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            _____    __   __     ___      ______  
    ___    |  ___||  \ \\/ //   / _ \\   /_   _// 
   /   ||  | ||__     \   //   / //\ \\    | ||   
  | [] ||  | ||__     / . \\  |  ___  ||  _| ||   
   \__ ||  |_____||  /_//\_\\ |_||  |_|| /__//    
    -|_||  `-----`   `-`  --` `-`   `-`  `--`     
     `-`

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Text this: Flow backup caused by structures within open channel