Materials excavated and stockpiled for future use are known as?

• A. Crystalline
• B. Gradation
• C. Backhauling
• D. Spoils

Answer: (D)

Materials excavated and stockpiled for future use are called spoils. In earthmoving, when you dig out soil or rock, some of that material isn’t needed right away, so you pile it on the site for later use as fill or for backfill. This kept-on-site material is referred to as spoil. It helps distinguish from material that will be hauled off or used immediately, or from terms describing the material’s size distribution or mineral structure.

Crystalline describes the mineral structure, which isn’t about how material is stored on site. Gradation refers to the particle size distribution, not to stockpiling for later use. Backhauling is the process of returning loaded trucks to the source or another site, not the practice of stockpiling excavated material. So, the term that fits excavated material kept on site for future use is spoils.