I recently ventured to the remains of Universal Atlas Cement in Penn Hills, Pennsylvania. The cement factory opened in 1906.

 

United States Steel, the owner of Universal Atlas, announced drastic cutbacks at 16 facilities affecting 13,000 workers on November 27, 1979—including its Penn Hills plant, which affected 180 employees. Aerials showed the plant derelict by 1993 and partially demolished by 2005.