Borehole 10X was started in the summer of 1970 and is approximately 55 meters (180 feet) northeast of the Money Pit. Triton Alliance hired the Bowmaster Drilling Company, who employed a 15 cm (6 inch) rotary drill to bore down to a total depth of 70 metres (230 feet). Bedrock was encountered at 55 metres (180 feet), and at 70 metres (230 feet) and a cavity was found. While this cavity has become famous for the contents thought to be contained within, it was not the only cavity found while drilling Borehole 10X though. Two more cavities were passed through, above bedrock, on the way. They were encountered at depths of 43 metres (140 feet), and 49 metres (160 feet). When Triton Alliance widened the borehole to allow people access to the depths, Borehole 10X officially became the 29th Shaft on Oak Island.