Cost of decline reply from Denver Harris at Sandstorm6 May 2020 19:10
Dear XX XXX
'I was able to speak with one of our mining engineers about your question. It is difficult to answer with specific numbers because the cost depends very much on the size and length of the decline, as well as how good/bad the ground conditions are.
My colleague suggested that a typical size is 4.5 metres by 4.5 metres and most underground ramps are driven at a 7:1 incline. He said that using A$6,000 per metre as an estimate to drive the decline is a reasonable assumption.
Denver'
Sandstorm