Banro Gold


Democratic Republic of Congo (DRC)




Scoping Study

Project description 

Twangiza Mining SA is a subsidiary of the Banro Corporation and the Twangiza Mine is remotely located in the South Kivu Province of the Democratic Republic of the Congo.

The Twangiza Mine operates open pits on several deposits and targets a 1.7 Mtpa throughput utilising a hybrid carbon-in-leach (CIL) circuit consisting of crushing, washing, agglomeration, spraying and gravity recovery of free gold. The primary objective of the Scoping Study was to present Banro with a conceptual understanding of the underground production potential, with associated operating and capital cost estimates. In order to determine underground mining inventory, the pit shells for the current operations had to be optimised and re-evaluated.

Services provided

A scoping study was conducted by DRA Global, responsible for the full scope of works including pit optimisation, final pit selection, mining method selection, potential mining method selection, mine design criteria, life of mine production and development schedule, mining/mineable inventory, mining costs (CAPEX and OPEX) and financial evaluation input parameters

Project highlights/challenges

Upon completion of the underground Scoping Study, DRA Global concluded that an underground mining operation can be sustained for six years with the current mineable inventory.