The golf course sits over areas both on the upstream and downstream sides. The worst of the visibility, from my experience, is typically in the upstream tunnel, especially around the 600-800' penetration range. This also happens to be a section of the system that runs directly underneath the course. Other passages run under it or next to it and seepage probably doesn't occur directly down through the ground but rather will take the path of least resistance.
Rob Neto
Chipola Divers, LLC
Check out my new book - Sidemount Diving - An Almost Comprehensive Guide
"Survival depends on being able to suppress anxiety and replace it with calm, clear, quick and correct reasoning..." -Sheck Exley
I use these for anything that might get much deeper than 100 feet (including flood peak) - http://www.onsetcomp.com/products/data-loggers/u22-001. There is a cheaper version that works well for shallower sites.
Jason Gulley
"With regard to cave diving, the great thing is to be carried where you could not have imagined you would ever be, and then to come back alive."
"Wilderness. The word itself is music." Abbey, Desert Solitaire
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