Guides
Excavations and trenches
Updated March 20, 2026
Cave-ins and utility strikes are high-consequence events. Prevention blends soil understanding, protective systems, water control, and access rules.
Before you dig
Locate buried utilities and follow approved clearance methods. Mark zones and keep drawings current.
Assess soil type, depth, nearby loads (vehicles, stockpiles), and space for sloping or shoring.
Wall stability
Pick sloping, benching, or shoring based on analysis. Watch for cracks or water that signal movement.
Keep setback between trench edge and heavy equipment.
Water and conditions
Water reduces strength and complicates egress. Plan pumping, temporary drainage, and safe entry.
Reassess after heavy rain or freeze-thaw cycles.
Access and work inside
Access means must be stable and suited to conditions. Limit time under unprotected walls and keep clear comms with operators.
Earthwork/drainage lists help cover recurring field items.
Protection methods depend on context and regulations. Have competent people validate technical choices.
Related checklists
Heavy-work lists related to digging:
Common questions
- When is an engineer or stability study needed?
- It depends on depth, soil, loads, and methods. When uncertain, bring expertise rather than improvising.
- How do we avoid buried electrical contacts?
- Follow locate procedures, standoffs, and excavation rules near networks. Never assume a line is dead.
- What should we watch during the shift?
- Walls, water, traffic, signage, access, hoisting near the edge, and soil behavior after weather events.
- Does OK Sécurité cover earthwork?
- Yes—earthwork/excavation lists are available alongside other heavy-work checklists.