Place:Piedras Negras, Coahuila, Mexico

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NamePiedras Negras
Alt namesCiudad Porfirio Díazsource: Encyclopædia Britannica (1988) IX, 430
TypeCity
Coordinates29.183°N 100.883°W
Located inCoahuila, Mexico     (1849 - )
source: Getty Thesaurus of Geographic Names
source: Family History Library Catalog


the text in this section is copied from an article in Wikipedia

Piedras Negras is a city and seat of the surrounding municipality of the same name in the Mexican state of Coahuila. It stands at the northeastern edge of Coahuila on the U.S.-Mexico border, across the Rio Grande from Eagle Pass in the U.S. state of Texas. In the 2015 census the city had a population of 163,595 inhabitants,[1] while the metropolitan area had a population of 245,155 inhabitants.[1] The Piedras Negras and the Eagle Pass areas are connected by the Eagle Pass-Piedras Negras International Bridge, Camino Real International Bridge, and the Eagle Pass Union Pacific International Railroad Bridge.

In Spanish Piedras Negras translates to "black stones" – a reference to coal deposits in the area. Across the river, coal was formerly mined on the US side at Dolchburg, near Eagle Pass. This mine closed around 1905, after a fire. Mexico currently operates two large coal-fired power plants named "José López Portillo" and "Carbón 2" located south of Piedras Negras. These two coal-fired power plants are currently operated by MICARE, which engages with the mining and distribution of coal.

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