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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

SW Stephenson Roadside Swales

A newly-planted swaleEnvironmental Services is designing improvements to about 2,760 feet of ditches along SW Stephenson Street between SW 45th and SW 47th avenues. Work will begin in summer 2015 at several project sites.

Ditches on SW Stephenson carry stormwater runoff from the street directly to Fanno Creek and its tributaries. The fast-moving water causes erosion and carries pollutants washed off streets.

This project will convert ditches to roadside swales by planting them with a combination of grasses and low-growing plants to help protect the channel from erosion. The work will also include:

  • Constructing two green street planters to reduce stormwater pollutants and protect water quality in Oak, Arnold and Tryon creeks
  • Adding four-foot wide, paved walkways for pedestrians

Environmental Services is working with citizens and neighborhood groups on project plans including impacts to trees in the project areas.

The Fanno-Tryon Watershed Management Plan identified these improvements as a way to improve drainage and pedestrian safety and protect water quality. Over one-third of the roads in the watershed are paved and have no curbs. Ditches border most of them.

For More Information

Contact Lisa Moscinski at 503-823-3663.