POL Government Bureaus & Offices Environmental Services What We Do Watershed Management Portland's Watersheds Willamette Watershed Willamette Watershed Characterization Report  Willamette Subwatersheds   Conditions unique to each of the 27 Willamette subwatersheds
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The Swan Island subwatershed extends from the top of the bluff along N Willamette Boulevard to the Willamette Rive and includes the mostly industrial Swan Island. There are no stream channels in the subwatershed.
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