Endeavour’s Mana ramp failure: stability and production impacts for mine engineers - Geomechanics.io

AI desk brief

Endeavour Mining has suspended all underground production at its 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 forcing a full evacuation with no injuries. Ground-control specialists are assessing stability and remediation options; analysts estimate one to two quarters of disruption, with short-term reliance potentially shifting to the remaining Wona portal and nearby open-pit feed.

Mana produced 173,000 oz in 2025 and 68,000 oz in H1 2026, down about 22% year on year, and was already expected to miss 155,000-180,000 oz guidance after earlier Siou underground depletion and delayed Bana Camp mining. The mine contributes roughly 5-12% of Endeavour’s value and output, so the outage is a modest but tangible bullish supply-side event for gold.