Technical Consistency Review of Tetra Tech and Montgomery & Associates Groundwater Models

This memo reviews the internal technical consistency of the:  Tetra Tech numerical groundwater models (Steady-State, Mining Phase, and Post Closure models) and the Tetra Tech report Regional Groundwater Flow Model Rosemont Copper Project; and the Montgomery & Associates numerical groundwater model (Steady-State, Transient DRN, and Transient LAK models) and the M&A report Revised Groundwater Flow Modeling Conducted for Simulation of Proposed Rosemont Pit Dewatering and Post-Closure Rosemont Project.