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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

Stephens Creek Outfalls Repair Project

Design is nearly complete on an Environmental Services project to repair three outfall pipes that carry stormwater runoff to Stephens Creek (see map). The outfalls are deteriorated and contribute to erosion in Stephens Creek. The project will protect water quality and stream health, reduce erosion and rehabilitate riparian areas. The work will build upon previous projects along Stephens Creek, including habitat improvements at its confluence with the Willamette River.

Map of northern project area

Stephens Creek

Stephens Creek flows mainly above ground from its headwaters near Stephens Creek Nature Park to the Willamette River, just north of the Sellwood Bridge. The Stephens Creek subwatershed covers 754 acres of southwest Portland. The creek provides riparian habitat and stormwater conveyance in southwest Portland.

When it rains, stormwater runoff from streets and other hard surfaces flows into the creek. Outfall pipes convey stormwater and street runoff to the stream. This project will improve the function of the three outfalls on the map above.

Next Steps

Project construction is expected in summer 2017.

For More Information

With questions, comments or for more information, please contact Becky Tillson at 503-823-7097 or

Thank you for your interest in this important stormwater project.