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Operator
Thank you for standing by. This is the conference operator. Welcome to the Equinox Gold's first-quarter 2024 results and corporate update. As a reminder, all participants are in listen-only mode and the conference is being recorded. (Operator Instructions)
I would now like to turn the conference over to Rhylin Bailey, Vice President, Investor Relations for Equinox Gold. Please go ahead.
Rhylin Bailey - Vice President, Investor Relations
Thank you, Kyle, and thank you, everybody, for joining us this morning. We will, of course, be making a number of forward-looking statements today. So, please do visit our website, SEDAR and EDGAR to view the rest of our continuous disclosure documents.
I will now turn the conference call over to our President and CEO, Greg Smith.
Gregory Smith - President, Chief Executive Officer
Thanks, Rhylin, good morning and thanks, everyone, for joining the call today. On the line with me is our COO, Doug Reddy; our CFO, Peter Hardie; our EVP of Exploration, Scott Heffernan; and our VP of Investor Relations, Rhylin Bailey. Again today, we are discussing Equinox Gold's 2024 first-quarter financial and operating results.
Today is also the first opportunity we've had to publicly discuss our recently announced transaction to consolidate ownership of the Greenstone mine in Ontario. So, I'm going to start with that and then move on to the first quarter results. So, as most of you know, we already own 60% of the Greenstone mine with our joint venture partner, Orion Mine Finance owning the other 40%.
On April 23rd, we announced that we are acquiring Orion's 40% interest. This transaction delivers full ownership of the Greenstone mine to Equinox Gold and consolidates ownership of one of the largest and highest grade open pit gold mines of scale in Canada. The total acquisition cost is $995 million in cash and shares, $250 million will be satisfied through the issue of 42 million common shares of Equinox Gold to Orion.
The remaining $745 million will be paid in cash, source from a new $500 million three-year term loan. The proceeds from the recently completed $299 million equity offering of common shares of Equinox Gold and a deferred payment of $40 million due at the end of this year. We expect the transaction to close in the near term.
So, I want to take the opportunity now to thank Orion Mine Finance and their team for being great partners on the development of this mine and to welcome them as meaningful shareholders of Equinox Gold. As existing owners of Greenstone, we know this mine well and consider this a very logical and attractive transaction for Equinox.
It is accretive to our cash flow and EBITDA, delivering substantial near-term value. It increases the company's average mine life reserves and production, while lowering our consolidated per ounce operating costs. It enhances our strategic flexibility and operational control and decision making. And it increases the company's exposure to the top-tier mining jurisdiction of Ontario and gives us 100% ownership of a rare long life, high-quality mine of scale.
Based on analyst consensus estimates, you can see on this slide that our consolidated production will immediately increase this year as Greenstone starts commercial operations. And over the next two years, we start to see our overall cost decrease with the increased exposure to the lower cost production from the Greenstone mine.
You can also see the meaningful increase to our EBITDA, our earnings before interest tax and depreciation and amortization. This headline increase in EBITDA also results in an increase of EBITDA on a per share basis, making this an accretive transaction for Equinox in the near term. Also based on consensus net asset values for our mining and development assets, you can see the substantial increase in overall exposure to Canada, which will exceed 52% with the completion of this consolidation.
And this is specifically exposure to Ontario, which is one of the lowest risk operating jurisdictions globally for mining. Our current production guidance for this year is currently 660,000 to 750,000 ounces. On closing of the consolidation of Greenstone, our consolidated pro forma guidance increases to a midpoint of 780,000 ounces with a corresponding decrease to our consolidated cash costs and all-in sustaining costs. We will formally update our 2024 guidance once we have closed the transaction.
So, where does this take us? We still got our seven producing mines across Brazil, Mexico and the United States. And of course, we'll have production in Canada in just a couple of weeks. Pro forma, we'll see a production bump of around 160,000 ounces per year by owning 100% of Greenstone now, which we expect to be in commercial production in Q3 this year.
Our production is supported by a large gold endowment, including pro forma the transaction, 19 million ounces in reserves and an additional 17 million ounces in measured and indicated resources. And with this consolidation of Greenstone, we've taken another important step toward achieving our vision of 1 million ounces of gold production per year.
