What is the name of the supplementary feature that involves the removal of soil?

The term that refers to the supplementary feature involving the removal of soil is "cut." In civil engineering and construction, a "cut" is the process of excavating or digging into the earth to lower the ground surface in a specified area. This is often necessary for creating foundations, roadways, or other structures where the existing ground elevation needs to be adjusted.

In contrast, "fill" involves adding soil to raise the ground level, while "excess" and "heap" are not standard terms used to describe features related to soil removal in construction. Therefore, the term "cut" accurately captures the concept of soil removal, emphasizing the action of taking material away from its original position to achieve a desired grade or elevation.