I loaded my entire load order into TES4Edit and that did not identify any conflicting mods which were editing cells 19,7 or 20,7. Conflicts in neighboring cells only appear to be with Unofficial Oblivion Patch, with the conflicts I checked just being the Z coordinate for things like plants and stuff.
Thanks, now that I'm home from work, I've also confirmed that this tear is caused solely by UL Ancient Yews. This will be corrected in a future release.
So, I tried your suggestion of adding the C.Water bash tag to xulCheydinhalFalls.esp and it didn't resolve the issue of the water not appearing in that one section of the stream. The area in question essentially runs from 125439, 77669, 4000 to 125860, 73967, 2912 in cell 30,18, based on things I tagged in the area.
The conflicts reported in that cell with xulCheydinhalFalls.esp were with Better Cities Full - B&M Edition.esp and BCCheydinhalFULLB&M-CheydinhalFalls patch.esp which I believe would be expected. Load order is correct and other than that one bit of water not appearing everything looks great.
"BCCheydinhalFULLB&M-CheydinhalFalls patch.esp" is the last-loaded ESP in your game which touches that cell. It sets the water height to 3000, which matches the water height set by UL Cheydinhal Falls.
"Better Cities Full - B&M Edition.esp" sets water height in this cell to 807, and uses the C.Water tag. However you have correctly placed "BCCheydinhalFULLB&M-CheydinhalFalls patch.esp" to load after the BC ESP, and "BCCheydinhalFULLB&M-CheydinhalFalls patch.esp" also contains the C.Water tag, so theoretically, the BC/CheyFalls patch should be the ultimate override for water height in the cell, since it is last-loading and contains the C.Water tag. However when the C.Water tag was first introduced with Wrye Bash, it did not work correctly, maybe it still doesn't? You could try removing C.Water tag from BC (though it really should be using it) to see whether that helps, since that's the only other ESP editing the cell containing an unwanted water height.
Found a new (I think?) conflict, this time with http://www.tesnexus.com/downloads/file.php?id=2300
Landscape coflicts (the entrance to the tomb is embedded in rocks) with UL Lost Coast in cells:
-52, -9
-51, -9
-52, -8
-51, -8
Any chance of a patch?
http://www.tesnexus.com/downloads/file.php?id=13834 :whistling: