During the 2012 seven-day expedition, our team managed to extend the known horizontal cave passage from 8,445 feet (2,475 meters) to 9,845 ft (3000 m), and the maximum depth from 79 feet freshwater (24 m) to a totally unexpected 237 ffw (72 m).
These numbers officially catapulted Phantom Springs Cave to the 14th deepest and 17th longest cave in Texas, also making it the third longest underwater cave in the United States (outside of Florida). We knew then that we had to return and finish what we had begun.
For further details of the 2012 expedition. http://www.admfoundation.org/projects/phantomcave2013/phantom2013.html