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COVID-19 Risk Level for Multnomah County: High Risk

N Delaware Sewer Project

Construction type
Sewer and Stormwater
Project status
Active

Environmental Services is constructing a project to repair 623 feet of deteriorating brick sewer pipe under North Delaware Avenue between North Buffalo Street and North Lombard Street. The project also includes a small section of sewer pipe under North Rosa Parks Way at North Delaware Avenue.

Sewer construction will resume in late February or early March 2021. Work is expected to take five (5) to ten (10) days to complete and includes night work.

Project Area

The map below illustrates where construction will occur on North Delaware Avenue between North Buffalo Street and North Lombard Street, and a small section of sewer pipe under North Rosa Parks Way at North Delaware Avenue. 

What's Happening Now

Crews have completed installing cleanouts, repairing public lateral sewer connections, and installing one large manhole. Remaining work includes concrete restoration around the new manhole, repair to the public main sewer pipe to take place at night, and quality control inspections.  

Rain and subcontractor availability will postpone main sewer pipe repairs using Cure-in-Place-Pipe Lining (CIPP) until late February or early March 2021. Completing repairs in this location requires working during dry weather when flows in the sewer are relatively low.  

Residents next to construction will be notified when mainline repairs are rescheduled. Remaining work is expected to take five to ten days to complete, includes night work, and may occur in phases.

We Want to Hear from You

Please let us know if you have a concern or question about a pipe repair near you. Be sure to include your name, property address, and project name (N Delaware Sewer Project) in your voicemail and email so we can provide you more details about what to expect in front of your property. Also, please write “Delaware” in the subject line of your email.  

Sewer Emergency: In the event of a sewer backup or basement flooding, call the Maintenance hotline immediately at 503-823-1700. It is staffed all hours and all days, 24/7.

Construction Methods

Cured-in-Place Pipe Lining (CIPP)

The pipe lining process involves inserting a flexible liner inside the old pipe, inflating the liner, and exposing it to heat or ultraviolet light to "cure" and harden the liner inside the pipe.  

You may smell an odor like plastic or glue during CIPP that will dissipate quickly once the process is complete. The odor is from chemicals in the liner resin. The amounts detected by an independent industrial hygienist are below health risk levels.  

To keep the resin odors from entering your home or business through your private sewer, fill any floor drains and infrequently used sinks with a small amount of water. This water will collect in the bend in the drain and block odors from the sewer.

Night Work Required for CIPP

Most work will occur from 7 a.m. to 6 p.m. Monday through Friday, and the same hours on Saturday if needed. Crews will also need to work three (3) nightshifts to complete main sewer pipe repairs using CIPP. Due to the large diameter of the pipe being repaired, the pipe lining process will take about 16 hours or more to complete. This will require working from morning into the evening and possibly overnight. Lining reduces the amount of digging needed to repair the public sewer and will reduce the overall construction duration by several weeks.

What to Expect

You can expect the following activities and impacts during construction: 

A Safe Work Site: We want you to be safe around the work site. Please keep children, pets, bikes, cars, and trucks away from the tools, machines, supplies, and construction workers. 

Noise, Vibration, and Dust: Construction creates noise, vibration, and dust and disrupts normal neighborhood activity. 

Traffic Delays: The work will slow down traffic in your neighborhood. Please read the traffic signs and follow directions from the workers with flags. 

Access to Your Home or Business: You will be able to go to your home or business, but you may not be able to park as close as you would like. We will try to make sure driveways and parking lot entrances stay open. Crew members can help you safely enter or exit your driveway or business parking lot.   

Parking Restrictions: We want you to be safe, so you might not be able to park your car next to work spaces, equipment, or materials. If crews are working directly in front of your home or a business, you may need to park in another place. 

Equipment Storage: Sometimes we will leave tools, machines, and supplies on your street overnight.  

Maintained Service: You can still use sewer, water, and other services while we work on your street. 

Work Hours: Most work will occur from 7 a.m. to 6 p.m. Monday through Friday, and the same hours on Saturday if needed. Crews will also need to work three nightshifts to complete main sewer pipe repairs using CIPP. 

Schedule Changes and Inactivity: Work schedules can change for many reasons like weather, traffic, and problems with tools, machines, or supplies. Sometimes we need to stop between different types of work and start again later.

Sign Up for Updates

Sign up updates at N Delaware Sewer Project