Which class applies to mines employing not less than 150 underground and 250 surface personnel?

Which class applies to mines employing not less than 150 underground and 250 surface personnel?

• A. Class A
• B. Class B
• C. Class C
• D. Class D

Answer: (A)

Mine safety classifications scale with workforce size, so larger mines require more stringent controls. When a mine employs not less than 150 underground and 250 surface personnel, it fits the highest category, which anticipates the greatest level of oversight, training, emergency planning, and safety requirements. This level is designed to address the increased complexity and risk that come with a larger operation, ensuring safety measures keep pace with the size of the workforce. The other categories apply to smaller operations with lower staffing, so they don’t meet these thresholds. Therefore, the most stringent category is the correct choice for this staffing level.

Mine safety classifications scale with workforce size, so larger mines require more stringent controls. When a mine employs not less than 150 underground and 250 surface personnel, it fits the highest category, which anticipates the greatest level of oversight, training, emergency planning, and safety requirements. This level is designed to address the increased complexity and risk that come with a larger operation, ensuring safety measures keep pace with the size of the workforce. The other categories apply to smaller operations with lower staffing, so they don’t meet these thresholds. Therefore, the most stringent category is the correct choice for this staffing level.