1. Cerrejon is the second largest open pit coal mine in the world. 2. Open-pit coal production and underground development are not affected, the company said. 3. On Friday morning, nine deep-pit coal mines joined in, declaring a general strike. 4. The Ellen Pit coal mine was sunk in 1859. 5. Cerrej�n is considered to be one of the largest open-pit coal mines in the world. 6. The colliery closed on 18 December 2015, marking the end of deep-pit coal mining in Britain. 7. The Cerrej�n coal mine is one of the largest open pit coal mine in the world. 8. The world's largest open-pit coal mine, the West Open Mine, is located south of the city. 9. A major open pit coal mine is planned at the boundary of Jasper National Park in Alberta. 10. In 1950, the operation converted to strip mining and became the world's largest open pit coal mine.
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