Geo-Jet®: The soil/cement mixing process brought to market by Condon-Johnson & Associates, has revolutionized earth retention, ground improvement, and seismic stability practices. Learn more

Drilled Shafts: The foundation of choice for heavily-loaded, seismically-sensitive structures, are installed by CJA using a complete range of drills from 18 inches to greater than 13 feet in diameter. Learn more

Shoring/Soil Nailing: CJA is an expert at all types of earth retention and is pleased to assist our clients in the selection of the most economical solution for their specific project. Learn more

Sheet Piling: CJA utilizes a fleet of state-of-the-art pile-driving equipment.
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Stone Columns: Installed to improve bearing capacity, and mitigate liquefaction for sites which are underlain by loose granular and fine grained materials below the water table. Learn more

Jet Grouting: Cement columns are formed with the use of high-pressure air and water to create deep foundation units, eliminate basal instability, and form water cut-off barriers. Learn more