The Siuslaw Watershed Council has a wide variety of GIS and spatial data. We are in the process of putting this data online.
If you have data inquiries please direct them to monitoring (at) siuslaw dot org
Links to spatial data downloads (WGS84 Lat/Lon :: EPSG 4326):
Links to 2002 Watershed Assessment and data:
Links to spatial data services:
Online map viewer:
Other data sources include: