Lanterman's Falls Pool Depth

I come to the local community and humbly ask if anyone can link me to the following information: How deep is the pool beneath Lanterman's Falls?

Urban legends from 40+ years ago said the depth of the pool beneath the waterfall was immeasurable or bottomless. Despite the joy brought by friend-of-a-friend stories, I can't find a single article online providing an actual figure. I figured folks in the area could/would be able to link, or guide, to articles with an actual explanation and figure that makes sense geologically.

Thanks in advance to all those answering this seemingly simple question and dispelling many decades of myth.