Results are presented for an experimental study of round buoyant jets discharged horizontally into and at right angles to the direction of flow of an unstratified receiving stream. Objectives were to obtain empirical relationships defining the trajectory and near field temperature distribution of such jets. Experimental results are given in the form of dimensionless jet trajectories and centerline temperature elevation above that of the receiving fluid. Experimental data were obtained for jet densimetric Froude numbers. Velocity ratios and Froude numbers tested span ranges commonly encountered in outfall designs. Experimental parameters, including boundary conditions with the jet being discharged from a circular outfall located close to the bottom of the receiving channel, were intended to be representative of simplified approximations of a single-outfall cooling water discharge from a thermal plant located on a river.