[Doctor Stochastic]

So you are claiming that rock bridges are not designed, but natural? Formed by natural processes? No designer at all?

[Heartlander]

”…we know a rock bridge can form by natural processes alone…

I am quoting my initial quote.
To answer your question, yes, a rock bridge can form by natural process.

[gore3000]

"So you are claiming that rock bridges are not designed, but natural? Formed by natural processes? No designer at all?"

Yup.It's quite simple for the force of water to dig a hole. That is all a natural bridge is. It needs no design. However, since according to atheists natural forces can create complex things. It would be nice if you could show us a cantilever bridge that was not designed by man.