Adaptive Hydraulics Model The purpose of the study was to determine flow velocities and patterns downstream of the dam during high spillway flows. Such flows may cause bank erosion downstream of the stilling basin under existing conditions. For this reason, some type of bank protection will be necessary. This study provides water-surface elevations, velocity data, and flow patterns for flows varying from 8,900 cfs to the Probable Maximum flood of 207,000 cfs. District engineers will use the information gathered from this study to design bank protection below the dam. More information can be obtained in ERDC/CHL TR-09-17.