Condon-Johnson & Associates (CJA) is proud
of a long and successful record installing drilled shafts
of all sizes and depths. Our fleet of modern drills includes
the very best of North American and European designs. Shafts
range in diameter from 18” to greater than 13’
and descend to depths of 200’. CJA is adept at slurry
drilling and cased methods including casing rotation and vibration.
Our shafts, which are regularly tested through advanced non-destructive
methods, receive approval ratings high above industry standards.