La Libertad Mine

Project Highlights:

  • Geologic Hazard Assessment
  • Detailed Design for Construction
  • Earthfill Conventional TSF
  • Environmental Permitting
  • Feasibility Design
  • CQA
  • As-Built Drawings and Report
  • Operations Plans
  • Dam Monitoring

Tierra Group engineers designed La Esperanza TSF, a 2.1-km long, 35-m high, earthfill tailings dam with an HDPE lined impoundment footprint of 840,000 m2. Tierra Group  designed and provided Construction Quality Assurance (CQA) for all subsequent downstream dam stages. Stage 6 and 7 dam crest raise designs incorporated mechanically stabilized earth (MSE) methods to maintain the facility within property boundaries, and reduce construction costs. Tierra Group also developed the detailed closure design for the Esperanza TSF. 

Tierra Group serves as the Engineer of Record (EoR) for the Esperanza TSF. As the EoR, Tierra Group conducted TSF dam breach and downstream inundation analyses, developed detailed TSF water balance, reviewed monthly monitoring data, conducted annual TSF inspections, and prepared an annual monitoring report to document TSF performance and dam safety.

Project Highlights:

  • Geologic Hazard Assessment
  • Detailed Design for Construction
  • Earthfill Conventional TSF
  • Environmental Permitting
  • Feasibility Design
  • CQA
  • As-Built Drawings and Report
  • Operations Plans
  • Dam Monitoring

Similar projects

Hod Mine Waste Dump and Surface Water Management Design

Tierra Group provided design review and technical direction at Hod Mine in the Artvin Province of Turkey. Work included detailed design of potentially acid generating and non-acid generating waste dump facilities, their appurtenant structures and stormwater management design for the…

VIEW PROJECT

Copperstone Project

Tierra Group International, Ltd. participated as the geotechnical lead engineering firm for the Copperstone Project Pre-Feasibility Study (PFS) in Arizona, U.S.A. Tierra Group was responsible for tailings and waste rock storage, water management and underground geotechnics design and cost estimates…

VIEW PROJECT

Dona Lake DSR

Serving on Newmont Goldcorp’s Tailings Independent Review Board, Tierra Group provided an Independent Dam Safety Review for the Dona Lake Mine tailings storage facility in Pickle Lake, Ontario, Canada.

VIEW PROJECT

Pitarrilla Mine

Tierra Group participated as a member of a multi-disciplinary project team to develop a Definitive Feasibility study for a 16,000 tpd silver mine in Durango, Mexico. Tierra Group's responsibilities included designing a 112 Mt tailings storage facility, developing a site-wide…

VIEW PROJECT

El Limón Mine

Tierra Group engineers provided engineering consultancy, design, and construction services for three Tailings Storage Facilities (TSF) (Santa Rosa, Santa Rosa West, and San José) to facilitate 20 years of uninterrupted mine operations. Tierra Group’s services spanned the full tailings lifecycle including…

VIEW PROJECT

Los Lirios Project

Los Lirios is a brownfields mine development project in southern Honduras. Los Lirios lies adjacent to an extensive shrimp-farming industry which raises water quality and supply awareness. Tierra Group is implementing a pre-development baseline water characterization study for the proposed…

VIEW PROJECT

Los Pelambres Tailings Stewardship

Tierra Group implemented a Corporate Tailings Stewardship Program at Antofagasta Minerals’ Los Pelambres Copper Mine in the Coquimbo Region of Chile. The program included data acquisition, a dam safety inspection, site-specific operations training, and improvement recommendations in tailings management practices.

VIEW PROJECT

Amulsar Gold Project

Tierra Group completed a technical review of the heap leach pad for the Amulsar Mine property owned by Lydian Armenia located near the town of Jermuk to the southeast of Armenia. The heap leach pad consists of four phases with…

VIEW PROJECT

El Diamante Hydropower Dam

Tierra Group conducted a Preliminary Site Assessment of a potential large-scale landslide near the El Diamante Hydropower Complex in Matagalpa, Nicaragua.

VIEW PROJECT

Ray Mine

Tierra Group is implementing a corporate Tailings Stewardship Strategy (TSS) at all of ASARCO Grupo Mexico’s mines in Arizona, USA (Hayden, Mission and Ray mines). Tierra Group conducted a site visit to each site to perform dam safety inspections, interview…

VIEW PROJECT

Confidential Project - Bulgaria

Tierra Group performed a pre-investment Technical Due Diligence Review that included a detailed analysis and risk assessment for a 150-m high co-disposal (tailings and waste rock) storage facility. The facility included two 80-m high waste rock platforms upon which upstream…

VIEW PROJECT

Guanacevi

Tierra Group provided Tailings Stewardship Services, including a dam inspection, slope stability review and operational improvements. The Guanacevi tailings storage facility, located in Durango, Mexico, consists of dry-stack (Press filtered) tailings placed atop a conventional (slurry) tailings storage facility.

VIEW PROJECT