Good afternoon, everyone. To those joining us from North America, good morning again today, and welcome to our Capital Markets Day presentation. Before we start, as always, please let me call your attention to the fact that we'll be making forward-looking statements during the course of these remarks. Slide two is our safe harbor statement.
You'll see on slide three our competent person statement, which is related to our ore reserve and mineral resource declaration. They're both important documents, and I please ask you to read them. We've got a full agenda today. We've designed the session, which is roughly two hours in all, to provide a useful lens through which to view AngloGold, both its strategic outlook and also our future prospects and our approach to capital allocation. As I say, a full agenda.
In the first session, we'll start with an exposition of our strategy from Christine, through to a useful discussion, or one at least that we hope will be useful, financial discussion to assist in modeling, through to an overview of our ESG and exploration programs. After that, we'll take questions for 10-15 minutes, and a break.
During the break, we'll be showing a video which has a look at our Quebradona project, which I think will be informative and useful, too. In the second session, Vaughan Chamberlain is going to start off with a look at our mineral resource management program, and each of the operators will talk through our operations and the very exciting slate of projects we've got in front of us. Christine will wrap at the end, and we'll take another set of questions. Christine, without further ado, I'll hand over to you.
Thanks, Stewart. Good morning or good afternoon for those joining us from South Africa. Thank you for joining us today as we take you through the basis of the strong performance that we announced yesterday. As we look to the future, AGA is at an exciting inflection point in its growth path. The global team has worked steady over a long period of time to optimize our portfolio. Today, we're well positioned to capitalize on that hard work. The entire leadership of this company and the Board are aligned behind our strategy, and we continue to work together to deliver on it.
As the world's third largest producer of gold, we've built the strategy around our greatest strengths, a diverse portfolio full of optionality and an exceptional team. We have in place a detailed mine-by-mine growth plan backed by a disciplined capital allocation strategy, which are designed to unlock the full underlying value of our portfolio. What do we expect to achieve over the next five years? We'll grow production by up to 20%, mainly through brownfields options, plus two excellent greenfield projects that will come to the board for approval this year.
We'll see steadily declining costs over the period as our investments bear fruit. We'll stay laser-focused on converting more of our vast mineral resource endowment into ore reserves. AGA has the foundation to deliver on this. We are approaching our strategic plans from a position of financial strength. Our balance sheet and free cash flow profile are the strongest they've been in a decade. We have a well-defined capital allocation framework focused on making careful investments that provide returns above our cost of capital. Ian will talk to this just now.
Our brownfield and greenfield project pipeline, which is fully self-generated and self-funded, can support our production plans for the long term. Our strong ESG track record gives us the social license to operate in the communities we share around the world. We're also building on a strong climate track record and are committed to charting a pathway to net zero. 2020 was a solid year for the company, despite the restrictions imposed by COVID-19. Our resilience owed largely to the diversity of our portfolio, which helped offset declines from sites impacted by the pandemic.
During this period, we focused our efforts on business continuity and meeting our strategic objectives while prioritizing the safety of our employees and communities. You can see here the fruits of our efforts. Thanks to our strategy of streamlining our portfolio to focus on higher return opportunities, of course, due to the higher gold price, we more than doubled free cash flow before gross capital to $1 billion. This, coupled with a more generous dividend policy, ensured a five-fold increase in dividends declared.
We've used the opportunity to further fortify our balance sheet, which now has $2.8 billion in liquidity, manageable near-term maturities, and our leverage ratio is about 80% below our one-time target. Our very deliberate ore reserve reinvestment strategy has performed exceptionally well. You've seen the reserve life of our portfolio rise to around 11 years, adding 6.1 million ounces of gross ore reserve. This reflected a net increase of 2.7 million ounces from 2019. That's after only one year of focused effort. ESG is a central plank of our strategy and a condition without which we simply can't create long-term value.
As you'll hear from Stewart a little later, sustainability is embedded in each of our corporate objectives. It's also at the heart of other key areas like our compensation metrics, our key performance indicators, and in our annual mine and development plans. This focus on ESG creates a virtuous circle, strengthening the business and creating value for a wide range of stakeholders. A key aspect is ensuring the health and wellbeing of our people and the communities in our zone of influence. This extends to partnership with our hosts and the support and development opportunities we're able to provide as a result.
It comes in the form of local jobs and skills development. It includes running a healthy, profitable business that pays taxes and royalties and grows and supports local business with procurement. This is what forms the basis of durable, trusting partnerships and what, in the long term, will create more efficient operations with lower risk profiles and more opportunities for growth. As you can see from our key metrics, sustainability is at the heart of all aspects of our business and value chain. I'm encouraged by our performance on critical metrics, but realize that we still have much work to do.
We'll provide more detail around our performance in the ESG section of this presentation. Our confidence in executing our strategy is underpinned by a strong track record of delivering on our commitments. This business is led by a transparent, decisive management team focused on minimizing risk and improving shareholder returns. The data speaks for itself. We've met our cost and production guidance for eight consecutive years, and in the past five years, we've shored up the balance sheet, reducing net debt by more than 80% since peaking in 2013.
This leaves us with leverage of 0.24x , well below our target level. We've improved shareholder returns. Dividend payments resumed in 2016. We doubled the payout ratio last year to a competitive 20% of free cash flow before growth capital, and we've increased our portfolio's reserve life to almost 11 years and streamlined our portfolio to focus on higher return options. Obuasi is making steady progress. From a big picture standpoint, we've made tremendous progress on several fronts in a challenging operating landscape.
Let's take a step back to focus on AGA from a high level. Our greatest strength is our world-class portfolio of assets run by a truly excellent team. We've made steady progress to make that portfolio even stronger and more sustainable. As we focus on higher quality, lower cost mines, we've taken decisive and sometimes difficult steps to optimize the portfolio. As I look across our global footprint, there's exciting progress. We're extending mine lives and upgrading assets by bringing in lower cost ounces.
At Obuasi, where our redevelopment efforts are creating a world-class, high margin asset for the long term. In a visit late last year, the enthusiasm and pride of the team on the ground was very hard to miss. This team has come together in an incredibly challenging environment to complete phase I and get to the final steps of phase II. It remains on budget and on track to a very tight schedule, which Graham will elaborate on in a while. Ore reserves are being added across the portfolio, notably at Geita, a truly world-class asset, and at Siguiri, Obuasi, at AGA Mineração, and Sunrise Dam.
There's also the collective experience and commitment from across the business, which has come together to provide a robust evaluation of our greenfield projects in Colombia. The future has never been brighter. We're certainly committed to maximizing long-term shareholder value and returns, and we want to be transparent about how we do it. Our capital allocation framework is balanced and clear and has proven itself over more difficult market conditions than the current one to be robust. Like everything we do, it starts with prioritizing investment in our asset base to support the health and sustainability of the business.
From sustaining free cash flow that comes as a result, we have three main priorities: to self-fund growth capital with an absolute disciplined focus on risk-adjusted returns, to maintain a solid balance sheet giving us strategic flexibility through the cycle, and to return cash to shareholders through our increased dividend payout ratio. At every point of capital allocation decisions, we are mindful to be careful stewards of capital. Increasing ore reserves is a clear priority. Just in the last year, we managed to increase the reserve life of our portfolio to 11 years. We saw additions at Obuasi, Geita, and Kibali.
This strategy will continue across the portfolio to achieve further reserve growth. We see a clear connection between unblocking latent value in our portfolio and our ability to successfully grow reserves from the drill bit. Importantly, our aim to continue growing those reserves on a per share basis truly sets us apart. Equally important, between 2016 and 2019, we posted steady year-on-year increases in the group reserve grade, achieving a 17% increase in the proved category. In 2020, on the back of our aggressive exploration program and the divestment of assets in Mali and South Africa, we recorded a 45% increase in the average grade of our proved and probable resources.
Where does this place us over the longer term? On a five-year outlook, we're expecting an average 5% compound annual growth in our gold production. The primary driver of production growth over the next two years is related to Obuasi operating at steady state, Tropicana reverting to normalized production levels following the current reinvestment in its life extension, and then planned production gains from AGA Mineração, Siguiri, and Sunrise Dam. In fact, most of the growth over the period is driven by improvements in our current suite of operating assets, supplemented in the outer years by Quebradona and Gramalote projects.
Sustaining capital expenditure for each of 2021 and 2022 is expected to range between $720 million-$820 million, which equates to $260-$290 an ounce. This includes investment of $330 million and $380 million in ore reserve development and exploration, and Brazil tailings compliance capital this year of $70 million-$80 million. On a per ounce basis, however, sustaining capital will decline next year as production notches higher. The Colombia investments mean total capital expenditure is expected to increase in 2022- 2024 before falling off.
Following the completion of these projects, as well as the expected return of sustaining capital to normalized levels at around $160-$200 an ounce, when the current intensive brownfields investment campaign comes to an end, all-in sustaining costs are expected to decline to between $900-$1,150 an ounce in 2025. Ian will unpack some of the details shortly, and that's in nominal terms. The Colombian projects have a material impact on the production and cost trajectory of the business over the long term. These are long life, low cost projects, and at steady state, are expected to reduce our long-term all-in sustaining costs by about 10%.
We are absolutely focused on unlocking shareholder value. We've shown year in and year out that we deliver on our commitments at every stage of the cycle. This, combined with our long history of new ounce conversion, project execution, and capital discipline, puts us in prime position to deliver. Our capability and potential is, of course, directed toward a focus on sustainable, high margin ounces that benefit our shareholders and communities.
We will build on the positive momentum in converting resource to reserves, and these investments are expected to position us to replace ore reserves over time and restock the pipeline with new mineral resource. It's an exciting time for us, and that is supplemented by several catalysts. We have Obuasi to complete and new world-class projects in Colombia to take to an investment decision. Cash lockups in Tanzania and the D.R.C. are being worked on and will provide a clear uplift once resolved. In the meantime, we're laser focused on realizing our catalysts and delivering on our strategic objectives.
Having seen what we've talked through today, I'm sure you're excited as I am about the future of AngloGold Ashanti. Our business is primed to release significant value, firmly grounded in our values, with ESG as a motivating component of all our business decisions. As I think about AngloGold Ashanti's next chapter, I'm confident that our rigorous capital allocation framework, which you heard about in depth today, will guide us as we execute on our strategy.
We've optimized our world-class portfolio, and now we are harnessing the collective knowledge of our team to unlock the tremendous value it holds. This starts with exploration and mineral resource management. It extends to all our operations and ultimately to the successful extraction of ore in a safe, low-cost, and high-value manner. With that, I'll hand over to Ian, who will provide the detail on our capital allocation framework.
Thank you, Christine. Good day everybody. We have been transparent with regards to the capital allocation discipline that we applied in order to maximize long-term shareholder value and returns. This discipline has been consistently applied and stood us in good stead over a number of years, when low gold price levels put significant pressure on our margins achieved. With the current increased gold price levels, this capital discipline does not change and continues to be relevant.
The immediate focus is on reinvesting continuously in our asset base to support the long-term sustainability of our business. I will elaborate on this later. Our focus of maintaining a strong balance sheet and decreasing debt levels remains, more so in the current operating environment, where the COVID-19 pandemic has created a significant layer of additional complexity and risk to the mining industry in general.
We are confident that we have proven our commitment to return cash to our shareholders. Our increased dividend payout percentage, as well as the increased frequency of payout to biannual from 2021, is testimony thereof. Yesterday's dividend declaration results in a five-fold increase in cash returns to shareholders compared to the previous year. Our growth projects in Colombia, which when approved by our board and once in full production, will result in a step change in our portfolio in terms of the cost profile, margins achieved, and free cash flow generated.
In combination with Obuasi, it provides us with a layer of new long-term, lower-cost operations. Any remaining cash will continue to be applied to additional opportunities, which may include any combination of enhanced dividend payouts and other organic growth opportunities. Under the right circumstances, inorganic growth opportunities will also be considered. We have a strong track record of operating and developing major projects. From a sustaining capital perspective, our intention is to increase our capital intensity with regards to our reinvestment strategy in exploration or reserve development and deferred stripping initiatives across our portfolio.
