here's the latest estimates using bing's bird's eye view
the grand hyatt measurement (in cm) is what the others are based off of
formula: [(building height in cm) x (424)] / 8.76
Marriott Rivercenter
roof: [(6.77) x (424)] / 8.76 =
328'
pyramids: [(8.52) x (424)] / 8.76 =
412'
spires: [(9.26) x (424)] / 8.76 =
448'
Tower of the Americas
roof: [(12.90) x (424)] / 8.76 =
624'
Weston Centre
top of "box": [(9.22) x (424)] / 8.76 =
446'
Tower Life
top of structure/bottom of flagpole: [(7.86) x (424)] / 8.76 =
380'
Drury Plaza
roof: [(5.84) x (424)] / 8.76 =
283'
top of sign: [(6.3) x (424)] / 8.76 =
305'
Bank of America Plaza
roof: [(7.73) x (424)] / 8.76 =
374'