Willamette Subwatersheds

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Portland's Watersheds

Willamette Watershed

Willamette Watershed Characterization Report

Willamette Subwatersheds

Conditions unique to each of the 27 Willamette subwatersheds

Willamette River North Segment

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The North Segment begins at the confluence of the Columbia and Willamette Rivers and extends upstream (south) 6 miles to the St. Johns Bridge. A portion of the Multnomah Channel, which runs along the south edge of Sauvie Island and joins the Columbia farther downstream, is included in this river segment. A portion of Portland's working harbor is in the North Segment.