RE: Owning Telfer + Havieron, following on from yesterday11 Mar 2024 16:54
@Freddie, we were told in TH webinar that decline work is recommencing in H2:
https://www.ggpchat.co.uk/viewtopic.php?t=896
* Okay that's a very interesting answer and slightly different from the one that you gave to it previously so I'm intrigued by that, okay Shaun let's turn to some more operational questions and here we go this is this is today's favourite question by a mile and it's not the Newmont question actually, it's the aquifer (Lower Contained Aquifer).
Alan, Dip, Wendy, Alan, Philip, Steve all ask about the aquifer, I mean basically they're saying has the lower aquifer been dewatered yet, I think you indicated it was still work in progress and if so when will drilling restart, will drilling restart and will the water cause any long-term problems? So I've sort of bundled all those questions into one really.
- no look it's good to unpack and I did try to talk this a little bit on the slide but let me augment that
- so the dewatering continues there's no change and the depressurization from memory there's six bore holes into it which is extracting that water
- look this has always expected to take us into the second half of the year when we first articulated it, there's no change as we sit here today I don't think I've received any information which suggests it would take longer or that the flow rates are higher
- at the margin I think you know we've received at least anecdotally pretty you know positive indications of where that's headed
- I think importantly though you know, we in parallel with that depressurization and dewatering process we gather data we gather flow rates, we get an understanding and then that needs to be effectively reassessed in a model to re-calibrate for the actual flow rates we're seeing from those bore holes as opposed to like the initial test bore holes
- so we think you know that's you know a positive to have more information, we think once we have that information we can recalibrate and give more definitive guidance but right now I don't see there being any changes to where we spoke you know when we first talked to the market about this I'll just say in the December quarter of 2023 where we see the dewatering and depressurization just continuing into that second half of the year and I don't see this being particularly different to how we tackled the upper contained aquifer or the middle contained aquifer
- the approach to the lower contained aquifer is exactly the same it's punch into it put some bore holes in depressurize, dewater, get flow rates down to their sustainable level set up the pumping infrastructure and then drive through it as you do with any mine that generates water which is most mines in Australia because aquifers are just a part of the landscape
- but you know the flow rates at this mine are not particularly high so I think you know timing is always something people have a focus on but I think from a technical risk this is a pretty understood feature in the Australian underg