Anaconda Smelter Stack is a radial brick smoke stack, once part of the Anaconda Smelter at Anaconda,
Montana in the United States.
The stack rests on a
concrete foundation and measures 585 feet (178 m) high. The inside
diameter of the stack is at the bottom and at the top. The wall
thickness ranges from six feet at the bottom to two feet at the
Construction of the stack was completed on May 5, 1919. The Stack
was built by the Alphons Custodis Chimney Construction Company of
New York. At the time it was built, it was the tallest masonry
structure of any kind in the world. The Stack remains the tallest
and possibly largest free standing masonry structure in the world.
An interesting note is that the Washington Monument
would easily fit
inside. It is commonly referred to as 'The Stack' and is a well
known landmark in western Montana.
The stack was designed to discharge exhaust gases from the various
roasting and smelting furnaces at the smelter. The stack is
situated on the top of a hill. The smelter had a large network of
exhaust flues from the furnaces that all fed a main flue. The main
flue carried the combined smelter exhaust gases a half-mile up the
hill to the stack. The flue system and stack combined to provide a
natural draft to carry the smelter exhaust gases, and it was
claimed to be capable of handling three to four million cubic feet
per minute of gas.
The Anaconda Smelter was demolished after its closure in 1981, and
the site underwent environmental cleanup. The stack alone, however,
remains standing. After the smelter’s closure, citizens of
Anaconda organized to
“Save the Stack,” and in 1986 it was designated a state
The site is known as Anaconda Smoke Stack
- Aarstad, Rich, Ellie Arguimbau, Ellen Baumler, Charlene
Porsild, and Brian Shovers. Montana Place Names from Alzada to Zortman. Montana
Historical Society Press.