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Associated Agencies

U.S. Department of the Interior (DOI) Bureau of Reclamation 

HydroData is the U.S. Bureau of Reclamation’s hydrologic database access portal. Through interactive maps and charts, users can view:

  • Reservoir data (including storage, inflow, releases, elevation, and more)
  • Gage data (flow, flow volume, and side inflows)
  • Basin maps (including current reservoir capacity and current and historical snow and precipitation charts).