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OSHA Trenching & Excavation Safety Checklist
Competent person daily inspection checklist based on 29 CFR 1926 Subpart P. Every item is mapped to its exact regulatory section. Check off each item as you inspect the excavation, add notes, and download a signed PDF for your project file. Saves your name and company so tomorrow's form starts faster.
What is a competent person under OSHA?
Per 29 CFR 1926.650(b), a competent person is “one who is capable of identifying existing and predictable hazards in the surroundings, or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them.”
OSHA does not mandate a specific certification or training course. The standard is capability-based: the person must have training in soil analysis, protective systems, and the requirements of Subpart P. And they must have management authorization to stop work immediately when conditions are unsafe. That second part matters. A competent person who cannot shut down the trench is not a competent person under the regulation.
When is a trenching inspection required?
Section 1926.651(k)(1) requires the competent person to inspect excavations:
- Before the start of each shift
- After every rainstorm
- After any other hazard-increasing occurrence — snowstorms, windstorms, thaws, earthquakes, temperature changes, vibration from nearby operations, or blasting
The inspection looks for evidence of cave-ins, failure of protective systems, hazardous atmospheres, or other hazardous conditions. If any are found, work must stop until the hazard is eliminated.
Soil classification quick reference
| Type | Strength | Max slope (H:V) | Examples |
|---|---|---|---|
| Stable Rock | N/A | Vertical (90°) | Granite, sandstone, limestone (massive, unfissured) |
| Type A | ≥ 1.5 tsf (144 kPa) | ¾:1 (53°) | Clay, silty clay, caliche. Disqualified if fissured, vibration, or previously disturbed. |
| Type B | 0.5–1.5 tsf (48–144 kPa) | 1:1 (45°) | Angular gravel, silt, previously disturbed Type A, dry unstable rock. |
| Type C | < 0.5 tsf (48 kPa) | 1½:1 (34°) | Sand, gravel, submerged soil, any soil from which water is freely seeping. |
Protective systems by depth
- Under 5 feet: No protective system required IF the competent person examines the ground and determines there is no indication of a potential cave-in. You still need the competent person on site to make that call.
- 5 to 20 feet: Sloping, benching, shoring, or shielding required. You can use the OSHA Appendix tables (no engineer needed) or a registered PE design.
- Over 20 feet: Must be designed by a registered professional engineer. No exceptions.
Top OSHA trenching citations
Trenching violations are among the most-cited and most-penalized in construction. The top citations, ranked by frequency:
- No protective system [1926.652(a)(1)] — the most common citation and the one that draws the largest penalties. Often classified as willful.
- No competent person or missing inspections [1926.651(k)] — either no one was designated or inspections were not performed and documented.
- No soil classification [Appendix A] — the competent person did not classify the soil before selecting a protective system.
- Spoil pile too close to edge [1926.651(j)(2)] — materials or equipment within 2 feet of the excavation edge.
- Inadequate access/egress [1926.651(c)(2)] — no ladder within 25 feet of lateral travel.
Frequently asked questions
Do I need this checklist for excavations under 5 feet?
A protective system (sloping, shoring, or shielding) is not required for excavations under 5 feet IF a competent person examines the ground and finds no indication of a potential cave-in. But you still need the competent person to make that determination and document it. This checklist helps you document that inspection regardless of depth.
Who qualifies as a competent person?
OSHA defines a competent person as someone "capable of identifying existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them." It is a capability-based standard, not a credential. You need knowledge of soil analysis, protective systems, and Subpart P requirements, plus management authorization to stop work if conditions are unsafe.
What is the difference between Type A, B, and C soil?
Type A is the strongest (unconfined compressive strength of 1.5 tons per square foot or more): clay, silty clay, hardpan. Maximum slope is 3/4:1 (53 degrees). Type B is mid-range (0.5 to 1.5 tsf): angular gravel, silt, previously disturbed soil. Maximum slope is 1:1 (45 degrees). Type C is the weakest (under 0.5 tsf): sand, gravel, submerged soil. Maximum slope is 1-1/2:1 (34 degrees). Benching is NOT allowed in Type C. Previously disturbed soil that would otherwise be Type A is automatically classified as Type B.
How often must trenches be inspected?
The competent person must inspect excavations before the start of each shift, after every rainstorm, and after any other hazard-increasing occurrence such as snowstorms, windstorms, thaws, earthquakes, or vibration from nearby operations. Inspections should look for evidence of cave-ins, failure of protective systems, hazardous atmospheres, or other hazardous conditions.
Is this checklist sufficient for an OSHA inspection?
This checklist covers every requirement in 29 CFR 1926 Subpart P, with each item mapped to its exact regulatory section. It is a thorough documentation tool. However, the checklist itself is not a substitute for the competent person's training, knowledge, and on-site judgment. OSHA will evaluate whether your competent person actually understands the hazards, not just whether they checked boxes.
What are the penalties for trenching violations?
Trenching is one of OSHA's most heavily enforced areas. Under the National Emphasis Program, fines for willful violations can reach $165,514 per violation (2025 limit). Serious violations can reach $16,551 each. In 2024, OSHA issued over 600 trenching citations totaling more than $10 million in penalties. Individual cases have exceeded $1.2 million. Beyond fines, criminal prosecution is possible if a fatality occurs.
Related free tools
- Daily Field Report Generator. Job site daily log with crew, equipment, weather, and work performed.
- Haul Ticket Generator. Print dump truck load tickets for the job.
- Excavation Volume Calculator. How much spoil comes out of the hole, how many truck loads.