I'll now give a quick overview of the first quarter results and then I'll turn the call over to Pete and Doug for more details. During the first quarter, we produced just under 112,000 ounces of gold and sold just over 116,000 ounces. Cash cost per ounce sold was 1,567 per ounce, and all-in sustaining cost per ounce sold was 1,950 per ounce.
Q1 is seasonally and typically a lower production quarter for us. This Q1 was a good quarter with Los Filos and Aurizona currently are both our largest mines, both exceeding plan for at the first quarter and setting us up well to achieve our fiscal 2024 guidance. We did report in April that we have experienced some geotechnical issues in the south wall of the Piaba open pit at Aurizona and have temporarily suspended mining in Piaba.
To mitigate this, we process low grade stockpiled ore through April, and we have accelerated mining in the new Tatajuba open pit. We expect first ore from Tatajuba in early June. We are continuing to assess the impact this might have on production from Aurizona for this year, but at this stage, we're not revising our consolidated guidance.
Our safety performance this quarter was good. Six of our sites had no lost time incidents and our 12-month rolling total recordable injury frequency rate stands at 1.55 per million hours worked. We had no significant environmental incidents in Q1, and shortly following this call, we will publish our fiscal 2023 ESG report, which this year is a consolidation of our ESG, climate, tailings and water stewardship reports into one comprehensive document.
It will be available on our website, and I'd encourage everyone on this call to check it out. It is an excellent report. On the development side, commissioning of Greenstone remained a key focus for the company during the first quarter, and we were pleased to report in early April that we had started processing material through the full grinding circuit.
Commissioning is progressing well, and we're looking forward to our first gold pour at Greenstone later this month. So, this is coming very soon. Doug will have more details on the current status of Greenstone later in the call. We are also advanced. So, we also did advance the permitting of our planned expansion at Castle Mountain, which would increase production at Castle Mountain to over 200,000 ounces of gold per year.
We recently received the notice of completion from the Federal Bureau of Land Management and are now working with them to complete the notice of intent, which will formally kicked off permitting for the expansion and we expect that to finish up sometime in mid 2026.
At our Aurizona mine in Brazil, we also plan to start development of the underground portal at Piaba later this year. And as mentioned earlier, we have accelerated the development of the new Tatajuba open pit with mining commencing in May and first ore expected in June.
With that, I'll turn it over to Pete to discuss our financial results.
Peter Hardie - Chief Financial Officer
Thanks, Greg. We're now on slide 10 in the presentation. We sold 117,000 ounces of gold as Greg mentioned, at an average realized price of 2,066 per ounce revenues of $241 million. Income from mine operations was $11 million compared to $14 million in Q1 2023. We had $184 million in operating expenses in Q1 2024, which is a decrease from the immediate prior quarter of Q4 last year when we experienced $198 million of expenses, but an increase from Q1 2023's $172 million.
On a per unit basis, we had cash costs of $1,567 per ounce compared to $1,346 per ounce in Q1 2023. The difference is primarily driven by lower production at Los Filos, which Doug will discuss in a minute and higher costs at Fazenda and Santa Luz, offset partially by the positive impact of higher production at Mesquite.
Our all-in sustaining cost per ounce for Q1 2024 was $1,950 compared to $1,658 in Q1 last year. The change in AISC is the result of the same factors that affected cash costs. And in addition, we spent about $12 million more on sustaining capital in Q1 this year versus Q1 last year, which was primarily on deferred stripping.
Our EBITDA in Q1 2024 was $28 million or $52 million on an adjusted basis. We had a net loss of $43 million for the quarter for a basic loss per share of $0.13. On an adjusted basis, we had a net loss of $14 million or $0.04 per share. Cash flow from operations before changes in noncash working capital was $48 million or $0.15 a share.
With respect to our sustaining spend, we spent $32 million during the quarter. In April, in addition to announcing the transaction to consolidate our ownership of Greenstone. We also extended each of the $140 million Mubadala convertible notes by six months mature in October 2024, and September 2025.
We also repriced Mubadala note that matures next year to convert at $6.50 per share from the original conversion price of $7.80 per share. The purpose of extending those notes was to move the maturity of the 2024 note outside of the Greenstone commissioning period.
Moving to slide 11. Please note these figures are as at March 31st and not pro forma. In terms of liquidity and capital position, we ended the quarter with $125 million of unrestricted cash. At March 31st, the company had issued a cumulative total of $22.5 million shares under the ATM program for total gross proceeds of $100 million.
As such, the ATM is now fully utilized and we have not renewed it. We expect to retain about $75 million of cash from the recent equity offering after making the initial $955 million payment to Orion to acquire the remaining 40% of Greenstone.
With regards to Greenstone, a total of $1.3 billion has been spent on this project to date. Greenstone was built during a difficult macro economic environment. Equinox Gold successfully navigated that environment by nimble management, while also benefiting from USD strength compared to the Canadian dollar. We expect Greenstone to start producing gold this month and to quickly begin generating gold credits.
We ultimately expect Greenstone to achieve commercial production largely on budget and expect to fund any pre-commercial expenditures through our treasury and operating cash flow. At the end of Q1, we also have $165 million available to draw on our revolving credit facility. Additionally, we have $100 million on our accordion feature of the revolving credit facility that remains available and undrawn.
We have other levers, including our $100 million investment portfolio. As Equinox Gold depends in part on operating cash flow to fund Greenstone, we have gold hedges in place to ensure minimum gold price and secure the related cash flow and a portion of our gold sales during Greenstone commissioning and ramp-up.
At April 1, 2024, the company had colors on 112,000 ounces of gold for April to December with a floor of $2,008 per ounce and a ceiling of $2,221 per ounce. On 112,000 ounces hedged, 64,000 are in Q2, 33,000 in Q3 and, 15,000 in Q4.
I'll also note that the $500 million term loan we expect to execute on close of the Greenstone final acquisition includes a requirement to hedge a minimum of 15% of production over 36 months from close of the transaction. Management has one month to put the hedges in place after close which we expect to occur shortly.
We're now on slide 12. For the past few years that Equinox Gold, we've been acquiring and building mines and have been using debt as one of the funding methods for doing so, including an additional $500 million term loan that we'll use to consolidate the Greenstone ownership.
This slide demonstrates Equinox Gold's historical leverage as measured by net debt to EBITDA ratio from Q1 2020 through Q4 2023 and pro forma leverage through 2026 as per analyst consensus. The general trend we see is that leverage in the company increased as acquisitions were completed and as mines are being built.
There's a natural consequence of using debt as one lever for funding acquisitions and construction. Leverage peaked in Q1 2020, a few months after construction of Aurizona was completed and again in late 2022 is construction of Greenstone was ongoing and construction of the Santa Luz mine was completed.
Another trend we see in this chart is that as mines are commissioned, ramped up, the leverage decreases as the Equinox Gold has the benefit of the EBITDA and cash flow generated by the new mine. Greenstone is expected to be a high-margin producer.
On the right side of the chart, we see that based on analyst consensus figures, leverage is expected to quickly decrease as green zone EBITDA is generated and we used cash flow to reduce debt. Ideally, we want leverage during non-construction periods to be below 1 time and expect to achieve that in late 2025.
With completion of Greenstone construction and pending gold production, management's goal is to reduce Equinox Gold's leverage as quickly as possible through the generation of operating cash flow from Greenstone and the other mines.
With that, I will turn it over to Doug for a review of the operations.
Doug Reddy - Chief Operating Officer
Thanks, Pete. We're now on slide 13 of the presentation. At the Mesquite mine, gold production was 22,000 ounces with an all-in sustaining cost of $1,188 per ounce. The mine benefited from lower fuel consumption and pricing in Q1.
Stripping continued in the ginger pit. That was a new discovery that was brought into the mine plan last year. Or from ginger comes onto leach pad in Q1 of 2025. Mining in Q1, we saw the completion of the Vista East Pit and additional ore was continuing to come as a positive reconciliation and the Don Juan pit. For the rest of 2024, production is mostly from draw down of the leach pad inventories that have been accumulated in the latter part of 2023.
Also from sites look, leaching and leaching of the additional ore that's been coming from the current mining. We also completed the drilling program that was designed to expand the gender deposit that was completed in Q1. At Castle Mountain, production was 4,700 ounces at a high all-in sustaining cost of $2,600 per ounce.
