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1221 SW 4th Ave, Suite 110, Portland, OR 97204

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SW Yamhill and Morrison between SW 1st-13th Sewer Project

SW Yamhill and Morrison Streets between SW 1st-13th Avenues Project

Proposed 24/7 Schedule for Urgent Sewer Repairs

Environmental Services is designing a project to repair about 6,500 feet of public sewer pipes in Downtown Portland that are 100 to 140 years old and in deteriorating condition. The sewer pipes are showing signs of cracks, breaks, holes, offset pipe connections, and root and grease obstructions, putting the pipes at risk of structural failure. The repairs will protect the public and the environment by reducing the possibility of sewage releases to buildings and streets.


Repairs will be made to pipes in SW Yamhill and SW Morrison Streets between SW 1st and SW 13th Avenues, plus a small segment on SW Stark Street at SW 1st Avenue. See the project map at


Sewer repairs will occur this spring from March 15 to May 20. The work coincides partly with TriMet’s next MAX improvement project in May. Coordination between the City and TriMet will lessen the burden on residents, businesses and visitors to downtown.


The city hopes to complete as much critical pipe repair work as possible in advance of and during the MAX improvement project. To condense several months of urgent repairs into the project timeline, the city is proposing to work all hours and all days.

Portland noise code allows construction from 7 a.m. to 6 p.m. Monday through Saturday. Work after 6 p.m. and before 7 a.m. and all hours on Sundays requires a noise variance from the Portland Noise Office. Because construction crews will work days and nights, including weekends, Environmental Services will apply for a Noise Variance.


To avoid digging up the streets and sidewalks for sewer repairs, the city will employ a process called Cured-in-Place-Pipe Lining (CIPP). This less disruptive process will strengthen and reinforce the pipes, making them last for many years. CIPP construction is considerably less noisy than open trench excavation. Equipment that generates noise will include sewer cleaning trucks, compressors, generators, ventilation fans, and other trucks and related equipment. Night work will require lighting of the area. See for details about CIPP.


  • Accessing sewer pipes through manholes will require temporary street closures of one-to-two-block segments on SW Yamhill and SW Morrison Streets.
  • Where needed, local access will be provided by flaggers.
  • Access to and from driveways may be delayed.
  • Staging areas for materials and construction vehicles will be on cross streets and will require some lane closures and parking removal.
  • Bypass pumping to maintain sewer service during construction may require temporary cross-street closures with local access provided by flaggers.


Your comments regarding the proposed 24/7 schedule are valuable and you can submit them to the Portland Noise Office by letter, email or telephone. Please submit your comments by March 1 to:

Portland Noise Office

1221 SW 4th Avenue, Suite 110

Portland, OR 97204


Phone: 503-823-7350


If you have questions or concerns, please call Cheryl Kuck at 503-823-7898 or email Include your name and property address in your email so we can provide you more details about what to expect in front of your property. Write “SW Yamhill-Morrison” in the subject line of your email.

Let us know if you have questions or concerns, such as maintaining driveway access, business operations, medical deliveries, and other impacts. Over the coming months, we plan on visiting businesses adjacent to the pipe repairs to discuss the project and address any concerns.


Businesses in the area between SW Alder to SW Taylor Streets and SW Naito Parkway to SW 13th Avenue are encouraged to complete the Downtown Business Sewer Questionnaire to help us understand your sewer connections, business operations and needs. We will use this information to plan the best possible project with the least disruption. Please visit to complete the survey.

Thank you for your participation and cooperation during this important sewer repair project. We will provide more specific information as the project evolves.


Cheryl Kuck

Community Outreach

City of Portland Environmental Services

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

Phone: 503-823-7898


Working for clean rivers

Over one-third of Portland's 2,500 miles of sewer pipes are more than 80 years old. Projects to replace or repair aging sewers are important for protecting water quality, public health and the environment. Learn more at

The City of Portland complies with all non-discrimination laws including Title VI (Civil Rights) and Title II (ADA). To request a translation, accommodation or additional information, please call 503-823-7740, or use City TTY 503-823-6868, or Oregon Relay Service: 711