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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

Updated March 10, 2017

In the spring and early summer of 2017, 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 valves will help to ensure the sewer system operates safely and efficiently. Construction is anticipated to begin in May 2017 and last about two weeks at each location.


Alder Shaft

SE 3rd Avenue and Alder Street

Alder Trunk

SE 7th Avenue and Alder Street

Upshur Shaft

NW 11th Avenue and Northrup Street