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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

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Topography

Slopes greater than 20 percent predominate west of St. Helens road. The terrace along the river is generally flat.

AVERAGE ELEVATION MAXIMUM ELEVATION
MINIMUM ELEVATION   
667.0 1065.0 10.0
667 1065 10
Maps & Files

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