TopGun Excavations work can be categorised in various ways. The first classification is reliant on the kind of material that is being excavated and the second relies upon the reason for the excavation. When the excavation is classified by the material type, accurately identifying the material is essential for minimizing expenses and keeping away any technical problems from happening further down the track.

Excavation procedures can also be categorised based on the type of topsoil, rock, earth, or muck that needs to be dug out, as well as unclassified excavations where there is a blend of earth-based materials present. It is important to identify the excavation material, as it is a key part of choosing the right equipment, and the right place to dispose of the surplus soils. However, when classifying an excavation by its purpose, projects would be defined depending on the ultimate objective of the project works (e.g. roadways, drainage etc)