South32 Hermosa Inc. safety activity

Employee was assisting with landing a tugger on the 3680 level. Two employees were pulling the tugger on to the level as it was lowered, two employees pulled from one side of the tugger and a third employee was pushing on the opposite side of the tugger. The tugger rolled over in the rigging, trapping and breaking the right arm of the employee between the tugger and the rigging.

Employee slipped and fell on their left knee while pouring a concrete slab. Injury was diagnosed as a sprain, and the employee was prescribed anti-inflammatory medication.

A programming issue resulted in the temporary suspension of all hoisting operations at the Main Shaft.

The injured employee was attempting to remove an O-ring seal while repairing a jackleg. The pick that the employee was using to remove the O-ring slipped and punctured the thumb on the employees gloved Left hand. The puncture became infected, incisions were made in the thumb in order to clean the wound, the employee also has been receiving IV antibiotics.

At approximately 12:54 am, an electrical component failure caused a power outage at the shaft pad.

At 09:28 hours, we experienced a loss of power from the generator plant, resulting in an immediate power outage at the shaft pad.

At approximately 9:30 am, an electrical component failure caused a power outage at the shaft pad.

At 2:43pm on 3/8/2026 both hoists lost power. 12 miners were working in the vent shaft, 7 miners were working in the main shaft. Power was re-established to the vent shaft at 3:31PM. Power was re-established to the main shaft at 3:45. No injuries sustained due to loss of power.

While the employee was cutting unistrut with a handheld band saw the saw unexpectedly shifted and contacted their left index finger resulting in a laceration. The employee received two stitches.