MSHA Part 46 vs. Part 48: Understanding Training Requirements

By MineForce LLC · Published October 21, 2026 · About the principal

The choice between MSHA Part 46 and Part 48 is not simply a choice between surface and underground mining. Applicability depends on the operation described in the rules. Establish the correct framework before reviewing a training plan or relying on a training record.

Part 46 covers specified surface nonmetal operations

Part 46 applies to the operations identified in its scope, including sand, gravel, surface stone, surface clay, colloidal phosphate, surface limestone and shell dredging. It should not be applied to a surface metal mine solely because work occurs above ground. Consult section 46.1 and official MSHA guidance when the classification is uncertain.

Part 48 covers other operations within its scope

Part 48 includes underground mines and other covered operations outside Part 46. Its subparts distinguish underground work from surface mines and surface areas of underground mines. A surface facility associated with an underground mine therefore needs careful classification rather than an automatic Part 46 assumption.

Plan and instructor requirements differ

Part 48 includes MSHA approval requirements for training plans and instructors. Under Part 46, a plan containing the required minimum information is considered approved; plans that do not meet those provisions require the specified MSHA approval process. Part 46 instructor competence is addressed differently. A consultant’s review does not itself confer required agency approval.

Check whether the records fit current work

• Identify the operator, mine, work activities and applicable framework.
• Compare the plan with current roles, tasks, equipment and training responsibilities.
• Check the required record elements and the evidence supporting completion.
• Review contractor arrangements and site-specific hazard-awareness needs.
• Identify changes requiring plan updates, further training or agency clarification.

Required training type, timing and records depend on the rule and individual circumstances. Do not infer that a certificate from one setting resolves every obligation at another. Read the applicable provisions rather than applying one universal hours summary to all personnel.

Training review and training delivery are different services

MineForce offers consulting on applicable plans, records and potential compliance gaps. David Pennington’s MSHA instructor experience is part of his professional background. MineForce does not advertise public MSHA training classes, and an independent review does not relieve the operator of its training responsibilities.

General technical information, not a site-specific compliance determination. Review scope, mine conditions and applicable requirements must be established for each engagement.