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).