Headwater Stream Barriers in Western Oregon

Publisher: USGS | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL

fresc.usgs.gov — This dataset is an ArcInfo point coverage depicting obstacles to anadromous fish migration in western Oregon. Data were compiled by fourth-field hydrologic unit code (HUC) from the Oregon Department of Fish and Wildlife StreamNet Database and from reports by fisheries biologists in various management agencies. Both natural and constructed (e.g., More... This dataset is an ArcInfo point coverage depicting obstacles to anadromous fish migration in western Oregon. Data were compiled by fourth-field hydrologic unit code (HUC) from the Oregon Department of Fish and Wildlife StreamNet Database and from reports by fisheries biologists in various management agencies. Both natural and constructed (e.g., culverts) barriers are represented in this database. This database was primarily developed to identify third-order sub-basins above geologic barriers to anadromy, where resident coastal cutthroat trout (Oncorhynchus clarkii clarkii) are the only salmonid present. In many cases, the barriers shown are the current extent of anadromy; however in some cases barriers to anadromy may exist downstream of those listed. Less...