When must the UMM give a notice of intention to seal a mine to an Inspector, ISHR or SSHR?

• A. At least 30 days before the UG mine, or part of it is sealed
• B. 7 days before sealing
• C. Immediately after sealing
• D. No notice required

Answer: (A)

The requirement being tested is that the UMM must give at least 30 days’ notice before sealing a mine or part of it. Sealing changes the ventilation and safety dynamics of the mine, so regulators need time to review the plan, ensure it meets safety standards, and coordinate any inspections or approvals with the Inspector, ISHR, or SSHR. This advance notice helps ensure miners’ safety during the sealing process and allows for necessary contingency arrangements, communications, and oversight. Shorter notice or no notice would limit regulator involvement and could create unsafe conditions, so the correct period is at least 30 days prior to sealing.