After more than 100 years of production, the Asarco plant in El Paso, Texas will clean up its mess this year as a result of one of the largest environmental bankruptcies in U.S. history. The plant has ...

This week in a Texas court, a Mexican conglomerate must confront an accusation that has long simmered in Southern Arizona: Did Grupo Mexico buy Asarco only to extract its most valuable resource — a ...

Tucson mining company Asarco LLC has submitted a proposal to pay at least $1.1 billion to settle the last of its major environmental liabilities across the country. The 110-year-old company faces $7.9 ...

Arsenic also is a well-known byproduct of the smelting industry, and throughout its 112-year history, Asarco's East Helena plant sent hundreds of tons of arsenic -- the actual amount is unknown -- ...

CHICAGO, Nov 14 (Reuters) - A federal judge has issued a ruling supporting a nearly $2.5 billion bid by Grupo Mexico , the country's largest mining company, for Asarco LLC, paving the way for the U.S.

HOUSTON (Reuters) - Texas regulators on Wednesday approved a controversial air permit to allow Asarco LLC to restart a dormant copper smelter in West Texas over objections of elected officials in El ...