Ron Kittle at the impressive H'Doubler entrance. 
Don't let the entrance size fool you. 
Within a few hundred feet, cavers are forced to bellycrawl through breakdown.

BillHeim, Ron Kittle, Lloyd Morrison, Roy gold, and Jack Rosenkoetter in terminal
Waterfall Room of H'Doubler Cave, a half mile cave where the crew
spotted two bristly cave crayfish (Cambarus setosus).