The job required installation of more than four dozen helical piers below the footing of the retaining wall. An existing trench more than three feet deep was surrounded by softly compacted fill dirt. The softness of the surrounding fill created precarious conditions for the skid steer needed to install the helical piers. Instead, the Cantsink crew attached an extra-long, 27-foot boom to the front of the skid steer, which allowed the drive head to reach over a 10-foot span to reach the trench for installation without danger of collapsing the soft soil around it. The engineer also specified that the piers had to be installed at a 25-degree angle at the front edge of the retaining wall footer and a 45-degree angle along its rear edge.