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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

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

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Air Pressure Reduction Project

In the fall of 2016, Environmental Services will install a valve and underground vault at three separate locations in the city to reduce the rare build-up of air pressure in the public sewer system that can occur during intense rainstorms. The valve will help to ensure the sewer system operates safely and efficiently.


Alder Shaft

SE 3rd Avenue and Alder Street

Alder Trunk

SE 7th Avenue and Alder Street

Upshur Shaft

NW 11th Avenue and Northrup Street