How deep sould the water be for a high jumping deck?

Question

I am the crazy type that you would see jumping from the tops of old closed bridges and the city done away with my favorite one. So I am planing on building me a in-door swimming pool with a jumping deck about 50' (50 Feet) up in the air.

P.S.

I jump feet frist (NO Diving)

My favorite jumping bridge:

It was about 20' (20 feet) to the surface of the water. The water was about 15' to 20' (maybe 30') feet deep. (I never hit bottom).

How deep sould the water be for a jumping deck that is 50' (50 Feet) high?

Answer 1

23000 ft deep

Answer 2

Our competition divers go 10 meters (30 feet) as their highest dive, and the water is 18 feet deep. I would say anywhere around 25-30 feet deep should be sufficient.

P.S. - I jumped from a 20 foot waterfall into no more then 4 feet of water. If you use a "compact" jump (a modified version of a cannon ball pretty much) you'll slow down and not break your legs upon hitting the bottom. I'm not sure if this'll hurt like a #%$#^ from 50 feet, but you could try making your feet extend after you hit the water so you slow down more.