A construction worker is part of a crew of laborers who perform a broad range of tasks on job sites. Tasks range in difficulty from relatively easy to potentially hazardous, and may include include preparing construction sites for new projects by removing debris from the area, backfilling holes, and, when necessary, digging trenches. Once a project is underway, construction workers build scaffolding, barricades, bracing, and other temporary structures. Following construction and completion, they take apart these structures as they are no longer needed. Construction workers operate and maintain equipment and machines, like concrete mixers, jackhammers, saws, drills, and more.