The site plan was posted to the city's FTP site today with the elevations. There was a reduction in height from 32 floors to 30 floors. These show the height all the way to the top of the mechanical screen (the old elevations did not), and it is 346 feet 5 3/4 inches tall.
ftp://ftp.ci.austin.tx.us/ATD_AULCC/...ofts_PLANS.pdf