The height in the thread title (585'/51-stories) came from the first elevations we saw that Max posted on page 4 of this thread. But it looks like the tower was slightly trimmed to 573'/50-stories.
The 128 page Density Bonus Approval file that was added to the site plan the day it was approved has different elevations on pages 87 and 88. Also, this file is different than the backup file that was shown to the Design Commission:
https://abc.austintexas.gov/attachme...NftXO0og%3D%3D
The tallest elevation is the west side at 570'. The highest residential level is 48, but there appears to be two more partial amenity levels above that.
The south elevation is about 3' feet lower than the other sides.