers at various special event venues in the area.
To report concerns about nighttime construction noise, contact the Portland Noise Office at 503-823-7350 or email firstname.lastname@example.org.
To repair the manhole, crews will install a corrosion-proof insert within the existing manhole. This work will require a large excavation in the intersection of Schmeer Road and Vancouver Avenue. To repair the public sewer pipe, crews will employ a less disruptive process called Cured-in-Place-Pipe Lining (CIPP). Work crews access the sewer from manholes to insert a flexible liner inside the old pipe. Hot water, steam, or ultraviolet light inflates and cures the liner, which gradually hardens to form a rigid, smooth surface that seals cracks and restores the pipe to near-new condition.
People who live and work near a CIPP repair project can sometimes smell a chemical odor during the pipe-lining work. The odor is from the chemical styrene, which is in the resin liner installed inside the pipe. The odor dissipates quickly once the installation process is complete. The amount of airborne styrene produced by the lining process is not expected to cause health issues for workers or the public.
To learn more and view photos about sewer construction methods, click here.