[PAR] [TLE] Bethlehem Steel [SEP] The Bethlehem Steel Corporation (commonly called Bethlehem Steel) was a steel and shipbuilding company that began operations in 1904 and was America's second-largest steel producer and largest shipbuilder. [PAR] [TLE] Slickville Historic District [SEP] Slickville Historic District is a national historic district located at Salem Township, Westmoreland County, Pennsylvania.  It encompasses 90 contributing buildings and 1 contributing structure in the unincorporated village of Slickville.  The company built mining town was built between 1916 and 1923.  The contributing resources include workers and managers housing, four utilitarian mine-related buildings, a church, a school, a pump house, and a company store.  The community was originally developed by the Cambria Steel Company, and later acquired by Bethlehem Steel who operated Slick Mine No. 91 after 1923.
[PAR] [TLE] Bethlehem Steel [ SEP ] The Bethlehem Steel Corporation ( commonly called Bethlehem Steel ) was a steel and shipbuilding company that began operations in 1904 and was America 's second - largest steel producer and largest shipbuilder . [PAR] [TLE] Slickville Historic District [ SEP ] Slickville Historic District is a national historic district located at Salem Township , Westmoreland County , Pennsylvania . It encompasses 90 contributing buildings and 1 contributing structure in the unincorporated village of Slickville . The company built mining town was built between 1916 and 1923 . The contributing resources include workers and managers housing , four utilitarian mine - related buildings , a church , a school , a pump house , and a company store . The community was originally developed by the Cambria Steel Company , and later acquired by Bethlehem Steel who operated Slick Mine No . 91 after 1923 .
What year did the company, who operated Slick Mine No. 91 after 1923, begin operations?
What year did the company , who operated Slick Mine No . 91 after 1923 , begin operations ?
1904
1904