Why is grade control important in earthwork?

• A. Reduces project budget.
• B. Ensures finished surface elevations and slopes meet the design.
• C. Increases excavation rate.
• D. Eliminates the need for testing.

Answer: (B)

Grade control is about hitting the designed elevations and slopes as earthwork is placed. By maintaining accurate grade, the finished surface aligns with the plans, which ensures proper drainage, correct cross-slopes for pavement, and overall performance of the site. Small discrepancies don’t accumulate into large problems, reducing the chances of ponding, drainage failures, or costly rework. It also helps the subgrade and backfill meet required limits for stability and compaction.

While better grade control can contribute to lower costs by avoiding rework, it is not inherently a budget tool. It does not guarantee a faster excavation rate, since precise checks can slow progress. And it does not eliminate the need for testing or verification; field checks and tests are still needed to confirm the grades meet the design.