We have commenced this process in 2020 and based on the outcomes last year, increasing our efforts on this front will create opportunities to further enhance mining flexibility. Overlaying the additional reinvestment, which is anticipated to be continued for another two years, is the increased regulatory requirements of tailing storage facilities or TSF compliance in Brazil, and further spend required for TSF infrastructure at other operations, including Iduapriem, Tropicana, and Cerro Vanguardia. Furthermore, with Obuasi continuing its phase II construction and ramp-up efforts in 2021, there's a shift from growth capital to sustaining capital and ore reserve development at that operation.
Directionally, the expectation is for sustaining capital to increase to levels between $260-$290 per ounce in both 2021 and 2022. Whereafter the expectation is that the level of spend normalize at around $160-$200 per ounce from 2023 onwards. The key areas of estimated additional spend in the next two years includes approximately $50 per ounce for the continued targeted reinvestment efforts, approximately $35 per ounce for efforts on tailings compliance and other infrastructure expenses, and approximately $30 per ounce for additional Obuasi ore reserve development and sustaining capital expenditure.
Turning the focus to growth CapEx, the outflows is mainly related to the Gramalote and Quebradona projects in Colombia. The Obuasi redevelopment growth capital spend is anticipated to be completed in 2022, while significant growth capital outflows are estimated from 2022 and reaching a high in 2023, before starting to decrease as Gramalote starts to enter its production phase. At steady state, Gramalote will add attributable ounces of between 125,000 ounces- 150,000 ounces to the portfolio at a nominal all-in sustaining cost of between $600 per ounce to $700 per ounce.
Quebradona allows the group to diversify into copper production at an attractive estimated copper all-in sustaining cost margin of between 60%-70%. Our capital allocation discipline focus on appropriately balancing capital returns to shareholders on the short and long term. Our efforts in this regard ensure that we do not return capital to shareholders in the short term to the detriment of long-term development and sustainability of the business.
Our dividend policy remains focused on providing leverage to the gold price, since the dividend payout is determined based on a free cash flow metric. This will result in variability in payouts as the gold price fluctuates. Our ability to generate free cash flow significantly increases as the gold price level increases. Our portfolio is geared to generate free cash flow levels comparable to our current market capitalization at the $1,900 per ounce gold price. Cumulative dividend payout levels are reflected on the table in this slide, indicating that even at gold price levels as low as $1,300 per ounce, dividend payouts over the five-year period will occur.
Our focus to maintain a strong balance sheet remains even after our net debt level has reached its lowest level in a decade, decreasing to below $600 million. We currently have strong liquidity, with cash balances exceeding $1.3 billion, which excludes the cash lockup in the D.R.C of $424 million. Our multicurrency $1.4 billion RCF is currently undrawn. Our new $700 million 10-year bond was issued at a coupon of 3.75%, the lowest in the history of the company. This position allows us to consider optionality with regards to liquidity management efforts focused on the 2022 $750 million bonds.
It further provides optionality with regards to the funding of the Colombia operations, allowing us to consider whether we self-fund, which is our preference, or enter into green or other funding opportunities. Although we have canceled the $1 billion standby facility we entered into when the COVID-19 pandemic first emerged, our current liquidity levels provide us with sufficient comfort that we can manage any unfavorable and unforeseen impacts of this pandemic in the foreseeable future.
Our leverage target remains to be less than one times through the cycle. All of this can be achieved while we continue to pay sizable dividends. On our debt maturity profile, the most significant near-term item is the upcoming redemption of the $750 million bonds in 2022. As mentioned, we currently have optionality in evaluating our next steps. It is clear that the current combination of cash, funding options, and undrawn facilities available allow us to withstand market volatility to a large degree. At our current cash flow levels, we are in a position to evaluate further optionality.
From a growth perspective, we will continue to target value-accretive organic opportunities, as well as inorganic opportunities under the right circumstances. From a balance sheet perspective, we will continue to maintain our balance sheet strength and consider what our optimal capital structure should be. We will continue to monitor the appropriateness of our dividend payout rate and potentially consider other capital return options.
Finally, our financial reporting is very complex and requires careful consideration of how production costs and free cash flow results are presented from subsidiaries, joint operations, and joint ventures, let alone pre-production stage operations and discontinued operations. The purpose of today is not to focus on these complexities. However, we remain open and willing to engage with anybody requiring a more in-depth discussion and explanation with regards to our accounting complexities. Thank you. I will hand over to Stewart.
Thanks, Ian. One thing that sets us apart from many of our peers is a clear set of sustainability-driven values. We're very proud of the fact that our core business values, set well over a decade ago, so closely align with an increasingly sophisticated ESG landscape and also with many of the UN Sustainable Development Goals. These ensure that our business decisions are always made through an ESG lens. Our ESG efforts are at all times guided by a comprehensive materiality assessment, which determines our key priorities.
I'll cover the five issues listed here in more detail today. We arrive at each of these issues after a comprehensive mapping exercise, during which we consult with a range of internal and external stakeholders. In turn, we structure our sustainability interventions to respond proactively to our material issues. These priorities are underpinned by strong governance systems and a culture of transparency in how we operate and how we interact with others.
These priorities are embedded in the fabric of our company, not only through our values, but also through our organizational objectives and, importantly, in how our senior leaders are compensated. We believe this creates the condition that enables the company to effectively create both social and financial value over the long term. In ESG, the G, for governance, is clearly foundational. It's what helps us sleep at night. We have a culture of transparent reporting, internally and externally, to provide confidence that things are working as they should, right all the way down to the site level.
When they're not, we can move quickly to address them. I've highlighted four of the most critical governance systems in AngloGold, starting with the very active oversight and engagement from our board. It's difficult to overstate how much importance our Board places on ESG in ensuring the protection of our communities and the environments we work in and ensuring we safeguard our reputation as we meet our business objectives.
Second, we have a stable of world-class policies and standards which form the backbone of our management systems. These are fully aligned to industry best practice. Third is the active engagement and oversight of our executive management team. This ensures that risk, impacts, and opportunities are flagged and managed, which ultimately prevents problems from turning into crises. Last year's management of the COVID-19 pandemic is a case in point.
We were able to respond quickly to not only ensure business continuity and delivery on our strategic objectives, but to ensure that our people and our communities were strongly supported throughout. Last is our rigorous approach to assurance, again, both internal and external. This brings an additional level of scrutiny and oversight and an extra layer of confidence for our stakeholders. We prioritize health and safety in everything we do. Our performance over time, including in South Africa, highlights progress that can be made in relatively complex conditions.
The reduction in injury rates and in occupational disease rates has been a result of steady, deliberate work and interventions over 10 years. It's an area where we are never satisfied and one in which we know we're only ever as good as today's performance. We are working continuously to strengthen our systems and to reinforce our very strong culture around health and safety. We're also constantly looking at the deployment of technology, whether in ground control monitoring systems or proximity detection systems, to further reduce the risk of injury.
We're also working to continually review and improve our COVID-19 response, to do everything we can to ensure our employees are safe. We are reinforcing and refining those protocols that have helped keep us safe over the past year, and we're also engaging with stakeholders to explore ways to support community-based vaccination campaigns as COVID-19 vaccines become more widely available. We are no strangers to creating public health partnerships.
We have a long track record in South Africa with respect to HIV and TB, and in West Africa with the last Ebola outbreak, and also in fighting malaria, which is endemic to much of the region. In 2005, we started an ambitious plan to eliminate malaria in Obuasi. It started with a detailed census of the local community and mapping hundreds of thousands of structures in the community. That informed an indoor spraying campaign and the mass rollout of bed nets to all homes. We did that alongside a comprehensive education and awareness campaign.
Obviously, this requires close cooperation with communities, which has continued throughout the program's 15-year lifespan. Fast-forward to today, malaria rates in the region are down 90%. Work and school absenteeism, an epidemic itself when we started, are down a similar amount. The program is recognized widely as one of the best of its kind in the world, and we're working closely with The Global Fund in extending it to 16 districts in Ghana, and it now covers almost 1 million people. We have similar programs in place at our other sites.
