Home of Penn State Nittany Lions Football, Beaver Stadium is the second-largest venue in the Big Ten Conference and the fourth-largest in the nation. Beaver Stadium has an approximate seating capacity of 103,500 people, after the latest expansion and renovation of the facility, which included the addition of a 10,000-seat upper deck in the south end zone.

Prior to the start of the 2004 season, the surface of the site in the vicinity of an existing water pump (near the ticketing area of the stadium) experienced subsidence extending below an adjacent refrigeration unit.

Structural Preservation Systems was retained to perform Low Mobility Grouting (LMG) to improve the existing subsurface voids and displace soft/compressible natural soils which are subject to sinkhole activity. The objective of the grouting was not to densify or permeate the existing soils, but to create a grout column displacing any soft/compressible soils and filling any voids. The improvement of the subsurface instability resulted in eliminating the potential for sinkhole development.

SPS used pneumatic drilling and grouting techniques to evaluate and repair the settled areas. Specialized drilling equipment was needed to install grout pipes at various angles and work in close quarters. To accomplish this challenge, SPS utilized a low headroom access drill rig able to operate in an area measuring five feet wide by six feet high and capable of drilling at the various angles. SPS personnel and equipment immediately mobilized and successfully completed the project within five working days.