Peak coal black coal resources could last more than 200 years based on rate of extraction in 2007. This does not account for brown coal stocks. According to calculations conducted for the Hunter Community Environment Centre in Newcastle, the Australian state of New South Wales 10,600 million tonnes of coal reserves would be exhausted by 2042, based on current industry growth and extraction rates of about 3.2 per cent a year. Coal output peaked in 1913 in Britain at 287 Mt and now accounts for less than one percent of world coal extraction. 2007 extraction was around 15 Mt. According to the
Coal Palace red mortar. Vitric coal was also used to spell "Coal Palace" above the main entrance. Sioux City architect Charles P. Brown was contracted to design the Coal Palace; he had previously designed the first Corn Palace in Sioux City and was at the time planning the second. Born in Salem, Massachusetts, Brown moved to Sioux City in 1886 and had designed much of its downtown. Brown recognized the inherent medieval quality of walls covered in uncut coal and capitalized on this theme by adding turrets, crenellated walls, and spired roofs. Ten flags with the names of the ten coal-donating counties