Cerro de San Pedro

The Mesoamerican historian Primo Feliciano Velázquez y Basalenque included extensive descriptions of the Cerro de San Pedro area in his accounts.

[7] In 1999, the Mexican Ministry of Environment and Natural Resources (SEMARNAT) granted MSX an environmental permit to conduct mining operations.

[2] In March 2004, the Unitary Agrarian Tribunal rejected the lease MSX had been using since 1999 to operate in ejidal lands because they had used falsified signatures.

[2] Then in 2004, the National Defense Secretariat gave MSX authorization to use of explosives, which violated a previous decree issued by the Second District Court.

Then in 2004, the National Institute of Anthropology and History (INAH) presented a lawsuit against MSX, stating that historical monuments had been damaged by the new use of explosives.

[2][7] The nearby central historic district of the city of San Luis Potosí is part of a UNESCO World Heritage Site.

[2][7] In 2010 the Supreme Tribunal nullified the permit granted to MSX in 2006 and the Environment Federal Agency (PROFEPA) closed the mine for the second time.

[8][9][10] In September 2009 the Mexican Federal Tribunal of Administrative and Fiscal Justice unequivocally declared the 2006 environmental Change of Land Use permit necessary to operate the mine “null and void.".

[2][8] 25 tons of explosives are detonated daily, and the namesake hill, Cerro de San Pedro, no longer exists.