Is there a 30m platform dive?

Answer 1

No there is no a 30 meter diving platform - it goes:

1 meter springboard (3 feet 3 inches)
3 meter springboard (9 feet 9 inches)
5 meter platform    (16 feet 4 inches)
7.5 meter platform  (24 feet 6 inches)
10 meter platform   (32 feet 8 inches)

Olympic diving takes place on the 3 meter springboards & the 10 meter platform.

people do dive from higher than this but it can be extremely dangerous if you are not trained etc, even the 10 meter platform can be hazzardous.

people have died even from 50-60feet jumps, therefore 30 meters totaling nearly 99feet executing headfirst dives is basically not possible.

hope this helps
-Jake