In 1985, the J & L Steel site on the north side of the Monongahela river was cleared and a publicly subsidized High Technology Center was built. The Pittsburgh Technology Center, home to many major technology companies, is planning major expansion in the area soon. In the 1980s, the "Renaissance II" urban revitalization created numerous new structures, such as PPG Place. In the 1990s, the former sites of the Homestead, Duquesne and South Side J&L mills were cleared. In 1992, the new terminal at Pittsburgh International Airport opened. In 2001, the aging Three Rivers Stadium was replaced by Heinz Field and PNC Park, despite being rejected by voter referendum. In 2010, PPG Paints Arena, replaced the Civic Arena, which at the time was the oldest arena in the National Hockey League.