It's a true model for community partnerships and shows how mining companies can be leaders in delivering social benefit. Climate change is another of our priorities, both at the Board and management level. We set our first targets back in 2008, well before it became commonplace to do so. We aim to cut emissions intensity of our portfolio by 30% over 15 years. That seemed hopelessly optimistic at the time. Since then, carbon intensity is down 43%, meeting our goal with some years to spare.
In fact, the overall emissions of our portfolio have almost halved over that time. This was not only achieved by selling off high GHG-emitting assets. We did it by strategically relocating and switching off large compressors in underground shafts in South Africa. We reused waste heat from compressors to heat water in underground shafts. We developed three pipe chamber systems to recover electric energy from ice and water sent from surface to underground to assist with pumping water back to surface.
We also made smaller changes that, with scale, had big impacts, like replacing incandescent and cap lamp bulbs with LEDs, and installing heat pumps and solar systems in our accommodation units. In Australia, we switched Sunrise Dam's generators from diesel to LNG, and after commissioning Tropicana, we switched both to piped natural gas. In addition, new projects in Colombia will be hydropower, adding to our other hydropower sites in Brazil and the D.R.C.
We're taking lessons from our past experience and consulting new science and climate models as we look to set new targets later this year. We'll follow that by charting a pathway to net zero, something we're firmly committed to. All of this is backed by bottom-up work currently being done at each site. It includes detailed climate risk assessments, considering an aggressive set of future climate scenarios. This, in turn, will help us publish our inaugural TCFD report this year, bringing our disclosure in line with good practice.
We have a strong track record in managing an international portfolio of different types of TSFs. We're also committed to implementing the global industry standard on tailings management. Our tailings governance system is robust and has four distinct levels of assurance with a comprehensive system of checks and balances. This includes specialist inspections and detailed assurance. There are clear mechanisms for reporting risk and tracking mitigation measures, and also clear channels for escalating issues at any site.
It's important to note, in line with the overall governance framework I spoke to earlier, that EXCOM and the board are kept abreast of TSF status on a regular basis. Our aim is to build communities that are free of poverty and inequality. AngloGold Ashanti was one of the first signatories to the United Nations Women's Empowerment Principles. This raises the bar for our performance with respect to gender and inclusivity. Gender diversity is also a KPI for senior management. We established a specific gender diversity policy in 2015, which continues to guide our efforts to enhance gender inclusivity across the organization.
We have also completed diversity and inclusion assessments across every one of our sites to identify roadblocks to inclusion in the workplace. Our responsiveness on these issues, in addition to our policy frameworks and initiatives, are part of the reason we are one of only four gold companies included in the Bloomberg Gender-Equality Index. We continually seek ways to improve our human rights performance and are mindful that we cannot allow complacency to creep into our business. Last year, we trained over 11,000 people human rights awareness, including almost every one of our security personnel.
The integration of human rights standards throughout our supply chain is also an area of focus, and we've implemented a responsible sourcing program across our Africa region, which helps us identify and handle possible risks posed by any supplier. We're also very cognizant of human rights associated with indigenous peoples, which are distinct societies defined clearly by the UN. We operate in only one country, Australia, where indigenous communities, as defined, live nearby. Our relationships with these communities and the areas they live in are governed by a specific set of policies and standards.
I'm pleased to say that in Australia we have, over almost 30 years, developed a strong level of trust and cooperation with the traditional owners of the land on which we operate. There is a clear way to obtain and improve the social license to operate. It's about responsibly mitigating impacts from mining, constructively and transparently engaging with communities impacted by our operations, and ensuring that the benefits of mining are shared fairly. These benefits can often represent a significant injection of wealth and development to areas with otherwise limited alternatives.
Consider more than $1 billion paid to governments last year in royalties and taxes from our business. Think about how important these funds are in the recovery from the COVID pandemic, where entire economic sectors have been decimated. More than $2 billion paid to employees and local businesses, which in turn help fuel an engine of economic prosperity around our mines and beyond. Promoting local hiring and procurement is a strategic priority for us, and we have the data to back that up. 85% of our procurement budget is spent locally, representing a further injection of capital into these areas.
