Is located in the community of the same name and it is possible to arrive to the place where it was once located through the road which goes from Acosta Mine, site museum in Real del Monte, or through the access to the community taking Pachuca-Tampico highway. During the 19th century it operated more as a mill for the ore that latter was processed at Velasco plant. But after 1906, already as part of the properties of a new group of American businessmen, it started a modernization process that positioned at the forefront of ore processing technology at the moment of its inauguration in April 25, 1908. After 22 years of operation, Guerrero stopped receiving ores in March, 1930.

Is the oldest of the three plants mentioned in this section. It belonged to the Third Count of Regla who sold it in 1824 to the English company. This was the most important ore processing through the Freiberg method during the English period. The hacienda is at Omitlán´s main entrance coming from Real del Monte, due to its location it is possible to see its interior from the street: a dwelling house, vestiges of other buildings and the chimney next to the street. It is private property; therefore, it is not easy to have access to it.