BLM OR Fish Anadromous Arc Hub: Anadromous Fish Presence in Streams

FISH_ANADROMOUS_ARC is a geospatial feature class from the Department of the Interior used to determine the presence of anadromous fish species in streams, affecting land management buffer widths. The data originates from the National Hydro Dataset (NHD) and the Aquatic Resources Information Management System (ARIMS), combining actual observations and modeled presence. It was last updated on 2026-04-14.

Use Cases

• Determine protection buffer widths for land management plans based on anadromous fish presence.
• Model habitat suitability for anadromous fish species based on observed and modeled data.
• Verify fish species presence in streams for conservation planning based on biologist verification methods.
• Integrate aquatic resource data into broader hydrographic datasets based on the NHD source.

Strengths

• Data is derived from the authoritative National Hydro Dataset (NHD).
• Includes verification from fish biologists or trained specialists where possible.
• Available in multiple formats including GeoJSON, CSV, and ArcGIS REST API.
• Has a clear public domain license (us-pd).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data collection methods varied by district, which may affect consistency.

Provenance

Source

Department of the Interior, Aquatic Resources Information Management System (ARIMS).

Collection Method

Data comes from the National Hydro Dataset (NHD), from actual observations or modeled fish presence.

Time Range

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Freshness

Last updated 2026-04-14 16:47:04.685948.

Geography

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