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Red Alder Basal Area, by Stream Reach, for the Pacific Northwest

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: May 05, 2026 at 09:26 PM | Dataset Last Updated: November 17, 2020 at 12:00 AM
Red alder (Alnus rubra) are a common component of forests in Western Oregon and Washington. This file provides an estimate of red alder basal area in western Oregon and Washington for each incremental catchment of the USGS Pacific Northwest SPARROW model.

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