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StreamNet's Potential Fish Passage Barrier dataset captures both natural and man-made in stream features that have the potential to block fish passage (culverts, dams, debris jams, cascades, falls, etc.). Where information exists, fish passage ability is captured. This dataset is maintained and updated on an annual or semi-annual basis. The JUNE, 2012 publication dataset includes almost 60,000 features across the states of Washington, Oregon, Idaho, western Montana and California. Where possible, all barrier locations are georeferenced to StreamNet's regionally standardized routed hydrography layer (MSHv3) enabling comparison and analysis of barrier locations within the context of StreamNet's larger data holdings...

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