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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Ave, Suite 613, Portland, OR 97204

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North Mississippi Avenue Urgent Sewer Capacity Project

Updated July 17, 2020

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The City of Portland’s Bureau of Environmental Services is continuing our work to repair and replace critical sewer and stormwater infrastructure. Environmental Services will continue to provide information and updates on construction schedules and activities during the COVID-19 emergency.   

Environmental Services is postponing sewer capacity work on N Mississippi Avenue until after summer. This work was initially planned to take place this summer in order to take advantage of the light traffic and reduced business activity during the Governor’s COVID-19 Stay at Home order.  With Multnomah County now in Phase I reopening, we have heard feedback from the community that we should wait until after the summer to complete this work.

The urgent sewer project is located on N Mississippi Avenue between Shaver and Fremont and will replace and upsize over 1,000 linear feet of sewer pipe. The sewer main is over 100 years old and deteriorating due to age and is also too small for the area. The replacement and addition of new larger pipe will increase sewer capacity, reduce basement sewer backups and street flooding, and help protect public health and the environment.

North Mississippi Sewer Capacity Map

Construction Schedule

Construction is postponed until further notice. A specific start date for construction has not yet been determined. Construction hours and duration of construction will also be determined later and will be subject to any COVID-19 restrictions from the county or the state. We will provide regular updates on schedule and planned activities.

Safe Streets/Healthy Businesses

Portland Bureau of Transportation (PBOT) has launched a program called the Safe Streets Initiative. This program works with community organizations and businesses to make temporary changes to city streets to give people more space to walk, bike, roll, do business, and get around in their neighborhood. Many businesses along N Mississippi Avenue have started to apply for these temporary permits and Environmental Services is working closely with this group to minimize impacts to this historic business district.

More information about the Safe Streets Initiative can be found at

Before Sewer Construction 

Following the Water Bureau, and before sewer construction begins, you may see crews videotaping the conditions of the sewers, trimming street trees, dropping off construction materials and installing signs to prepare for the project. For more specific information on these activities, check the webpage at

Sewer Construction Methods 

There are two different methods of construction that will be used on this project. Open Trench and Pipe Bursting. Some sewer connections will be dug using a trenchless technology. More information on these methods can be found at   

What To Expect During Construction 

You can expect the following activities and impacts during construction:

  • Expect traffic delays in and near the work zone.
  • On-street parking will be temporarily removed in and near the work zone during work hours, which are 7am to 6pm (while the Stay at Home Order is in effect).
  • Equipment and materials may be stored on streets overnight.
  • Sewer, water, and other utilities are expected to remain in service during sewer construction.
  • Construction creates noise, vibration, and dust and may disrupt normal neighborhood activity.

For More Information 

We will be sending frequent email updates to keep you posted on the construction schedule, and activities, including possible traffic detours, delays, and parking restrictions. Please sign up now to receive updates by emailing  with “Mississippi” in the subject line or signing up at the link at the top of this webpage. If you have any questions or concerns about this project, don't hesitate to contact Joe by email or call 503-823-5753.

Business Questionnaire

Fill out a questionnaire about your business so we can minimize impacts to your business.

Historic Mississippi Business District

Find out what businesses on N. Mississippi are still doing business. Support Local.