We support that aim with significant education and training programs and skills development interventions for our employees and broader communities. Our strong local partnerships mean we can better leverage our resources to magnify our overall development impact. We're working to better hear our stakeholders and to more clearly understand their priorities and aspirations to eliminate white elephant CSI projects and embark on those that will leave a lasting benefit. At every one of our mine sites, we have a community development plan built with our government and community partners with the priorities of local people in mind.
This slide shows some examples of how we're working hand in glove with our hosts to support development and upliftment and to meet a number of the UN Sustainable Development Goals in the process. In fact, if you step back, you'll see that few other industries are as well-placed to have this impact in many of the areas we operate, that is something the gold sector should be proud of.
We live in the age of transparency, a range of unrelated external service providers have analyzed and ranked our disclosure and performance independently. We do not shy away from this kind of external review. It provides an invaluable opportunity to benchmark ourselves against our peers. Of course, we're proud of areas where we compare well, but we're more interested in finding areas of improvement. Christine said it well, good ESG equals good performance.
Without continuous improvement in this area, we simply cannot create long-term value. We must continue to ensure the highest standards of governance and transparency in everything we do. We've done good work on reducing emissions and reducing water use, where almost 3/4 of our total requirements are recycled, but we're pushing hard to do better. It's difficult not to see ESG as a simple, virtuous cycle.
Get it right, and it's mutually reinforcing, creating value for all stakeholders and cementing our license to operate. That license to operate ensures the ability to generate wealth and benefit, which in turn is shared among a wide range of stakeholders. It manifests in support for countries and communities through local procurement, training, and taxes, and in the development and transfer of the skills that are important in growing economy.
It manifests in greater access to ore bodies, which in turn are the wellspring for more value and wealth creation. While some may see ESG as a form of corporate philanthropy, they really miss the point. By protecting and enhancing the communities and the environment, and by promoting a truly diverse and inclusive business, we're promoting the long-term sustainability of our business. I'll now hand over to Tim.
Stewart. Our exploration programs work to consistent standards and processes across the portfolio and are guided by peer review. If we look at the past five years, brownfields exploration investment in the portfolio ranged between $90 million and $100 million in the prior four years, before increasing to just over $130 million in 2020. The increase was linked to our focused investment strategy in exploration drilling and ore reserve development to grow the ore reserve base and add years of reserve life in the portfolio.
In this period, ore reserves grew from 24.9 million ounces-29.7 million ounces, with the overall addition of 19.2 million ounces offsetting depletion by mining of 15.1 million ounces. The ore reserve and mineral resources additions shown here for 2020 are net after the removal linked to the sale of the Sadiola mine. 2020 capped four consecutive years of annual ore reserve additions above 4,000,000 oz in our current portfolio, well above the average annual depletion in the same period, giving us a steady year-on-year expansion of reserve life in the portfolio.
Our exploration processes focus on identifying the best group of drill targets and prioritizing those with the highest potential for success to be advanced first. This applies in both the greenfields and brownfields exploration areas. In our greenfields programs, we want to make Tier 1 discoveries in stable jurisdictions that will have the potential to improve the production and cost metrics of the portfolio. At mine site programs, our planning and prioritization processes allow us to advance the best targets first, so that we are able to replace and grow ore reserves by providing a mine site project pipeline at each site that leads us to reliable production schedules.
Our equity investments are targeted toward companies exploring within highly prospective terrains and districts that have the potential for the discovery of ore deposits that may be a fit for the company's portfolio. Our planned investment in brownfields exploration drilling ramps up again in 2021 to approximately $150 million-$160 million for ore reserve and mineral resource addition.
We expect another good year of performance across the portfolio, but we'd like to call out here the gains we expect to see from the Sunrise Dam targets drill out, Tropicana Havana expansion and underground opportunities, the new additions to the Geita portfolio, along with Obuasi, Siguiri, and Iduapriem opportunities in the Africa Group, the Brazilian mines, and Serra Grande. Meeting our ore reserve addition target would add the new ounces at or less than an all-in inclusive cost of $45 per ounce.
