I tried to find a source for your claim but the best I could find was a study that said that future PLCs attacks could include targets like dams. The stuxnet t

I tried to find a source for your claim but the best I could find was a study that said that future PLCs attacks could include targets like dams. The stuxnet targeted parameters was Siemens S7-300, connected with a Vacon or Fararo Paya PLC, spinning between 807 Hz and 1,210 Hz. It then periodically modified the frequency to 1,410 Hz and then to 2 Hz and then to 1,064 Hz. What specific dam had their control flow gates jammed because of this? Please provide name, date and optionally a link.