Documents

This study evaluates the subsidence associated with caving at Resolution Copper through estimation of the angle of break using the empirical method developed by Laubscher (2000).

U.S. DOT Crossing Inventory Form, 2 pages.

The purpose of this process memorandum is to signpost the process steps that have taken place since publication of the DEIS in order to assess and respond to comments about alternative mining techniques, document the conclusions reached, and the rationale for these conclusions.

100' slices through the deposit from the geologic model.

Tailings dams are geotechnical structures that are increased in height with time. Several factors typical of tailings dams cause a higher risk of failure compared with other earth structures. The factors that influence the risk of tailings dam failure are discussed in this paper.

To assess the cumulative impact associated with use of groundwater for the Resolution Copper Project, modeling of proposed Resolution Desert Wellfield (DWF) pumping in East Salt River Valley (ESRV) was conducted in 2020 in support of an Environmental Impact Statement (EIS) using what was then ADWR’s current Phoenix AMA groundwater model. Results indicate that without Resolution DWF pumping, but including all other reasonably foreseeable future uses, pumping depths to groundwater beneath the Desert Wellfield at the end of a 100-year predictive period would be approximately 550 feet.

Managing regional aquifer systems within the arid southwestern U.S. basins requires an understanding of the extent to which aquifer recharge and withdrawal impacts the systems, both spatially and temporally.

Following the Resolution Copper Groundwater Modeling Workgroup held on January 16th, SWCA forwarded an email communication detailing the questions from the U.S. EPA on January 25th (email provided in Appendix A). This memo provides responses to EPA’s comments and supporting information.

Some copper deposits can have up to a dozen strategic and critical mineral and materials as co- products, making copper a gateway mineral to these rare elements.

This is the Record of Decision (ROD) for the U.S. Department of Agriculture, Tonto National Forest's travel management decision to comply with the 2005 Travel Management Rule, 36 CFR 212 Subpart B, to provide a system of National Forest System roads, trails, and areas on National Forest System Lands that are designated for motor vehicle use.