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Coal Reserves by State in India

Reserves are recorded at the start of each financial year (i.e., 1st of April). The proved reserves are also referred to as ""measured reserves."" The UNFC classification of coal reserves is given as follow- 1) measured reserves = (3,3,1); 2) indicated reserves = (3,3,2); 3) inferred reserves = (3,3,3). Coal reserves of 0-600 m are for Jharia Coalfield in Jharkhand. Demonstrated reserves are those for which evidence has been gathered up to a moderate level of confidence through collection of samples. Reserves of Andhra Pradesh and Telangana states are proportionately split for the years prior to bifurcation, i.e., 2006-2014, based on their respective shares of the combined reserves in 2015. Indian Standard Procedure (ISP) Classification: Coal resources are classified based on the degree of assurance of exploration data. The three categories of coal resources under the ISP are proved, indicated and inferred. Proved reserves are estimated with a high level of confidence (expected variation less than 10%). Indicated reserves are estimaed with moderate level of confidence and inferred reserves are estimated with a low level of confidence. United Nations Framework Classification (UNFC) is an internationally recognised method of classification of coal reserves. Classification of Indian coal reserves as per UNFC is available for two years - 2011 and 2013 - for CIL coalfields only (not all of India). Depth-wise and field-wise reserves of lignite are available in coal directory.  

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