http://www.dallascad.org/AcctDetailCom.aspx?ID=00C7713000TOWER00
http://www.datumengineers.com/assets/fi ... 20Book.pdf
http://www.datumengineers.com/assets/fi ... ctures.pdf
The last link states, for Cityplace,
"6, 7 & 9 Levels
9,000 Cars
2,500,000 Sq. Ft.
Post-Tensioned Concrete
1989"
while the first link states,
Parking Garage
8 stories
964,000 Sq. Ft.
1985
Now, other sources place the number of underground spaces at Tower at Cityplace between 3,300 and 3,400, which seems to mean a lot of the designed garage just wasn't completed. But is it really true that Cityplace goes eight levels underground? I haven't been inside, but always enjoyed seeing the stacked lobby atria from the freeway at night. This would make it another 50-story building, by the way.
Since the million square feet underground have (per the DallasCAD link) a footprint 79,000 sq. ft. larger than the above ground portion, and were built to be built atop, feel free to move posts over to this thread from the Xerox/ACS site -- itself the 7/11 HQ for a decade or two before 2711 (clever) was built -- conversation.