Excavations Excavations are any man-made cut, cavity, hole, trench, or depression made in the earth’s surface by the removal of soil. Workers in excavations can be exposed to cave-ins, engulfment, hazardous atmospheres, and falls. Excavation safety training and procedures prevent serious injuries and accidents. Before work on an excavation can begin, surface hazards such as unstable buildings, sidewalks, etc. that could endanger employees must be secured or removed. Hazards below the ground must also be identified and made safe before work can begin. Call 811 at least 2 days before the excavation. They will contact utilities so that representatives can determine if...