The coal stock situation at thermal power projects has improved further as the number of non-pit head projects having less than four days of coal (supercritical stock) reduced to 58 on Monday from 69 a week ago, government data showed. According to latest coal stock data of the Central Electricity Authority (CEA), the number of non-pit head projects having less than four days of coal was 58 on October 18 and 69 on October 11.