| http://www.w3.org/ns/prov#value | - 1) Operates power machinery, such as powered-shovel, stripping-shovel, scraper loader (mucking machine), or back-hoe (trench-excavating machine) to excavate and load material.2) Observes hand signals, grade stakes, and other markings when operating machines.3) Receives written or oral instructions to move or excavate material.4) Measures and verifies levels of rock or gravel, base, and other excav
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