Resolution Copper Mining Near West Tailings Management Mine Plan of Operations Study

This report presents the plan of operations level design of a Tailings Storage Facility (TSF) at the Near West site.

Previous Site Selection Study

KCB conducted an alternatives assessment for tailings disposal options in the Near West area in 2012 and 2013. The Near West area for this study was defined as the area located northwest of the town of Superior and south of the Superstition Wilderness area. Five locations in the Near West area were considered. Of the five locations, Whitford Canyon and Hewitt Canyon are located furthest north, close to the Superstition Wilderness. Silver King is a bowl canyon located directly north of Superior. Happy Camp East is located directly west of Superior in a flatter sloped area, between the washes of Whitford Canyon and Silver King Canyon. Happy Camp West is located further west than Happy Camp East, between the washes of Hewitt Canyon and Whitford Canyon. The Happy Camp West (named the Near West site) is the tailings site described in this report).