In 2009, the government granted Gómez permission to dig. By the end of 2009 archaeologists of the INAH located the entrance to the tunnel that leads to galleries under the pyramid, where the remains of rulers of the ancient city might have been deposited. In August 2010 Gómez Chávez, director of "Tlalocan Project: Underground Road" announced the advancement of investigation conducted by INAH in the tunnel closed nearly 1,800 years ago by Teotihuacan dwellers. INAH team, consisted of about 30 persons supported with national and international advisors of the highest scientific level, intended to enter the tunnel in September–October 2010. This excavation, the deepest made at the pre-Columbian site, was part of the commemorations of the 100th anniversary of archaeological excavations at Teotihuacan and its opening to public.