On a mass diagram, the region above the zero line indicates which?

On a mass diagram, the region above the zero line indicates which?

• A. Waste
• B. Borrow
• C. Fill
• D. Cut

Answer: (A)

In a mass haul diagram, the zero line is the balance point between cut and fill. The region above that line means more earth has been cut than can be used for fill up to that point, so there’s a surplus of material that must be disposed of off-site as waste. The area below the line indicates a deficit of material to meet fill requirements, which would require borrowing material from elsewhere. So the portion above the zero line corresponds to waste.

In a mass haul diagram, the zero line is the balance point between cut and fill. The region above that line means more earth has been cut than can be used for fill up to that point, so there’s a surplus of material that must be disposed of off-site as waste. The area below the line indicates a deficit of material to meet fill requirements, which would require borrowing material from elsewhere. So the portion above the zero line corresponds to waste.