Inco Superstack
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The Inco Superstack in Sudbury, Ontario, with a height of 381 metres, is the tallest chimney in Canada and the Western Hemisphere, and the second-tallest freestanding chimney in the world after the Ekibastuz GRES-2 Power Station in Kazakhstan. Wikipedia
Height: 1,250′
Construction started: 1970
Completed: 1972
Coordinates: 46°28′48.23″N 81°3′23.43″W / 46.4800639°N 81.0565083°W
Cost: $25 million ($160 million inflation adjusted)
Diameter: at base: 35 m (115 ft); at top: 16 m (52 ft)
Material: Reinforced concrete with stainless steel liner