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Sitework & Earthworkaka: final gradingaka: finish grading

Fine Grading

In Plain English

The final, precise shaping of the ground surface to exact design elevations, done after the rough grading work is complete.

Definition

The final grading operation that establishes precise design elevations and slopes after rough grading is complete, performed to close tolerances (typically within 0.1 feet or less). Fine grading prepares the subgrade surface for paving, flatwork, landscaping, or building construction. It is typically performed with a motor grader or small dozer equipped with laser or GPS grade control.

Why It Matters in Bidding

Fine grading sets the tight elevation tolerances that paving, flatwork, and foundations depend on, so under- or over-cut subgrade can blow concrete or asphalt yields and create drainage problems that owners reject. In a bid, estimators must price the right grade-control equipment and crew productivity, since GPS or laser machine control changes the labor hours dramatically versus hand grading.

Example

The site superintendent runs a GPS-guided motor grader to bring the parking-lot subgrade within a tenth of a foot of design before the paving sub mobilizes, avoiding extra base rock to make up low spots.

Related Terms

Rough GradingGradingSubgradeFinish Grade

Frequently Asked Questions

Rough grading moves the bulk of material to get the site within roughly a few tenths of design grade. Fine grading then trims the surface to precise final elevations and slopes within tight tolerances, producing the smooth, uniform subgrade required directly beneath pavement, slabs, or landscaping.
Fine grading is held to close tolerances, commonly within about a tenth of a foot or tighter depending on the surface it supports. Pavement and structural slabs demand the strictest control, which is why crews rely on laser or GPS machine guidance rather than relying solely on grade stakes and hand checks.
It drives both equipment selection and crew productivity. Pricing automated machine control raises equipment cost but cuts labor hours and rework, while tight tolerances under paving reduce the risk of overbuilding base material. Estimators should confirm specified tolerances and whether grade control is owner-provided or carried by the grading sub.

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