Juvenile Chinook salmon were tagged with acoustic transmitters and tracked by a hydrophone array at a tidal river junction. Processed location data is compiled into tracks after quality assurance, and merged with hydrodynamic data derived from a three-dimensional hydrodynamic model. The data collection includes processed tracks with colocated hydrodynamic velocity data, observed hydrodynamic velocity at select lateral transects, and modeled hydrodynamic velocity at matching transects.