An operator observes that the material in an aggregate stockpile is segregating, with larger rocks rolling to the base of the pile. Which loading technique is best suited to mitigate segregation and ensure a more uniform material blend when loading haul trucks?

Question: An operator observes that the material in an aggregate stockpile is segregating, with larger rocks rolling to the base of the pile. Which loading technique is best suited to mitigate segregation and ensure a more uniform material blend when loading haul trucks?

Answer options: ✅ Loading from the face of the stockpile, aiming for a vertical cut

• Loading only from the base where larger material has accumulated
• Pushing small amounts of material from different parts of the pile together before loading
• Loading primarily from the top of the stockpile, avoiding the sides

Correct answer: Loading from the face of the stockpile, aiming for a vertical cut

Explanation: Loading from the face of the stockpile with a vertical cut helps to retrieve a cross-section of the material, including both fines and coarser aggregates, thereby reducing segregation and ensuring a more consistent product as per OPSWA guidelines.