Trench & Excavation Safety Toolbox Talk

Project: ____________ · Date: ____________ · Led by: ____________

A cubic yard of soil weighs about 3,000 pounds — the weight of a car. When a trench wall lets go, you're buried to the chest in a second, you can't inhale against the pressure, and the crew above has minutes, not hours. Trench deaths almost always happen in unprotected trenches — and they're almost always preventable.

Why it matters

Soil doesn't warn you. A trench that held all morning fails after lunch because of vibration, rain, or the spoil pile loading the edge. That's why the law doesn't ask whether the trench looks stable — it demands protection.

Key points — cover all of these

1. 5 feet deep or more = cave-in protection, period: slope it, bench it, shore it, or shield it with a trench box. Under 5 feet still needs a competent-person call.
2. The competent person inspects the excavation daily and after every rain, thaw, or vibration change — before anyone enters.
3. Keep spoil piles, materials, and equipment at least 2 feet back from the edge — and remember equipment loads the wall from farther out.
4. Ladder, steps, or ramp within 25 feet of every worker in a trench 4 feet or deeper.
5. Call 811 before digging and treat every locate as approximate — hand-dig near marked utilities.
6. Water in the trench changes everything. Accumulating water = out of the trench until the competent person re-evaluates.

Ask the crew

The answers are the point — this is where today's real hazards surface.

• Who is the competent person for our excavation, and when was the last documented inspection?
• Is our access ladder actually within 25 feet of where people are working — right now?
• What changed since yesterday — rain, traffic vibration, deeper cut — that should trigger a re-check?

The one thing today

Nobody enters a trench 5 feet or deeper today unless protection is in and inspected.

Reference: OSHA 29 CFR 1926.650–652 (Subpart P — excavations)

Attendee sign-in