Ground improvement is the primary application of many geotechnical construction techniques, permitting construction on soils by changing their characteristics. Soil mixing increases shear strength and reduces compressibility and permeability of soft soils. Dynamic compaction permits shallow spread footing construction, collapses voids, and lowers the liquefaction potential. Injection systems improve the characteristics of expansive clays. Rapid impact compaction permits shallow spread footing construction. Vibro compaction, vibro replacement, and Vibro Piers, improve granular soils for higher bearing capacity, reduced settlement, and reduced liquefaction potential. Rigid inclusions reduce settlement and increase bearing capacity of weak underlying stratum. Vibro concrete columns reduce settlement, increase bearing capacity, and increase slope stability. Hayward Baker has experience with the full range of ground improvement techniques to improve soils.