Drilled shafts are high capacity foundation elements used for large bridges, high-rise buildings, and other extreme loading conditions. A hole is drilled typically using a temporary or permanent steel casing and an auger or digging bucket, as well as other tools for specific situations. A caisson can be developed in the same manner by driving or oscillating and then digging out the shaft using a spherical grab and chisel. Diameters of these shafts range from 18” to upwards of 12’. These shafts develop their load bearing capacity by end bearing and/or friction. End bearing and friction in sound rock, with additional friction load developed in clay, and, or till. Hub has an extensive line of deep foundation drilling equipment and the ability to adapt and overcome the industries greatest challenges.