Clifty Creek Power Plant is a 1.3-GW coal-fired power station located at 38°44?16?N 85°25?08?W? / ?38.73778°N 85.41889°W? / 38.73778; -85.41889Coordinates: 38°44?16?N 85°25?08?W? / ?38.73778°N 85.41889°W? / 38.73778; -85.41889 in Madison, Indiana, USA. Five of its six identical units began operating in 1955,[1] the sixth unit was launched in 1956.[2] It has one of the tallest chimneys in the world, at 300 metres (980 ft).