Back in the 1960s, Perkins Cave was surveyed using carbide lamps to mark stations and trying to extend the cave in many directions at once. The 1972 map shows blobby walls and no passage detail over in the U Survey section. Naturally there must be some leads going north that they missed.
The blobby northern section is mostly a massive wall of breakdown. Our March trip tried to survey a way over or to the right of the massive breakdown pile. We met only dead ends too small for humans. On April 8, Emily Graham, Piotr Suder, and I headed to the lower section and to the left of the breakdown pile. We still hoped that the breakdown pile could be surveyed over/under/around/through.
The previous day’s deluge left the breakdown drain area wet and slippery. Piotr and Emily pursued the slippery lead into a hole that quickly became too tight for humans. Off to the left we scaled and surveyed our way up into a room of pickup truck-sized breakdown. Off in one corner we found a dead bat clinging to the ceiling and covered in white nose fungus. Behind that Piotr squeezed past other fungus on the floor and into a breakdown-choked passage.
Alas, no good leads. Piotr did a great job leading us out of the cave without ever consulting the old map. And I fastened the lock on the cave gate in under thirty seconds.