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Foundation Portfolio I Feel the Earth Move The forms were half full when the builder warned the driver that things were looking a bit shaky. He started to pull away, but it was a little too late. Fortunately, no one was injured, and the mess was cleaned up and everything back on track in 2 1/2 hours. But driving too close to a trench or an unbraced foundation can be dangerous and costly. The problem here was twofold. First, the driver was too close-only two or three feet-to the edge of the trench. Second-and more important-the mixer was positioned parallel to the trench, rather than backed in as it should have been. So when things started