was opened in 1972, after years of planning by the WPC and the School District of Philadelphia and conflict with the displaced community. Unit 4 Much of what is now the center of Penn's campus, including Locust Walk and Superblock, was part of the redevelopment of Unit 4. Over the course of 1968 to 1970 and with the assistance of the local redevelopment authorities, Penn acquired, cleared and redeveloped the four-block area between 38th, 40th, Spruce, and Walnut streets. The primary features of this area, which became known as "Superblock", are three high-rise apartment-style dormitories. The key purpose of creating these high-rises was to accommodate 3,500 more students at the university. The whole superblock project and especially the high-rise design were widely criticized, but this view is not held by everyone. Other activity WPC also guided several other redevelopments that directly benefited Penn and Drexel. Project "A" was the plan to redevelop Units 1a, 1b and 2, the land between 32nd, 34th, Walnut and Chestnut. This resulted in Penn's Women's Dorm (now Hill House) and several Drexel buildings along Chestnut. Additional areas were carved out for Penn's Wharton and Annenberg schools and Physics department. Unit 5 was reserved for Drexel. Schuylkill riverfront Along the west bank of the Schuylkill River lie several large parcels of land that have historically seen large-scale non-residential use. As of the 1960s, the most prominent uses of this area were for Philadelphia's main train station, post office, and civic center. Since then, these and other nearby parcels have seen significant redevelopment. Rail yards Of particular interest for redevelopment have been the large rail yards near 30th St. Station, now owned by Amtrak. Several plans were made to cover and build over this area. As of 2015, most of these plans, including a baseball stadium and grounds for a World's fair have been scrapped, but a new plan called "30th Street Station District" is in the works. The Schuylkill Yards project is also in this area. A small part of this area was used to build the Cira Centre, a 29-story, crystal-shaped office tower with distinctive LED lighting visible at night. Civic Center complex Beginning in 1991, Penn publicly expressed official interest in acquiring the to the southeast of its campus occupied by the Philadelphia Civic Center complex. After the opening of the Pennsylvania Convention Center in 1992, the Civic Center was mostly unused. In 1998,