Documents

The purpose of this addendum is to update the process memorandum dated October 28, 2020, titled “Cumulative Effects Analysis Overview and Screening by Resource.” The original process memo served to outline the methods and screening results used for the analysis of cumulative effects within the Environmental Impact Statement (EIS) prepared for the Resolution Copper Project by disclosing:

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Curious about how the CAP Priority System works? Here's your explainer.

Proposal to list the monarch butterfly (Danaus plexippus), the iconic orange and black butterfly, as a threatened species and designate critical habitat under the Endangered Species Act of 1973, as amended (Act).

Assessment of the impacts of the Telegraph Fire on Arizona hedgehog cactus (AHC; Echinocereus triglochidiatus var. arizonicus) located east of the town of Superior in Pinal County, Arizona.

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Materials that meet the criteria of Freedom of Information Act exemptions are not posted on this website. Culturally sensitive materials not posted here fall under this criteria.

This report presents the results of sitespecific probabilistic seismic hazard analyses (PSHA) and deterministic seismic hazard analyses (DSHA) of four sites for the RMC tailings storage facilities options in southern Arizona.

This report summarizes the meteorological, nitrogen dioxide (NO2), sulfur dioxide (SO2), ozone (O3), and particulate matter (PM) data collected at the Resolution Copper Project near Superior, Arizona for the second quarter, April 1-June 30, 2013.

In 1995, the Magma Copper Company discovered a porphyry copper deposit beneath thick postmineral cover 2 km south of the historic Magma mine in Superior, Arizona. Since that time drilling has delineated a large, high-grade, hypogene copper-molybdenum deposit, now named the Resolution deposit, with an inferred resource of 1,624 million metric tons (Mt) at 1.47% Cu and 0.037% Mo.

Fish surveys were conducted in order to determine the presence of absence of the Gila chub, as well as other native fishes within portions of Devils Canyon and upper Mineral Creek, and within two stock tanks in the vicinity of the Project. The Gila chub is listed by USFWS as endangered with critical habitat under the ESA.