Thene, John R.Richard, Christopher A.Gulliver, John S.2011-08-192011-08-192001-12https://hdl.handle.net/11299/113355In October 1998, the San Antonio River Tunnel project experienced its largest flood to date. During that event the Removable Splitter Wall (RSW) vortex suppression device was damaged: The lower two panels apparently vibrated and broke due to fatigue. The RSW was comprised of nine 25-ft long, by 6-ft high and I1-in thick panels. Each panel was constructed of reinforced concrete with a C-channel framing the each edge. According to Corps of Engineers staff, structural engineers have determined that the failures, each at approximately the third points, were characteristic of a fatigue failure (Photo 1). From Photo 2 of the panels being lifted from the inlet shaft, the panels broke approximately 9 feet from the downstream end. The points of failure were also reported to coincide with the lifting holes for the panels.en-USReport