Ah ok, thanks for clarifying that up. I know exactly where you are talking about now!
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Let's see, the alternate entrance to Morrison's is near Jackson Blue? Yeah....
Only relatively... Its more in between the deep section at Jackson Blue(not on the map-secret!!!) and where Die Polder opens up to the huge passage that is the floridian aquifer. So if you meet the two systems halfway... you might be close to... Ginnie(Oh snap!).
If there's something closer, we'll need to take one of our boats.
Yeah, that's still on my to-do list... have to wait for the water to be low again!
I have studied the talus slope at the bottom of the spring just outside the restriction. IMHO, the only way to safely excavate the restriction would be to jet/install about 15 lineal feet of sheet pile 6 feet into the base of the sand slope. This would provide a retaining wall to prevent a downward shift of the talus slope and infilling the restriction. Obviously, any kind of approval for such a structure would be impossible to obtain.
Several months ago I meet one of the retired Navy divers that blew the arch that collapsed onto the entrance of the lower chamber. He was so proud of his effort. I was doing my best to keep my hands from closing in around his throat.
Vince, I disagree. I believe that with about a 12 inch airlift, 175 CFM compressor,and about 150 feet of 12" flex discharge hose, using surface supplied gear, you could get most of that junk out of the way in two or three days. Hell, give me two weeks, and I could suck all the silt out also. We can just discharge into the spring run, right? Then a day or two with a 90 pound jackhammer, and there you go.