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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

Inverness 20-inch Force Main Repair

Update for May 14, 2019:

The bicycle/pedestrian bridge is now open - 39 days ahead of schedule.

Update for March 6, 2019

The Inverness Force Main is an 11-mile pressure sewer that carries sewage from northeast Portland to the Columbia Boulevard Wastewater Treatment Plan. The 36-inch line splits into a 20-inch and a 30-inch pipe about two miles east of the plant. Both sections are suspended underneath the Columbia Slough Pedestrian Trail Bridge, which Environmental Services constructed. Repairs to the 30-inch pipe have been completed. Construction is about to begin to make repairs to the 20-inch pipe.

 Bike and Ped Detour Map

Bike and Pedestrian Bridge Closure

The Columbia Slough Bike/Pedestrian Trail Bridge, located north of the Columbia Boulevard Wastewater Treatment Plant, will be closed to make the sewer pipe repairs beneath the bridge. The closure will be 90 days beginning March 25, 2019. The bridge should reopen by June 23, 2019.

For More Information 

If you would like more information about the project or have questions and concerns you’d like to discuss, please call Debbie Caselton at 503-823-2831 or email at Please include “Inverness 20” in your voicemail or in the subject line of your email.