In 2008, Terracon was retained to provide geotechnical services to help renovate and expand Arrowhead and neighboring Kauffman Stadium in Kansas City. The Arrowhead expansion and renovations included a new four to five-story concrete structure with below grade areas to be added around the existing stadium. The new foundations were drilled piers bearing on rock, and spread footings bearing on rock where possible. The design also included a possible rolling roof to be added in the future. Terracon's geotechnical services included design recommendations, groundwater mitigation, construction procedures, foundation settlement, retention systems, underpinning, seismic site class determination, and review of contract documents. Terracon's construction materials engineering and testing services included observation and testing of concrete, soils, and non-destructive evaluation. In addition, Terracon has provided additional services on the project as a subcontractor to the structural engineer and contractor. These services have included geotechnical and construction materials engineering and testing for various components of the project. Our contract included partnering with a disadvantaged business enterprise (MBE/WBE). Our DBE subconsultants, SK Design, KTI, and Microgeophysics, have participated in approximately 33 percent of our total contract.