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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

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Air Pressure Reduction Project

Updated July 28, 2017

Construction Has Been Completed

This summer Environmental Services installed 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 began June 26 at the Alder Shaft location (SE 3rd Avenue and Alder Street), then moved to the Alder Trunk location (SE 7th Avenue and Yamhill Street) on July 10, and then moved to the Upshur Shaft location (NW 11th Avenue and Northrup Street) on July 18. Construction has been completed at all three locations.