Resolution Copper Mining

This memo is written to provide an explanation of the methodology used to derive the rock mass strength for the Apache Leap Tuff (Tal).

Subsidence is a slow and gradual process that is predicted, closely monitored and controlled. Mining will start from a point away from Apache Leap, and after 40 years of block-cave mining, projections are that the subsidence zone will be at its deepest (1,100 feet) but will still be more than 1,100 feet from the Leap after mining has ceased.

Describes Resolution's plan to implement the following standard practices for the prevention of invasive species introduction on Project areas located on National Forest System lands.

The Pond and Atlantis climbing areas are on Resolution Copper’s private property. The majority of the Mine area is located on Resolution’s property with Resolution holding mining claims to the remainder of the area. If you plan on climbing in these areas please click on the button below to e-sign the required waiver.

Resolution Copper (RC) has established the Independent Technical Review Board (ITRB) in accord with the Rio Tinto D5 Standard. This action comports with current international best practices for siting and design of large and complex tailings storage facilities.

Resolution Copper Mining, LLC (Resolution), proposes to conduct baseline hydrologic and geotechnical testing and monitoring activities on National Forest System lands, located within the Tonto National Forest (TNF). The purpose of these activities is to collect hydrologic, geochemical and geotechnical data in order to provide baseline information on these aspects of the environment over an area being considered for a potential tailings storage site.

Resolution Copper would implement a Wildlife Management Plan to discourage wildlife from entering active mining areas at the East Plant Site (EPS), West Plant Site (WPS), Tailings Storage Facility (TSF) and Filter Plant and Loadout Facility.

The purpose of this document is to provide personnel in all areas of the Resolution Copper Mining LLC (RCM) operation access to procedures for the proper handling and disposal of hazardous materials and hazardous waste so as to protect the environment and to comply with laws and regulations.

Resolution Copper will use these techniques to ensure that the subsidence associated with its underground operations is predicted with a high degree of confidence, is monitored, is controlled, and that a process of continuous improvement is implemented as mining expands and further knowledge is gained.

Vicky Peacey, representing Resolution Copper, thanked members for coming and participating. It was stated that the group grew out of a suggestion from a town hall meeting earlier in the year. The group is made up of local residents, for the most part, who can help Resolution with project issues, most immediately with the tailings disposal.


Comments from each of the six public hearings are available for viewing. Note that the public comment period is now closed.

Public Hearing Comments

Draft EIS

The draft EIS public comment period closed November 7, 2019. All 30,000+ comment submittals are now under review for consideration in the compilation of the final EIS.

Media & General Info

Point of Contact
John Scaggs
Tonto National Forest

Apache Leap Special Management Area
Apache Leap SMA website