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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

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The Tryon Watershed has much low-density residential in its upper reaches and on the tributaries. In the lower sections, however, lies the Tryon Creek State Natural Area, where the habitat is characterized as good. It has an intact forest canopy, high riparian integrity, and variable hydrology. The forest is mostly second growth and the instream habitat is complex.

The upper reaches of the stream are largely broken up by culverts which degrades habitat. Riparian area is limited due to development and instream complexity is low.

Tributaries include lower canyon (Nettle, Palatine Hill, Red Fox, Park and Fourth Avenue Creeks); Arnold Creek; upper tributaries (Burlingame and Quail Creeks), and Falling Creek.  Arnold Creek and Falling Creek are believed to significantly impact habitat and hydrologic functions in the Tryon Creek subbasin.