n Regional-scale modeling of groundwater flow and contaminant transport (Great Lakes Region) n Ability to include all hydrogeologic features as independent objects n Current work is based on Analytic Element Method n Key features: q High precision q Highly parallel q Object-oriented programming q Intelligent user interface q GIS facilitates large-scale regional applications n Utilized 10,661 CPU days (32 CPU years) of computing in past year on CCR’s commodity clusters