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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

More Contact Info

Tryon Creek Outfall Repair

photo of Tryon Creek outfall in need of repairEnvironmental Services has completed construction of a new outfall pipe to carry stormwater runoff from 24 acres in southwest Portland and from portions of Interstate 5. The 36-inch concrete pipe collects runoff near SW 35th Drive close to Barbur Boulevard and the freeway and discharges stormwater to Falling Creek, a Tryon Creek tributary.

Over the years, erosion has undercut the pipe where it drains to the creek. This project replaced the outfall pipe, stabilized slopes around and below the pipe, and, in the coming months, will replant the area with native vegetation.

Re-vegetation Work

Re-vegetation staff are currently working on invasive species removal, and will be planting native species on about 1.5 acres within and outside of the work area this winter and next winter.

Thank you for your cooperation during this important project. Please feel free to be in touch with any questions or comments.

For More Information

With questions or for more information, please contact Becky Tillson at 503-823-2827 or