Phase one is a small operation that involves mining and processing of low-grade mineralized dump material. This material needs to be removed from the old open pits and anticipation of mining higher grade in situ ore during the Phase 2 expansion. Most of the material in Q1 was crushed and agglomerated comprising 85% of the award that was being stacked.
We continue to work on cost reductions at Castle Mountain. Phase 2, as Greg noted earlier, we did receive a notice of completion from BLM for our permit application and the permitting process continues to work towards the notice of intent. At Los Filos production was 24,000 ounces with a own sustaining cost of $2,424 per ounce, but this should be better in H2.
In this quarter, the crusher was suspended, while a planned move of the conveyor was being completed. During this time, production was only from run of mine ore and draw down of the leach pad inventories that have been accumulated in H2 2023. Ounces produced were higher than planned for the quarter. Or for crushing, which is the higher-grade ore was stockpiled during Q1 and is being processed in Q2. That material will be under leach in late Q2 and Q3.
Operational improvements on the mining side that were reported in the previous quarter, continued into 2024, especially in the open pit, where we also had positive reconciliations for the Los Filos and Guadalupe open pits. Los Filos underground production was steady, but in the mining in a new area in the South mine near is called Diego's, that was slow for production as it was in the start-up phase with a new contractor.
We do see that recovering during the subsequent quarters and commenced the full speed of production, Diego's. We have continued our dialogue with our community partners on new agreements. And these agreements are so that we can ensure long-term economic viability and stability for the Los Filos mine.
Moving on to the next page. In Brazil, at the Aurizona mine, production was 23,800 ounces with an all-in sustaining cost of $1,973 per ounce. Mining was focused on waste and the majority of the ore that was processed was from the stockpile, which is normal during the rainy season.
The Vene 2 tailing storage facility was commissioned in Q1 and is now the deposition area for our tailings. And we commenced the closure of the Vene 1 tailings storage facility. We have had exceptional rain year to date, highest rainfall in the life of the horizontal mine. We suspended mining in the Piaba open pit after geotechnical instability led to displacement of material in two locations in the south wall.
As we reported, there were no injuries, no damage to equipment or infrastructure and no environmental damage. We continue working on remediation planning and activities with safety being the top priority. In late April, we commenced mining activities at the new Tatajuba open pit, and anticipate ore coming in June from there to feed the process plan.
However, we do expect planned to be idle for four to six weeks. At the present, the mine production was 14,400 ounces and the all-in sustaining cost was $1,745 per ounce. Plant feed is currently 45% from open-pit and 55% from underground. In the open pit, we changed the mining contractor in Q1 and this impacted the adherence to the mine plan.
The new open pit contractor is now fully mobilized and this catching up. In the underground mine, the development was behind and this delayed access to some of the higher grade stopes. Development rates have increased in April, and we look to catching up on mining in both open pit and underground in H2 of 2024.
Drilling programs continue to replace reserves in the underground at Fazenda. At RDM, gold production was 10,900 ounces and the all-in sustaining cost was $1,800 per ounce. We changed the rental mining fleet during Q1. This is rental equipment that is operated by our team. How we also received the permit for the dry stack tailings area.
We'll be implementing that method of tailings management in the second half of this year. At Santa Luz, production was 11,836 ounces, and the all-in sustaining cost was $2,519 per ounce. Plant throughput overall recoveries were impacted by several modifications and changes that were being made to the process plant.
Elution efficiency and the number of elution was improved. Electrowinning and detox were also improved. These changes led to recovery improvements by April that we're now seeing and on average in April, 68.5% recovery. In Q2 and Q3, we will be working on the installation of a new trunnion, which should enable up to a 10% increase in throughput in the SAG mill, and also a declining circuit, and that will be to reduce the total organic carbon content and improved overall gold recovery by up to 6%. So, the objective here is to achieve recoveries of around 73% or higher for the second half of the year.
Moving on to page 15. At Greenstone, we're not commissioning and we've been processing ore since April 6. Primary and secondary crushing and the HPGR circuit are performing well. We've been running each ball mill with full load and have gradually ramped up to running them in tandem. The gravity circuit and the ILR or intensive leach reactor are an operation.
