I would assume it was entirely by accident, but for some reason, it would appear that Claudia has destroyed everything that can be destroyed by water on y levels 65 - 69 in areas of my city
Examples of this can be seen by
- the complete lack of tall grass outside my town hall, (6054, 68, -5196)
- missing redstone under stadium (5931, 69, -5104)
- vines cut off at the top under outside of town hall ( 6051, 63, -5194)
- disused rails cut off (6155 68 -5216) (you can see that the rails are only missing on those y values).