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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

MAILING ADDRESS: 1120 SW 5th Ave, Room 1000, Portland, OR 97204

More Contact Info

Project Overview

Environmental Services is designing a project to repair 10,765 feet, or two miles, of aging public sewer pipes in downtown Portland. The existing pipes were built between 1867 and 1927. Having provided 100 to 150 years of service, the pipes are showing signs of cracks, breaks, holes, offset connections, and root and grease obstructions. Upgrading the pipes will ensure that they provide safe and reliable sewer service and reduce the possibility of basement flooding and sewage releases to downtown buildings and streets.

This project is part of the larger Downtown-Old Town Sewer Repair Program managed by Environmental Services to assess the condition of and repair the public sewer system serving Downtown and Old Town Portland. The program represents millions of dollars in investments. Ultimately, these improvements will extend the life cycle of downtown sewer infrastructure by more than 50 years.


The project boundary is in SW Main, SW Salmon, and SW Taylor streets between SW Naito Parkway and SW 13th Avenue.

Project Map

The bold lines on the map below indicate proposed pipe work locations. All pipes are located within the public right-of-way. The map also shows where the pipes are located in relation to the center of the street. For example, on SW Taylor Street between SW 11th and 12th avenues, one pipe is north of the center line and another pipe is south of center.

Locations labeled "sewer extensions" are proposed additions to the public sewer system to enable adjacent property owners to directly and independently connect their private sewer line to the public sewer.

Project Map


Project design will continue through March 2021. Construction is anticipated to begin in June 2021 and take about a year to complete.

Downtown Open for Business

The Central Business District is the site of multiple projects to repair and replace aging sewers, rail lines, bridge structures, streets, and other infrastructure. Projects with long-term benefits will cause short-term disruptions to residents, businesses, and visitors. Environmental Services coordinates with multiple agencies to schedule and complete construction, minimize disruptions, and help people get to where they are going. For information about other projects that will affect travel in and around the Central Business District, visit

To avoid circling around construction to find parking, please use SmartPark garages. The nearest SmartPark garages are illustrated on the project map above.