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Beaver dam locations in the Tualatin Basin, Oregon (ver. 2.0, November 2019)

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 06:11 AM | Dataset Last Updated: November 13, 2025 at 12:00 AM
This ArcGIS shapefile shows the known locations of beaver dams in the Tualatin Basin. The dam location information was generated by multiple local agencies, groups, and organizations. The local sources had identified the beaver dams between 2011 and 2019. USGS worked with these local sources to combine all data into one inventory.

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