OSHA defines an excavation as any man-made cut, cavity, trench, or depression in the Earth’s surface formed by earth removal.
A trench is defined as a narrow excavation (in relation to its length) made below the surface of the ground. In general, the depth of a trench is greater than its width, but the width of a trench (measured at the bottom) is not greater than 15 feet (4.6 m).
Course Number: TDS EXCAV1
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