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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 June 22, 2017

This summer 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 will begin June 26 at the Alder Shaft location (SE 3rd Avenue and Alder Street), then move to the Alder Trunk location (SE 7th Avenue and Yamhill Street), and then move to the Upshur Shaft location (NW 11th Avenue and Northrup Street). Construction will take up to three weeks at each location.