They don't say how deep the site is but they do eventually plan to turn it into a "diving park".
http://www.msn.com/en-us/news/world...-ever/ar-AAKa8QP?ocid=ientp#image=AAKa8QP_1|1
http://www.msn.com/en-us/news/world...-ever/ar-AAKa8QP?ocid=ientp#image=AAKa8QP_1|1