I have only just noticed this whilst leveling up my pally in this zone if I am flying or near the dam or the river as well the water level on certain viewing angles seems to just disappear in front of me if I then turn slightly it then refills the area as it should be. Also when going to the quest giver in the dam it also appears to be empty and "fills" itself as I walk down the passage inside of the dam. Is there an issue my end my machine is more than capable of running WoW on ultra settings without any problems and the water texture has never been an issue elsewhere and I have had no instances of water dissappering and refilling when I've moved my viewing angle the actual arc of the viewing angle is small when this bug or issue makes itself known to me and it seems to be only effecting my pally and no other charcters in the game have had this in any other zone to date nor has my pally experinced this outside of Uldum..

I would like some clarification if there is a known bug with the river and dam system there so I do not start to think that my machine has some kind of fault the spec is

i-7 2600k (liquid cooled running at stock speed)
16GB Ram
GTX 580 1536MB
Windows 7 Ultimate 64

Dunno if the above helps but if you want more info please ask.