Pennsylvania Route 51 includes the West Mifflin mall that was opened in what year?
Pennsylvania Route 51:  Century III Mall is located on this road in West Mifflin. Century III Mall: Century III Mall is an ailing enclosed shopping mall located in the southern Pittsburgh suburb of West Mifflin, Pennsylvania. Century III Mall:  Opened in 1979, and remodeled in 1997, the three-level mall contains 1290000 sqft of retail space and approximately 25 stores.
1979