Which of the following best describes the role of grade stakes in field operations?

• A. They mark underground utilities.
• B. They measure rainfall.
• C. They indicate required elevations and slopes for grading and earthmoving work.
• D. They mark lunches.

Answer: (C)

Grade stakes are placed to communicate the finished surface the design requires. Each stake carries the target elevation at that point, and sometimes notes on the slope between stakes. This lets the operator set the equipment to the exact height and angle needed to achieve the correct grade, including the cross-slope for drainage. By following these stakes, the crew ensures the site is cut and filled to the design, with proper drainage and material balance. They aren’t used to mark utilities, measure rainfall, or indicate breaks like lunches.