Endeavour Silver Restores Guanacevi Mill to Full Capacity Following Trunnion Replacement
Endeavour’s Guanaceví mill repairs are on schedule, but the outage does not extend the mine’s two-year reserve life.
Endeavour Silver Corp. (EDR) confirmed that the primary ball mill trunnion at its Guanaceví operation has been successfully repaired and the replacement installed, allowing processing to return to full capacity. The announcement serves as the closing chapter of a three-week outage first flagged on September 21, 2026, and explicitly cross-references the company’s September 22, 2026 release.
The release contains no tonnage, grade, cost, production figures, or financial impact data. All material information regarding the Guanaceví outage was previously absorbed by the market on September 22, when the plant went offline, and on October 8, when the company trimmed its full-year guidance to at or slightly below the low end of its range.
The timing of the repair aligns closely with the company’s initial estimates. Endeavour Silver guided on September 22 that repairs would take approximately three weeks. The period from September 21 to October 13 spans 22 days, meaning the company completed the maintenance task almost exactly within its stated window.
Endeavour Silver Corp. (EDR) confirmed on October 13 that repairs to its mill are complete and full capacity has been restored. The outage began on September 22, reducing regrind throughput to approximately 600 tonnes per day (tpd) from a normal level of roughly 1,100 tpd. The company stated that the necessary parts were in inventory, the repair cost was minimal, and the downtime was expected to last about three weeks.
Prior to the completion of repairs, Endeavour Silver reported third-quarter production on October 8, which included Guanaceví throughput of 89,722 tonnes (approximately 975 tpd) and a silver recovery rate of 94.9%. At that time, the company indicated that the mill would restart in the first half of October and trimmed its full-year guidance to at or slightly below the low end.
The estimated throughput loss from the outage, calculated as a shortfall of approximately 500 tpd for 21 days, amounts to roughly 10,500 tonnes. Based on a second-quarter grade of 235 grams per tonne (g/t) and a 94.9% recovery rate, this volume equates to approximately 75,000 ounces of silver. This figure represents less than 4% of quarterly silver production and is a fraction of the impact caused by the Terronera blockade. The estimated impact on fourth-quarter earnings is considered small and was already incorporated into the guidance provided on October 8.
Endeavour Silver Corp. (NYSE: EXK / TSX: EDR), a mid-tier silver producer headquartered in Vancouver, operates three mines. The Terronera mine in Jalisco, Mexico, has a 2,000 tpd design capacity and began commercial production on October 1, 2025. The Guanaceví mine in Durango, Mexico, operates at approximately 1,100 tpd. The Kolpa and Huachocolpa Uno mines in Huancavelica, Peru, were acquired on May 1, 2025, and expanded to a 2,500 tpd capacity, producing silver, lead, and zinc with by-product credits.
The company’s development and exploration pipeline includes the Pitarrilla project in Durango, Mexico, which is undergoing advanced exploration and an underground-focused feasibility study. Other projects in the pipeline include Parral in Chihuahua, Bruner in Nevada, USA, and Aida, which is in the exploration stage.
Endeavour Silver divested the Bolañitos mine to Guanajuato Silver for up to US$50M, consisting of US$40M upfront and US$10M contingent, with the transaction closing on January 15, 2026. The company has stated its ambition to become a leading senior silver producer.