The stockpile and broken ore in the pit at April 30th was over 1.9 million tonnes. The tailings facility is permitted and in use. And by the end of April, we were operating at about 40% to 50% of design capacity and continued to ramp up in this last week. Naturally, there are some stoppages while the team resolves issues and adjust the equipment during this commissioning period, but the first gold pour is on track for this month.
With that, I'll hand it back to Greg.
Gregory Smith - President, Chief Executive Officer
Thanks, Doug. I'm going to finish off with just a few final comments on the Greenstone mine, given the recent transaction announcement. So, 400,000 ounces of gold production per year on average over the first five years. Greenstone really is a world-class generational gold mine that will be Equinox Gold's largest longest life and lowest cost mine once ramped up to commercial operations over the coming months.
We feel extremely privileged to have seen this asset go from acquisition through construction into commissioning and now consolidated 100% into our company. Greenstone is a rare asset. It will be one of Canada's largest gold mines, and we'll be one of Canada's highest grade open pit gold mines of scale.
It will also be one of the very few gold mines of this size globally that is not held by a major mining company. Greenstone will also be a low cost gold mine with cash costs expected to be in the lowest quartile of gold mines globally. Achieving production at Greenstone will significantly reduce our operating costs and meaningfully increased our cash flow.
There is substantial opportunity to extend more than 14 year mine life that is currently defined at Greenstone. We already are seeing increased mine life through drilling that we have done in the southeast end of the open pit, and there's opportunity to further expand the open pit to the west.
There's also a substantial underground resource at Greenstone of over 4 million ounces in all categories, and we will start to assess and ultimately surface as value once we have the mine in commercial production. Finally, with this transaction, we will consolidate ownership of mineral claims over a highly prospective 100 kilometer trend to the west of the Greenstone mine with multiple near mine gold deposits and a number of targets across the trend. This includes the Burke bank deposit, which already has over 680,000 high grade gold ounces in resource.
To conclude with the consolidation and commissioning of Greenstone, we'll be substantially increasing our annual production into historically strong gold prices and into a bullish macro outlook for gold with the potential for decreasing interest rates later this year. We will now have also increased exposure to Canada and to low-cost production from a significant mine at the beginning of its mine life, decreasing our operating costs and increasing our EBITDA and cash flow. And we have a production profile and portfolio down elevates Equinox Gold to a large gold producer.
I'm going to stop there and pass back to Rhylin for Q&A.
Rhylin Bailey - Vice President, Investor Relations
Thanks, Greg. Operator, can you please remind people how to ask a question?
Operator
(Operator Instructions)
Rhylin Bailey - Vice President, Investor Relations
Thank you all. I 'll wait for people to join up. I do you have a question that has come in online.
Greg, you mentioned consolidation of ground around Greenstone and in the Greenstone district. What is the potential there and what are the plans for exploration?
Gregory Smith - President, Chief Executive Officer
I'll get Scott covered to answer to that one.
Scott Heffernan - Executive Vice President - Exploration
The short answer is that the exploration potential is excellent. And that we're now busy designing exploration strategies and plans. The belt, as Greg mentioned, is over 100 kilometers long host to a number of defined resources, including the roughly 700,000 ounce Brook Bank deposit, as well as a number of past producers such as Sand, River and leach, the old sand, river and leach mines.
These are mainly active in the 1940s and 50s. So, the immediate focus will be on the existing resources to determine the potential to expand them and to, of course, determine if they can be built on the Greenstone or whether they represent standalone targets.
Additionally, there's the greenfield potential. The belt is seen little to no modern exploration in the last 70 years and the potential discover the next Greenstone is real. So, the immediate work will largely be desktop in nature, compilation and target generation and this will progress into more field-based activities in due course.
Rhylin Bailey - Vice President, Investor Relations
Perfect, thank you. Operator. We'll now take some questions from the phone, please.
Operator
Anita Soni, CIBC World Markets.
Anita Soni - Analyst
Doug. So, my first question is with regards to the guidance. I see in the presentation you indicated the pro forma guidance would be in the range of $730,000 to $830,000.
