minor adjustments raised the seating capacity to more than 90,000. In 1984, a new $2.1 million scoreboard was installed. The stadium was heavily renovated from 1998 to 2001. The press box was replaced, additional seating was installed, and 81 luxury suites and 2,500 club seats were added. The south end zone scoreboard was also replaced by a video board that is able to show replays, highlights, animations, graphics and statistical information. Additionally, a smaller version of the south end scoreboard was added to the north end and a new LED ribbon board that runs end-zone to end-zone was added to the balcony prior to the 2009 season. In 1998, the track was removed and a slurry wall was built underneath the field to allow it to be lowered , which places it below the water table. After the 1999 season, the field of play was lowered to add seating closer to the field. The temporary bleachers in the south end zone were replaced with permanent seating. However, the south end of the stadium remains partially open, thus allowing the stadium to maintain its notable horseshoe configuration. General improvements were made in the seating and concourse areas. The result of the $194 million renovation was a capacity that rose to 101,568. 80% of the cost of the renovation was funded by the sale of leases on the suites and club seats, with the remaining 20% funded by donations and the sale of naming rights for portions of the stadium. No public or university money was spent in the renovation process. In 1971, the natural grass field was removed, and AstroTurf was installed, compliments of a donation by Lou Fisher in dedication to fellow football player Joseph Campanella. A plaque was placed on the southeast corner in memory of Campanella. In 1979, the surface was replaced with SuperTurf. In 1990, natural grass made its return to the Horseshoe, in the form of a special grass called "Prescription Athletic Turf." New field designs were put in place for the 1992 season and existed through the 2006 season. During the 2006 season, problems with the natural grass began to arise. After serious damage to the field during use in the spring of 2006, the field never recovered and had to be re-sodded. That grass never took root because of bad weather, and the university was forced to re-sod the field again only three weeks