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Costa Rica
T he Bellavista Project is a proposed gold mining and processing operation. The major components associated with the project include an open pit mine, waste rock dump, and heap leach facilities. The proposed production is 1.62 million tones of ore per year over an estimated eight-year mine life.
The Project site is located approximately 70 km northwest of the city of San Jose and about 3 km northeast of the town of Miramar in Costa Rica. The site lies at an elevation of 650 meters on the lower southwestern slope of the Tilaran Mountains, an area with generally very steep and broken topography and a moderate seismic hazard. Average annual precipitation is about 2,815 millimeters.
DAA team members performed the feasibility and detailed engineering design for the heap leach pad and process solution ponds. The pad is approximately 350,000 square meters in area and designed to receive about 12 million tonnes of ore over 8 years.
The design work included subsurface exploration, site grading calculations, heap tonnage phasing, heap stability analyses, leach solution drainage, water balance computations, pond, pitch and pipe sizing, storm diversion design, and design drawings.
The work also included a site-wide Stormwater Management Plan including the detailed design of the stormwater/ sediment control pond to be used during initial construction of a site-wide network of stormwater diversion channels and sediment catch basins. Geotechnical site investigations for the ponds and waste rock dump were conducted as part of the workscope.