Does that, so when is that just pending the close of the transaction, that would be the guidance and we can just adjust for when the transaction closes? Or is that subject to change as well?
Doug Reddy - Chief Operating Officer
It's pro forma right now, Anita. Based on just adjusting the Greenstone piece 400%. And until we close the transaction or main pro forma and then once we close, we'll update it formally.
Anita Soni - Analyst
And other parts to that moving parts, obviously, I mean, you've Los Filos, you indicated that was the closure or the crusher being offline for 70% of the quarter was on plan, but it does require a pretty steep ramp up. And for all the last three quarters, would you expect to be hitting your guidance at Los Filos this quarter for this year?
Gregory Smith - President, Chief Executive Officer
Yes, that the production at Los Filos in Q1 was actually better than plan. And Los Filos is absolutely on track for their guidance for the year.
Anita Soni - Analyst
Okay, it's similar question with Aurizona. Would you, I mean, would we should be adjust for the four to six weeks downtime that you have?
Gregory Smith - President, Chief Executive Officer
Yes, I think that Aurizona is a little more complicated because, at this stage, we don't know exactly what the rest of the year will look like. We did continue processing through April, and we are now into Tatajuba and started mining and we'll have or back online in June. The main flex there, Anita, is how soon we get back into the Piaba pit because, grade in Piaba is higher and that would increase production depending on when we can get back in there.
So, we don't know yet. It's still raining in Brazil and as the dry season comes, we'll advance remediation and then we'll we'll have an update on that. But based that's why I say on the call, we're not changing our consolidated guidance. I think there's enough room within our guidance to accommodate any changes at Aurizona at this stage, but we'll have a more formal update on Aurizona over the next couple of months as we get into the dry season.
Anita Soni - Analyst
Okay. And then just a little bit more focus now on Greenstone. So, I think you mentioned 1 million, 1.5 million tonnes of ore. And as you know, I'm always interested in the grade. Could you, Doug, can you give us what the grade of that is, including the average and some highs and lows on that?
Doug Reddy - Chief Operating Officer
Yes, the stockpile at the start-up was 1.5 million tonnes, but we also have broken ore in the pit. So, in total, it's about 1.9 million tonnes. Feed during the start-up, we chose to start within three materials. So, it's about 0.4 grams per tonne. And as we move through commissioning will be feeding into been one material into the plant, which gets up to around two grams per tonne.
Overall, I think you're asking how our reconciliation is. It's bang on for where we expected with the exception that we're getting additional tonnes from outside of our ore blocks, so lower grade material, it's in addition. So, we add more to bin three, that's beyond what we have what we had planned.
Anita Soni - Analyst
Yes, actually, I was just just trying to get a handle on what you're working with in the first sort of six to nine months in terms of feeding the mill. So, I think you have about 61.5 would be about 60 days of full throughput stockpile. And I'm just trying to get a gauge of how much that mining fleet has to ramp up to match the mill once it gets going -- the average grades of the bean to inventory.
Doug Reddy - Chief Operating Officer
So, you're asking what's coming direct feed from the pit?
Anita Soni - Analyst
Yeah.
Doug Reddy - Chief Operating Officer
Currently, we are broken ore from the pits around two grams. So, when we're feeding that into going in at two grams. Our operating rates 70, 80,000 tons a day. We have additional capacity to be able to ramp that up, but it's just being time to be able to feed into the mill and will gradually be ramping up through the year as we bring in additional equipment.
Anita Soni - Analyst
Okay. And then what's your current strip ratio?
Doug Reddy - Chief Operating Officer
Current, I would have to get back to you because, of course, a lot of that is, I won't say it's pioneering, but it's early stages of the pit. So, it's dealing with things such as, we've been dealing with the Glory Hole that was there was filling that low-grade material mining around that. So, it's not a straightforward question, but I'll look into what it currently is and get back to you.
Anita Soni - Analyst
Okay, that's it for my questions. I 'll get back in the queue. Thanks.
Operator
Mike Parkin, National Bank.
Mike Parkin - Analyst
Hi, guys. Juts couple of questions. When, like, what are you kind of thinking in terms of potential timing in news flow on the Aurizona underground? I know, I believe there was a study you guys were working on. When could we expect that? And if that is something that you move ahead with? When could you see potentially capital being committed for that project?
