Ningha UG mine, with normative annual production capacity of 0.040 mt and peak annual production capacity of 0.100 mt, had an expected life of over 50 years. Mithapur West UG mine and open cast patch, with normative annual production capacity of 0.28 mt and peak annual production capacity of 0.342 mt, had an expected life of over 50 years. Satgram UG mine, with normative production capacity of 0.85 mt and peak annual production capacity of 1.200 mt, had an expected life of over 30 years. As of 2015–16, there was no production from Bhanora UG mine, Girmint/KDI UG mine and Sripur UG mine. In Sripur Seam Incline UG mine, Rana (R-V) seam was being worked manually. In Ningha UG mine, Dishergarh (R-IV) seam was being worked by board and pillar method. There was no production from Mithapur West UG mine and OC patch. In Satgram UG mine, R-IV and R-III seams were being worked. See also – Salanpur Area#Mining plan for Bhanora West UG mine and Bhanora West OC patch See also – Satgram Area#Mining plan for Ghusick, New Ghusick and Kalipahari collieries  India is the third largest coal producer in the world. Mining is a highly organized industry, but there are gaps and loopholes. Beyond, or rather underneath, the well-organised industry, there is a large sector described as illegal mining. According to Haradhan Roy, the veteran political leader and trade unionist, about a million tonnes of coal are produced by illegal collieries in Raniganj alone. The total annual national production from such mines in India is not less than 20 million tonnes. In 2001 there were at least 33 identified sites of unauthorized mining in Raniganj. Of these many were in Salanpur, Sripur, Satgram and Sodepur Areas. Seven are outside ECL's lease-hold land. However, apart from the identified areas, such activities are spread across the entire region. Systematic mining and movement of coal by the railways, started in the mid-nineteenth century in the Raniganj Coalfields, led by Carr, Tagore and Company. The conventional "board and pillar" system was used in Indian underground collieries.