Trenching and excavation work; it’s the starting point of most projects. Before you dig, there’s a lot you need to know. The most common type of hazard encountered in trenching and excavation work is the trench cave-in, but there are other hazards that may not be as well known. Basic knowledge of concepts such as soil types, soil testing, types of trench collapses, trench protection, and safe work practices is what we need to be focused on before entering a trench.