Before any new structure can be built, the land requires excavation. Excavation is the process of removing earth, rock and other materials from a building site using machinery and tools. Excavation companies such as W.F. Botkin Construction Ltd., in Regina, offer more than just ground-breaking services. The excavation process can be multifaceted. It may involve earthwork, digging trenches and tunneling. Excavators work on more than just building sites. They work in mines and do exploration and environmental work as well as offer services in erosion control, culvert installation or replacement, and demolition.