The site plan was approved and released and shows all four sides (with heights) - files 018 and 019.
https://www.austintexas.gov/devrevie...erRSN=10944407
These are more detailed than the previous ones and show the mechanical penthouse. The previous elevations only showed the height of what was actually the main roof. It listed it as 404 feet. These updated elevations show the mechanical penthouse (box) to be 412 feet 7 inches above the street and the main roof is 405 feet, with no increase in floors. The only heights that changed were those on the main roof and mechanical penthouse.
That height is measured from 2nd Street, but the elevation of the lot drops 11 feet 2 inches along Cesar Chavez. So measured from Cesar Chavez, the building is actually 11 feet 2 inches taller. So when viewed from the south it's actually 423 feet 9 inches tall above Cesar Chavez. If you round it to the next foot, then it's actually taller than The Bowie by one foot.