Mineros Advances Porvenir Project Development; Detailed Engineering Underway Following Independent Engineering Review
MEDELLÍN, Colombia, August 18, 2026--Mineros S.A. (TSX: MSA; BVC: MINEROS; OTCQX: MNSAF) ("Mineros" or the "Company") announces that it has entered the detailed engineering phase for the development of its 100%-owned Porvenir polymetallic deposit (the "Porvenir Project" or "Porvenir"), located within the Hemco Property in Nicaragua, following an independent engineering review of the updated pre-feasibility study announced on March 31, 2026 (the "2026 PFS"). A construction decision is expected in early 2027.
"Porvenir represents a transformative asset for Mineros, and we are treating its development with the technical and financial rigor it deserves," stated Daniel Henao, President and Chief Executive Officer. "By partnering with globally recognized engineering firms to validate our technical work, we are ensuring a seamless transition into detailed engineering. The ongoing design optimization of the mine and processing plant, our drilling campaign for both the mine plan and metallurgy, the preparation of early works, and our progress on permitting all underscore our commitment to maintaining momentum and unlocking the full value of the Porvenir district for our shareholders."
Gap Analysis and Detailed Engineering Readiness
To ensure effective capital allocation and project execution, Mineros engaged a consortium of globally recognized engineering firms, including BBA Inc., NCL Ingenieria y Construcción, Mining Plus, and Tanka Engineering, to conduct a comprehensive gap analysis of the Porvenir Project's technical parameters. The review confirmed the Project's readiness, and detailed engineering has already commenced on the main components of the Project.
Mine Plan and Metallurgy De-risking
Mineros is currently undertaking a targeted drilling campaign at Porvenir. The drilling is designed to reduce geological uncertainty, de-risk the first three years of the underground mine plan and support the metallurgical test work being conducted as part of the detailed engineering for the processing plant. This approach is intended to increase confidence in both the initial production profile and the processing flow sheet.
Early Works and Permitting
To proactively de-risk the project timeline and enable rapid mobilization should a construction decision be made, Mineros is preparing to initiate early works at the Porvenir Project site in areas where the required permits have been obtained. These activities will focus on critical-path infrastructure, including the construction of site accesses, preliminary earthworks, and surface platforms.