exactly, that was their way when I were there, to simply keep replacing the gravel that washed into the cut below the lock where you need to pull the boat in. Unbelievable.
But, in their favour I must say they were working their way up the locks and putting some lovely cobbles/bricks down instead and it seemed to do the job at the time.
Mind this is now coming up to 5 years ago when they started at the lock above the Guillotine lock.
(Got to know a couple of the guys when I was drinking in the Silent woman 🤪)