USGS Watersheds (HUC) — Alaska

Watershed boundaries (Hydrologic Unit Codes) from USGS. Drainage basins at multiple scales.

Why this data matters

Watersheds define drainage boundaries for water rights and permitting, baseline for environmental impact analysis.
Organizes hydrology data spatially.
Essential for understanding surface water flow and catchment areas.

Data source

Field	Value
Agency	U.S. Geological Survey
Coverage	Alaska

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