rehab, track, shaft. -- present drifts are 8 X 8. The 500 dollar cost sounds a tad high. I remember we charged out 350 a foot, and that was track, pipe and profit included. You can probably do it for about 250 a foot in house.
Your only costs are dynamite, labour, bits, fuse, air, water, track, pipe and timber.
3 shifts, or 6 man shifts should give you 8 feet of advance no problemo. That is 1500 labour. Dynamite and fuse is 150 at most, bits about 100, track and pipe about 500, timber/rockbolts about 240. All other overhead and support about 300. Maintenance and costs for equipment about 100 let's say. That is 2900 for 8 feet of 8' X 8'. $363/foot at the outside hmmmmm.. You could do better with trackless and jumbo.
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