Tierra Group evaluated geotechnical and hydrogeological characteristics of Tajo Crimea Pit to determine in-pit tailings storage feasibility. The project scope defined geotechnical and hydrogeologic site conditions through field investigations, and in-situ pump testing. A 3D groundwater model was developed to evaluate potential interaction between tailings supernatant and groundwater. Following the Feasibility Study, Tierra Group completed an alternatives analysis comparing in-pit tailings storage with the Stage 7 Esperanza TSF expansion.