A new bit arrived from West Virginia at 7:00p.m. Friday, but due to its nominally larger size, the hole had to be enlarged from the surface. This operation started at approximately 8:40p.m. on Friday. Enlarging the first rescue hole with the new bit began at 1a.m. on July 27, but later stopped to replace the sleeve. At 2:30p.m. drilling was stopped again as the operation damaged the outer cutting bits and a new bit assembly was needed. At 3:30a.m. a decision was made to change to a bit since there was one available south of the mine in