Gregory Smith - President, Chief Executive Officer
Q4. So, we're going to get into the dry season here, Mike, and then we'll start that initial development of the portal area. And then that we'll update the market sometime in the fourth quarter. I think this year in our budget, we had about $10 million allocated to the commencement of that development. So, it's not a particularly huge project in 2024.
But later this year, as when we intend on getting in there. At the moment, we're in the process of finalizing contractors and mobilizing the time line for mobilization of the people that are going to be working on it. So, it's advancing, but there's not a whole lot to say yet, and that will come later this year.
Mike Parkin - Analyst
Okay. And then switching over the Greenstone. Just in terms of labor hiring, where are you on that? Or that continuing to track fairly well?
Doug Reddy - Chief Operating Officer
We're fully, our upside is fully staffed up and we have a few people who are from the project side are just helping address any potential issues that come up during commissioning. But we're good.
Mike Parkin - Analyst
Great. And then just a random thought for you. With gold prices being so high. Is there any potential recoverable ounces in any of your historic keeps that if you did like a shock to them where historically a lower gold price wouldn't have justified the cost, but at these gold prices, you could shock some of the older pads to extract gold that might not have recovered at normal cyanide concentration?
Doug Reddy - Chief Operating Officer
That is something that we have been doing over the last few years at Los Filos. When we have an opportunity, we take some of the older material, especially if it's higher grade material that's been crushed and fully leached. We do look at turning it, but when we turn that we add line to it and then it gives us another good pulse of gold out of it.
A little bit more difficult to do at Mesquite because, there's one big large pad and it is something we always talk about is how to deal with that and given the sheer height of that path, which does cause us to have a longer start the leach cycle of solution going through that pad.
And Castle Mountain is a much smaller pad. We would consider anything that works on other pads. We would consider that for Castle Mountain as well. Filos is the one where we already are doing that.
Mike Parkin - Analyst
Okay, that's it from me guys. All the best for ramp up (inaudible)
Doug Reddy - Chief Operating Officer
Thank you.
Rhylin Bailey - Vice President, Investor Relations
I'll take a quick question from one of our analysts online. Just wondering if that Orion is responsible for the continuation of their CapEx spend until the transaction closes?
Gregory Smith - President, Chief Executive Officer
No, the economic cutoff was April 30th.
Rhylin Bailey - Vice President, Investor Relations
Operator, can we take the questions from the phone?
Operator
Kerry Smith, Haywood Securities.
Kerry Smith - Analyst
Thanks, operator. A couple of questions. Firstly for Peter, you say you spent the $1.3 billion on 100% basis on the project as of March 31st. How much more would there be to spend or I guess another way to say it is what will the final CapEx number be or is that the final number?
Peter Hardie - Chief Financial Officer
It's close to the final number, Kerry. Right now, the spend is really more on working capital. We're imminently pouring gold. We I think we've said in the past, we expect the operation to achieve cash flow neutrality fairly quickly after it starts pouring gold. So, we're seeing and the construction has been principally complete since late last year. So, we think we're right near the end here.
Kerry Smith - Analyst
Okay, great. And maybe for Doug. On Tatajuba, you're going to have this gap where you won't have any tonnes coming, any ore tonnes coming out of the main Piaba pit and you're going to be accessing ore in Tatajuba.
What is the grade or like can you deliver a similar amount of ounces per month from Tatajuba or will there be a production decline on a monthly basis because, the plant's maxed out and the grade from Tatajuba is 20% less to whatever the number is?
Doug Reddy - Chief Operating Officer
Tonnes wise, we've done the plan so that we can take up the feed to the plant, that's not an issue. I mean, Scott, far more cognizant of the work we've been doing at Tatajuba overall on the reserves and resource reserve side. So, I'll let him speak to that.
Scott Heffernan - Executive Vice President - Exploration
Sure. So, you're right, Kerry. The grade is lower on average Tatajuba than in Piaba proper. But the ore zone does daylight and right now the equipment's in that upper laterite and saprolite to zone, where you have some collapse and distribution of grade over a much broader area. So, not much, I mean, we're right into ore. Tatajuba is exposed now with the vegetation having been cleared and mining is underway.
