Site Clearance and Preparation: Clear the area of vegetation, debris, and any obstructions that might hinder excavation.

Here are six sequential steps for performing trench excavation:

1. Site Clearance and Preparation: Clear the area of vegetation, debris, and any obstructions that might hinder excavation.
2. Setting Out: Accurately mark the trench's lines and levels on the ground using pegs, string lines, and surveying equipment according to the design.
3. Initial Excavation: Begin digging the trench, either manually or with machinery, carefully following the marked lines and initial depth requirements.
4. Spoil Management: Place the excavated soil (spoil) at a safe distance from the trench edge to prevent it from falling back in and to maintain a clear working area.
5. Trench Support/Shoring: Install appropriate shoring, bracing, or trench boxes as excavation progresses, especially in unstable ground or deep trenches, to prevent wall collapse.
6. Final Trimming and Levelling: Trim the trench sides to the correct profile and ensure the trench bottom is accurately levelled to the specified depth and gradient.