In Plain English
Quick Answer
All the digging, moving, and shaping of soil and rock needed to prepare a site for construction.
Definition
Definition
All construction activities involving moving, shaping, and compacting soil, rock, or other ground materials to create the desired landforms, grades, and sub-base conditions for a project. Earthwork includes clearing, grubbing, excavation, grading, fill placement, and compaction. Earthwork quantities are measured in cubic yards and priced by unit volume moved.
Context
Why It Matters in Bidding
Earthwork is often the single largest source of estimating risk on a site project because quantities depend on subsurface conditions an estimator cannot fully see at bid time. A small error in the cut-and-fill balance or an unexpected rock layer can swing the bid by tens of thousands of dollars, and unbalanced sites that require import or export of material carry hauling and disposal costs that crush thin margins.
Example
Example
Reviewing a grading plan, an estimator runs a cut-and-fill takeoff, finds the site is 4,000 cubic yards short of balance, and adds a line item for imported structural fill plus trucking before submitting the sitework bid.
See Also
Related Terms
FAQ
Questions Contractors Ask
How do estimators measure earthwork quantities for a bid?
Estimators compare existing and proposed grade surfaces, usually with takeoff software that calculates cut and fill volumes between the two. The net difference shows whether the site balances or needs import or export. Soil borings and a swell-and-shrinkage factor are applied so loose hauled volume matches compacted in-place volume.
Why is earthwork considered a high-risk bid item?
Subsurface conditions are largely hidden at bid time, so unexpected rock, groundwater, unsuitable soils, or inaccurate survey data can drastically change quantities and production rates. Because earthwork is priced by volume moved, even a modest quantity miss multiplies across thousands of cubic yards, making it a frequent source of cost overruns and change-order disputes.
What is the difference between balanced and unbalanced earthwork sites?
A balanced site has roughly equal cut and fill, so excavated material is reused on-site with minimal hauling. An unbalanced site has surplus cut needing export or a fill deficit needing import. Unbalanced conditions add trucking, disposal, or borrow costs, which estimators must capture as separate line items to protect margin.
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