Bulldozer
CSI Division 31, Earthwork
A tracked piece of heavy equipment with a wide, flat blade mounted on the front, used to push and rough-grade large volumes of loose material across a site rather than to dig precisely in one spot.
Why it matters
A bulldozer's job is moving a lot of material roughly into place, clearing, rough grading, pushing spoil piles, fast, before more precise equipment, like a motor grader, comes in afterward to cut the exact final elevations the design actually calls for.
On a real project
Before a site's final grading begins, a bulldozer clears vegetation and pushes a large volume of loose fill roughly into place across the site, getting the ground close enough to final grade that a motor grader can efficiently finish the precise cuts afterward.
Who this matters most to
A Equipment Operator operates a bulldozer during the earliest, roughest phase of earthwork, before any of the site's more precise grading equipment gets involved.
Where this goes wrong
An operator pushes fill with a bulldozer without checking the site's grading plan, over-pushing material into an area the design actually calls for to stay lower. The error isn't caught until a surveyor checks elevations later, by which point the excess material has to be removed and relocated.