Before trench entry: receive the current assessment, protection and complete arrangements
Rain fell overnight at a townhouse utility trench. The morning crew sees water and excavated material near the edge, but yesterday's entry arrangement is still on the board. The foreman must return the current conditions for competent review before entry, rather than assume pumping and a shield will answer every hazard.
Check current conditions against the actual competent entry arrangement. CCOHS's trenching guidance identifies soil, water, nearby loads and other operations as relevant to protective-system decisions, alongside access, utilities, atmosphere and emergency needs. Apply the local law and required technical design. This lesson specifies no protective-system threshold, slope, spoil setback, access distance or pumping method. A visible shield is not proof that the entire trench or its approach is ready for entry.
Return the actual condition and receive the required entry basis
- Keep the proposed entry clear while identifying changes. Observe from a suitable safe position and give the responsible competent person the actual location, planned work and changed conditions. Do not enter an unresolved trench to measure it, retrieve a tool or get a photograph. Yesterday's accepted condition does not decide today's entry.
- Receive competent assessment and required protection. Confirm the actual soil and loading basis, suitable protective arrangement and applicable design or manufacturer information through the qualified process. Distinguish locating utilities from receiving every other hazard control. Do not choose a shield from depth alone, adjust shoring by trial or assume frozen-looking ground supports itself.
- Verify the complete access and work arrangement. Have required competent checks establish the actual protection, entry/exit, edge/loading restrictions and other task controls. Resolve water and relevant atmospheric or confined-space requirements through their proper assessed processes. Receive required training, communication and emergency arrangements. Pumping visible water does not alone prove stable walls, a suitable atmosphere or a ready rescue response; a ladder alone does not complete the decision.
- Retain current status and reassessment triggers. Inform the workers and affected equipment leads of the received area, restrictions and responsible contacts. Complete the actual required inspections and records. Changed conditions or concerns need appropriate reassessment with continuing protection and stopped affected entry.
Common mistakes
- Reusing yesterday's entry status after changed conditions.
- Entering an unresolved trench to investigate or retrieve items.
- Selecting protection from depth alone or pumping as complete clearance.
- Treating a shield, ladder or past incident-free entry as the whole decision.
Checklist
A received trench-entry arrangement retains
- Actual task, location and current changed conditions.
- Competent assessment and required technical protection basis.
- Verified access, relevant hazards and implemented controls.
- Trained workers, communication and prepared emergency arrangements.
- Current limits, required inspections and reassessment response.
Check your understanding
The visible water is gone, but the changed protection and soil conditions have not been reassessed. Is entry ready?
