FURNACE #6 of the once abandoned Carrie Blast Furnace.
Located just outside the Pittsburgh city limits, Carrie Blast Furnace was once part of the Homestead Steel Works. The two furnaces that make up the site were built in 1907 by Carnegie Steel and ran almost continuously until 1978. At its peak in 1910, the steel industry in Pittsburgh produced more than 60% of the total production in the US. The peak period of production at Carrie Blast Furnace was in the 1950s and 1960s, when the seven blast furnaces here were each producing 1,250 tons of iron ore every day.
During the 71 years of operation, changes were made to the blast furnaces, but they remained virtually unchanged after 1936. This outdated technology was one of the chief reasons that furnaces 6 and 7 were the first ones shut down when the complex began to shut down. It was also the reason that these were the furnaces chosen for preservation by Rivers of Steel National Heritage Area.