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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 Hamilton Roadside Swales

SW Hamilton project map

 

Environmental Services is designing improvements to about 920 feet of ditches along SW Hamilton Street between SW 45th and SW 47th avenues. Work will begin in spring or summer 2015.

Ditches on SW Hamilton 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.

cross section diagram of planted swaleThis project will plant swales with a combination of grasses and low-growing plants. The vegetation will help protect the channel from erosion and may help reduce stormwater pollutants. As part of the project, the Portland Bureau of Transportation will add four-foot wide, paved shoulders.

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.