If it is the one I am thinking about, it is mostly sidemount.
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If it's Blue Spring State Park in Barbour County, I've been in it.
JB is still looking good. I did Hole in the Wall with a couple guys today and it is still good but not as good as it was just a few days ago. Vis on the Upstream side averaged about 40ft up to p1200 with it getting as low as 20ft up to p500. There are new line arrows every 100ft thanks to Edd and Jim Clark. The downstream side averaged about 30ft to p1450 of vis with 40ft in some places. The new gold line looks real good. No noticeable flow at any point and a thermocline below 70ft of depth drops the water temp to around 64-65F