ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
Model investigations were conducted to determine the adequacy of the designs of two gravity spillwaysSpillways A and B to be located on the Tennessee-Tombigbee Waterway. The investigations were primarily concerned with evaluation of the tendency for surging of flow on the spillway tainter gates, defining the discharge characteristics of the structures, and ensuring adequate stilling basin performance. The models indicated that basic features of the original design structures were unsatisfactory however, modifications that improved hydraulic performance were developed. There was no tendency for surging on the tainter gates. Discharge characteristics of both spillways for controlled and uncontrolled flows were determined. Divider walls were located in the stilling basins downstream of the piers to eliminate unsatisfactory flow conditions that occurred during single gate operations.