How would you estimate volumes for a site with multiple soil types along the alignment?

How would you estimate volumes for a site with multiple soil types along the alignment?

• A. Segment the site by soil type, calculate volumes for each zone separately, then sum results with corresponding density/compaction criteria.
• B. Average the soil types and compute a single volume.
• C. Only consider the first soil type encountered.
• D. Estimate volumes using only the cross-section method.

Answer: (D)