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Coal India Limited (CIL) is an Indian state-controlled coal mining company headquartered in Kolkata, West Bengal, India. It is the largest coal producer company in the world.
Coal mining in Government sector had started in India in the year 1956. Till then, it was totally under the private sector.
In September 1956, Government of India established its own coal company National Coal Development Corporation (NCDC). Collieries run by the Railways formed the nucleus of NCDC. This was to fulfill the fast growing energy requirements in the country to support rapid industrialization taking place through 5-year Plans of the Government. In the same year, Singareni Colliery Company, which was operating in Andhra Pradesh since 1920, was also brought under government control when the Central Government and Andhra Pradesh Government acquired its 45% and 55% shares respectively.