Endeavour’s Mana ramp failure: stability and production impacts for mine engineers
Reviewed by Tom Sullivan

First reported on MINING.com
30 Second Briefing
Endeavour Mining has suspended all underground production at the Mana gold mine in Burkina Faso after a section of the access ramp through the depleted Wona open pit subsided on 28 October, cutting access to the Dangouna and Aviera portals and triggering a full evacuation with no injuries. Ground-control specialists are assessing stability and portal remediation options, including a potential restart and acceleration via the remaining Wona portal and short-term reliance on nearby open-pit feed, with analysts estimating one to two quarters of disruption. Mana, which produced 173,000 oz. in 2025 and now contributes about 5–12% of Endeavour’s value and output, was already set to miss its 155,000–180,000 oz. guidance after earlier Siou underground depletion and delayed Bana Camp mining.
Technical Brief
- Incident occurred 28 October on the access road through the depleted Wona open pit.
- All three underground portals (Wona, Dangouna, Aviera) are shut while ground-control specialists complete stability assessments.
- July operations at Aviera had already paused to monitor a surface fracture in the Wona pit above.
- Current subsidence appears to be on a structure parallel to the July fracture, linkage still unconfirmed.
- Mana produced 68,000 oz. in H1 2026, down ~22% from 87,000 oz. year-on-year.
- Mine is 85% owned by Endeavour, 15% by Burkina Faso’s government, with underground-only production since 2024.
Our Take
Earlier coverage of Endeavour’s Q1 results showed EBITDA strength driven by higher realised gold prices despite lower volumes, which suggests the company has some price buffer to absorb the temporary production loss at Mana while remediation of the Wona entrance proceeds.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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