Problem Two identical grain storage buildings in South Dakota (one in Roscoe, the other in Andover) were experiencing concrete foundation settlement. The buildings each store 1.5 million bushels of grain, are 600 feet long by 135 feet wide, and feature a series of tunnels beneath them to assist with grain conveyance and to provide ventilation. The foundation slabs for both buildings were eight-inch reinforced 3,000 psi concrete. URETEK was contacted to help level the concrete foundations and stabilize the underlying soils, with a focus at each building on a 12-foot by 600-foot section on either side of an aeration tunnel that had settled and cracked. Analysis During the first 18 months of service, the Roscoe warehouse averaged 1.5 inches of foundation settlement, while the Andover w

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