MSHA training citations often trace back to a single upstream mistake: applying the wrong training rule for the mine. Part 46 and Part 48 both mandate miner training, but they cover different mines, set different hours, and impose different instructor requirements. Start by getting the "which rule" question right.

Which rule governs your mine

  • Part 46 (30 CFR Part 46) covers miners at surface mines that extract sand, gravel, surface stone, surface clay, colloidal phosphate, surface limestone, and shell dredging — the aggregate world. It's the more flexible, plan-based regime.
  • Part 48 covers everyone else: 48-A for underground miners (metal, nonmetal, and coal), and 48-B for surface metal and nonmetal miners not covered by Part 46. Part 48 is more prescriptive and requires MSHA-approved instructors.

If you run a surface sand-and-gravel operation, you're almost certainly Part 46. If you run an underground mine, you're Part 48-A. A surface metal mine is Part 48-B. Commodity and mine type decide it — not preference.

What each requires

Both regimes share a structure — new-miner training, refresher training, and task training — but the hours differ:

  • New miners. Part 46 requires at least 24 hours of new-miner training (with a portion before starting work and the rest within 60/90-day windows). Part 48 requires 40 hours for new underground miners and 24 hours for new surface miners.
  • Annual refresher. Both require at least 8 hours of refresher training every 12 months. Letting a refresher lapse is the single most common training finding — and it can pull a miner off the job.
  • Newly employed experienced miners and task training (training on the specific job and its equipment) are required under both.
  • Site-specific hazard awareness training is required for others on mine property, such as visitors and vendors who aren't miners.

Part 46 operations work from a written training plan; Part 48 operations use an approved plan and approved instructors.

Form 5000-23 is the proof

Whichever rule applies, training is documented on MSHA Form 5000-23, the certificate of training, recording the miner, the training type, hours, date, and the competent person or approved instructor who delivered it. When MSHA asks whether a miner was trained, the 5000-23 is the answer — so these records have to be complete, retained, and producible.

Contractors count too

At a mine that's roughly a third contractors, the training obligation doesn't stop at your own payroll. Contractors working on mine property need the appropriate training, and the operator has a real interest in verifying it before they're on site — which is where a gate check earns its keep.

Where it becomes a records problem

The rules are learnable; the hard part is staying current across a roster — catching a refresher before it lapses, proving task training on the right equipment, and verifying a contractor's credentials at the gate rather than after an incident. That's a tracking-and-expiry problem.

SE Worldwide tracks each miner's Part 46/48 training with refresher-deadline alerts before anyone lapses, stores the 5000-23 record, and — through contractor gating — can verify a contractor's training and clearances at site access, denying entry until they're qualified. See Mining & MSHA for how training ties into the credential gate.

This article is general information about health, safety, and environmental regulations, not legal or compliance advice. Rules change and apply differently by site — verify against the current regulation and your own obligations. See our Terms of Use.