The purpose of this process memorandum is to document information received from Resolution Copper regarding the variation in the lithology of mined material over the mine life.
This memorandum was written for the United States Forest Service (USFS) to document construction and results of steady-state groundwater flow modeling (Model) representing the additional engineered seepage control measures for the proposed Near West Tailings Storage Facility (TSF) designs (Alternative 2 and Alternative 3).
During a December 2018 meeting, it was agreed by the participants that a catastrophic failure of any of the alternatives would have unacceptable consequences due to the potential for impacts to life, environment and property.
This report summarizes the public and agency scoping meetings, comments received during the scoping process, and issues that require further consideration in the development of alternatives and the environmental impact statement (EIS).
Fires occur frequently in desert grassland at the eastern margin of the Sonoran Desert, but fires in the desert proper are reported to be very infrequent and of low intensity.
This document proposes an approach to monitoring and mitigation of Groundwater Dependent Ecosystems (GDEs) identified through the NEPA process as being dependent on project area regional groundwater and therefore at risk of being impacted by mine dewatering activities.
The purpose of this process memorandum is to describe additional supporting resource information in detail. The Cultural Resources section of Chapter 3 of the EIS includes brief summaries of the information contained in this process memorandum.
