Superfund Site:

CYPRUS TOHONO MINE
CASA GRANDE, AZ

Superfund Site Profile

Site Contacts

Community Involvement Coordinator
Sarah Cafasso
(415) 972-3076

Remedial Project Manager
Andria Benner
(415) 972-3189

Site Location

Street Address:
INDIAN ROAD NUMBER 15, CASA GRANDE, AZ

Background

The Cyprus Tohono Mine site (formerly referred to as the Casa Grande Mine and the Lakeshore Mine) is located about 30 miles south of Casa Grande, Arizona. Development of the area began in the 1880s, when low-grade oxide ore was mined from surface outcrops. During the 1950s and 60s, Trans-AZ operated a small open pit copper oxide mine. In the late 1960s, Trans-AZ and the El Paso Natural Gas Company enlarged the open pit for removal of 350,000 tons of ore. Mining continued into the 1980s, with several changes of operators. Cyprus Tohono Corporation (CTC) began operating the property in ...
Continue reading background »