Kerry Smith - Analyst
So, Doug, you're kind of expecting you can push the plant a little bit and kind of keeping up the monthly production and ounces kind of similar from either ore body?
Doug Reddy - Chief Operating Officer
That's what we're looking at. I mean, we did put in the Piaba crusher, which has been fully commissioned, but that for Tatajuba that has no bearing interest gives us the opportunity when we start to get back into fresh material, whether it be Piaba or underground. So, in the meantime, Tatajuba, it's waste, it's so much softer and allows us to be able to operate at higher throughput.
Kerry Smith - Analyst
Okay, great. And you talked about this internal evaluation at Castle Mountain Phase 1. When would that be finished?
Doug Reddy - Chief Operating Officer
We've been working it through with different scenarios during the first part of this quarter. But I think we'll continue to be working that through the rest of Q2 probably have some conclusions in Q3, and that's kind of our normal business planning cycle overall for leading into our mine plans that go into the budget cycle. So, it's a natural cadence for us.
Kerry Smith - Analyst
Okay. And then on the discussions with the three communities at Los Filos. As long as you're making, would it be fair to say that as long as you're making progress in those discussions that you don't have a definitive end date where you say, if we don't have an agreement by the end of the year where we're done and we're going to shut down or would you continue to just keep going as long as you're making progress?
Doug Reddy - Chief Operating Officer
We continue to have the dialogue. With all three communities and the dialogue is going very well. Obviously, we have overall timing when it comes to operating the mine, as we've said efficiently, given that heap leach is not the way to go, we want to transition over to CIL. and, but in regards to the specifics of timing and everything, I think that's something that I can't really get into because, that's part of the dialogue. It is a conversation. It's not, it's driven both by working together jointly on this.
Kerry Smith - Analyst
Okay. So, would it be fair to assume that you'll continue the dialogue at least for the rest of 2024 then. And there's no risk that you would move to shutter down this year or over (inaudible)?
Doug Reddy - Chief Operating Officer
We have a mine plan through 2024.
Kerry Smith - Analyst
Okay. And on the hedging that you have to put on for the new $500 million loan. You said that would be over the next 36 months to mid 2026. Will that be equal by quarter, Peter, or how might that hedge be added?
Peter Hardie - Chief Financial Officer
Yes, thanks, Kerry. We're reviewing that strategy and haven't decided on yet. There's different options, including the one you're referring to of doing a straight line hedge. We may move some more of that hedge upfront, but we have decided that fully. Once we have decided it, we'll let everybody know what we did.
Kerry Smith - Analyst
Okay, great. And then last question, I had, Doug was just on Santa Luz received a new train in the declining release. These projects, I guess probably should have been done a year and a half ago. I'm just wondering why it took so long to decide to push ahead of them was addition needing to do the engineering or you weren't quite sure what the ultimate strategy might be?
Doug Reddy - Chief Operating Officer
No, it's methodical working through test work to make sure that when we went to from pilot plant to industrial scale, we were going to disrupt anything, and then doing the engineering work and doing the ordering and delivery of the equipment and scheduling it, so that we can get other changes completed before we start to do this.
If you change everything at once, you don't really know what's working. So, that's why it's a stepwise fashion of working through all the changes in Q1. So, we are ready for the Q2, Q3 implementation of these two, and then we'll see the results in Q3.
Kerry Smith - Analyst
Okay, thanks very much. Appreciate guys.
Gregory Smith - President, Chief Executive Officer
Thanks.
Rhylin Bailey - Vice President, Investor Relations
We do have a few questions online. I'll get back to you by e-mail about those. And I think we're done for now. Greg, do you have any closing remarks?
Gregory Smith - President, Chief Executive Officer
No, none for me, Rhylin, other than just thanks again, everyone for joining the call. Thanks for the continued support, and we'll talk to you next quarter.
Rhylin Bailey - Vice President, Investor Relations
Perfect. Thank you, operator, you can now conclude the call.
Operator
This concludes today's conference call. You may disconnect your lines. Thank you for participating, and have a pleasant day.