shovel has a load capacity equivalent to the weight of 40 automobiles, that is, approximately 63.5 tonnes. A PC8000 shovel can manage a load equivalent to 50 automobiles, about . Railway The integrated railway line is long. Each train can haul 109 freight wagons, each of which can carry of of coal. The Tren del Cerrejón connects the mine with Puerto Bolívar Port Puerto Bolívar is the largest coal-export port in Latin America with covered conveyor belts and a direct-loading system since 1985, receives vessels of up to . The Puerto Bolívar shipping terminal loads bulk carrier ships of up to . The port also has a supply dock for ships of up to 70,000 tonnes which is used to supply machinery, spare parts, fuel, and other goods for the mining operation. The navigable channel is deep, wide, and . It is one of the largest coal maritime ports in South America with clean technology. Airports of runway; Mine: . Mine-Puerto Bolívar Motorway. A motorway long for operational support and access for the population of La Guajira since 1982. It links the southern part of the department with the northern part. Extraction process The extraction process begins with the identification and relocation of wildlife in the area slated for intervention. Then the land is cleared and the topsoil is removed and stored in soil banks for the future reclamation of areas intervened by the mining operation. Subsequently, the area is drilled and explosives inserted for blasting so the hydraulic shovels can remove the overburden. This waste rock is loaded on 240-tonne and 320-tonne trucks and deposited in waste rock dump sites. Once the coal seams are exposed, the tractors pile up the coal and it is loaded onto 190-tonne trucks. The coal is taken to one of two crushing plants and piled in accordance with its quality and caloric value. The plant crushes the coal, and transports it via conveyor belt to the silos for loading in rail cars. The train travels 150 kilometres to Puerto Bolívar. At the unloading station, the train unloads the coal and conveyor belts transport it to the three stacker-reclaimers, which unload it to storage piles. It is later reclaimed and sent to the linear ship-loader, which places it in the holds of coal ships. Environmental and human rights concerns In the ten years leading up to 2011, mining has been related to human rights