Lucky Friday fire extinguished; production suspended through 2023
Lucky Friday Mine in Shoshone County.
JOSH McDONALD/NIBJ File
MULLAN — While the workforce may be returning, Hecla’s Lucky Friday Mine will not be in production for the remainder of 2023.
A fall of ground incident in mid-August resulted in a fire that suspended operations at the mine entirely.
Fall of ground is used to classify incidents related to unexpected rock mass movement or the uncontrolled release of rock in excavations due to gravity, pressure or rock bursts.
The incident occurred roughly 500 feet from the bottom of the active portion of the mine’s No. 2 shaft — the mine’s secondary egress — on an unused level station that had been under repair.
No one was underground or in any danger when the incident occurred
Hecla Mining Company announced Monday that the fire has been extinguished and normal ventilation has been established.
With those concerns now addressed, the returning workforce will be tasked with developing a new secondary egress to bypass the damaged portion of the shaft. The new egress will extend an existing ramp of 1,600 feet and install a 290-foot-long manway raise. Hecla anticipates that this work will suspend production for the remainder of 2023.
The mining industry follows a multi-staged cycle that applies to the lifespan of each specific mine, this includes exploration, design and planning, construction, production, and closure — with their decision Monday, the Lucky Friday is simply moving back into the construction phase.
A manway raise is a section of a raise or a vertical or near-vertical opening intended for travel between two levels of a mine.
The Mine Safety and Health Administration has specific laws and guidelines mines must follow concerning egress and escape ways.
Every mine is required to have two or more escape ways that are consistently maintained from the lowest levels of the mine all the way to the surface. However, when a new egress is being developed, a method of refuge must be provided for the work crews developing the second opening.
The company will look to its insurance in order to recoup costs from the suspended production, according to the release.
“The mine has produced 3 million ounces of silver as of the end of July 2023. Currently, the Company does not expect a material change to 2024 consolidated silver production guidance. The Company has property insurance with an underground sub-limit of $50 million and believes this policy will cover most of the property damage and business interruption, less the deductible.”