BLM OR Fish Anadromous Polygon Hub: Anadromous Fish Presence in NHD Waterbodies

FISH_ANADROMOUS_POLY is a geospatial dataset from the U.S. Department of the Interior documenting the presence or absence of anadromous fish within National Hydrography Dataset (NHD) waterbody features. The dataset is hosted on Data.gov and was last updated on 2026-04-14. It is available in multiple formats including GeoJSON, CSV, and ArcGIS REST API.

Use Cases

• Modeling anadromous fish habitat suitability based on presence/absence data.
• Assessing watershed health and connectivity for migratory species.
• Informing land-use and water resource management decisions based on fish distribution.
• Creating maps for environmental impact reports based on species presence.

Strengths

• Published by the authoritative U.S. Department of the Interior.
• Available in multiple interoperable formats including GeoJSON and ArcGIS REST API.
• Last updated date is explicitly provided: 2026-04-14.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and spatial extent are unknown, which may limit suitability assessment.

Provenance

Source

U.S. Department of the Interior, Bureau of Land Management (inferred from title).

Collection Method

Likely compiled from field surveys and agency records.

Time Range

null

Freshness

Last updated 2026-04-14 16:46:51.746317; freshness should be verified.

Geography

Likely covers areas managed by the Bureau of Land Management, potentially Oregon (inferred from 'OR' in title).