Our assignment this week was to continue the survey at SEXy8, where the previous team had been "flushed out" by rapidly-rising water in the passage, ending their survey. I came prepared with lineplots and survey notes, and was ready for a wet survey. We visited the GVKS field house for about 45 minutes, but stayed at John Harman's house in Germany Valley, meeting up with the rest of the crew at Seneca Caverns at 9am. Ralph Hartley, the only scheduled member of our team who had actually been to the SEXy survey, was a no-show, so we prepared for the backup plan: digging toward plugged borehole at the end of the HSB survey.
Our team - myself (Dave Riggs), John Harman, and Cullen Hencke - entered the cave intermixed with the EAS19 survey team (Ed Devine, Steven Collins, Josh Flaugher), and were in cave by 12:00 noon. With Steve's help, we made an attempt to locate the SEXy survey, but couldn't find the correct lead. If nothing else, this at least provided a good running joke about "finding the SEXy" for the rest of the day. We made good time back to the 100 foot room, made the climb up into the Southwest Express and ditched most of our vertical gear (we kept our harnesses and cowstails for a traverse in HSB).
We dropped down into the passage on the lefthand side and I had my first chance to finally see this passage - "Holy Shit, Batman!" The HSB passage starts out as a beautiful, round phreatic tube covered in gypsum and calcite formations. It zigs and zags around a corner to a large domepit with a traverse line around the side. A rope is rigged here which I believe leads one down towards Silent Stream. From here, there are even more formations covering the walls, and the floors are entirely made up of dry rimstone dams several inches deep. We climbed up two large flowstone waterfalls, passed the turnoff to the Batman Domes, went under some more spectacular formations, and arrived at our destination.
The 20 foot wide, 8 foot tall passage ends very abruptly in a vertical clay plug. From our side of the plug (the downstream side, according to scallops), there is no indication whatsoever as to what caused this sediment load to be dropped here. We found an 8 foot deep tunnel which a previous digging party had started, of dimensions about 4 foot tall and 2 foot wide. We continued this digging effort and attempted to keep the dimensions the same.
The three of us rotated in shifts, one man digging, one man unloading our spoil sled, one man resting. We dug continuously until almost 01:00, the character of the clay, the height of the ceiling, the non-existent airflow all were relatively unchanging. It was a pleasure to dig in such consistent clay, moist but not sloppy wet, with no rock to deal with, and in "large" passage at a normal angle. The horizontal "mine shaft" now extends straight back into the clay plug for 25 feet, but the plug remains just as mysterious as when we found it. The dig could continue for another 6 inches or it could continue for another 600 feet. Out of water and food, and tired from the constant digging, we gave up on our hopes of breaking into the borehole that we knew was waiting for us on the other side.
The trip out was uneventful, and we made fairly good time, only getting tripped up briefly while trying to find the Corkscrew on the way out. From Mt. Suribachi, there were a tremendous number of very active, curious bats checking us out. We exited the cave at around 04:00, after the EAS team and (well) before the Silent Stream team. Underground 14 hours, dug 15 - 20 feet, surveyed zero feet.
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