Power sector coal stocks lowest since September 2005 Lowest bituminous stocks in over 15 years Houston — US coal inventories in the power sector were at a 13-year low of 99.2 million st at the end of January, down from 102.79 million st after December and the lowest since stockpiles were at 98.19 million st after September 2005, according to data from the US Energy Information Administration.  The January total was down from 123.51 million st in the year-ago month and down 34.3% from the five-year average. In the last 21 months, inventories have only increased five times from the prior month. Roughly 9% of non-lignite coal-fired power plants have less than 30 days of coal supply, while 20.9% of coal capacity has supply between 30 and 60 days. The remaining 70.1% has over 60 days […]