41. An open pit mine began operation in 1882, and moved to underground mining by 1900. 42. Its tributary open-pit mining . 43. Maintenance is by the open-pit mine of the " Artyomugol Association ". 44. The workings include a very large open pit mine , an underground mine and four concentrators. 45. Jwaneng is an open pit mine . 46. In 1904, Jackling recommended open pit mining , using steam shovels to load railroad cars. 47. Open pit mining ended in 1976 when the pit reached a final depth of 300 m. 48. The mine has been in operation since 1983 and uses conventional open-pit mining methods. 49. Mining started at the open-pit mine in 1892 after the construction of a railway. 50. Government media reports indicate that the iron ore will be extracted using open-pit mining .