We have expanded our greenfields exploration budget in 2021 to allow for additional drilling in Western Australia and Nevada targets, as well as to support exploration opportunities across our portfolio. We will work on the expectation that we'll be able to conduct fieldwork in all jurisdictions within the portfolio as there is progress toward pandemic conditions reducing. We were able to take advantage of field restrictions that were in place in some areas during most of 2020 to generate a new group of terrains and districts through desktop reviews and other data reviews for field validation now in 2021.
In our equity investment portfolio, two companies saw positive advances in 2020, with Pure Gold Mining achieving first gold production at the Madsen mine redevelopment in Red Lake, Ontario, and Corvus Gold continued advanced exploration at their projects in Nevada and published updated PEA studies for the North Bullfrog and Mother Lode projects. The other companies were active last year, aligned with elevated gold prices and saw progress in their projects and portfolios.
AngloGold Ashanti actively monitors for new early-stage opportunities that have the potential to be a fit for our company portfolio if the exploration programs for those projects are ultimately successful. In this slide, we see the continuing development of our exploration project pipeline of greenfields and mine site programs in every jurisdiction where we operate. There are additional early-stage projects being established coming out of the work of our target generation teams.
The other projects advance through exploration phases and stage gate reviews, where if we have continued success, will lead to new mines for the company, such as Tropicana or the advanced projects like Gramalote and Quebradona. The organic growth pipeline supports and complements the ongoing parallel discovery and development exploration that's occurring in the mine site exploration programs, that have provided the stable growth in recent years that we have highlighted from within our portfolio. I'll now turn it back over to Stewart.
Thanks, Tim. We'll now take some questions. Irene, if we could take some questions off the line first, please.
Thank you. Our first question from the conference is from Shilan Modi of UBS.
Good afternoon, everyone. Thanks for hosting the presentation today, and thanks for all the information you're providing us. A couple of questions from me. Primarily relating to the outlook for production and CapEx. Firstly, would you consider hedging at least part of your production, and that could be in the form of zero cost collars or forward contracts or even put options, while you're going through a high capital spend phase? You're guiding to almost $1 billion per year in CapEx for the next five years. Given the volatility in the gold price, have you thought about hedging?
Second thing is the range for the all-in sustaining costs in the guidance, especially when you're looking at 2025, is quite broad. Can you just break down the gap for us, so that $900-$1,150 gap. I understand part of it is CapEx, and I understand part of it is production volumes, but maybe give us some more information on how to think about that. Thanks.
Okay, I'll handle. Thanks, Shilan, and good day to you. I'll handle the question on the gold price and hedging, what are our views on that regard, and if Ian can please deal with the question on the all-in sustaining costs. I think, it's very clear that our policy is actually not to hedge gold. I think in particular, firstly, it's a stated policy.
I think secondly, we've only hedged the gold price in very unique instances, when we, for example, have been disposing of operations, such as in South Africa in the past, and we did hedge a portion of CVSA's production last year. Those are the only unique circumstances that we have actually hedged. I think specifically as relates to the capital expenditure, we would hedge capital, like sort of long lead items, where it makes sense to do so. We do keep that quite separate from our production and gold hedging itself. Ian?
Thanks, Christine. Just on the all-in sustaining cost range out in 2025. This is our first attempt to put out guidance and indicative outlook five years into the future. I think we've been a little bit probably on the conservative side in that range. We are dealing with multiple jurisdictions with impacts of foreign currency movements in those countries and with a COVID pandemic. We think of that as a significant amount of uncertainty, and we just wanted to guide a range that we believe is achievable. I think that's what I want to say on that. Thanks.
Thank you.
Okay, thanks. I've got one follow-up question, if that's okay. Just the CapEx for the projects at Quebradona, Gramalote, and some of the other project CapEx that you have. Have you hedged any of that, or have you de-risked those projects in any way as things stand today?
Shilan, at this point in time, no. There is no hedging that's been applied to the capital. Firstly, we haven't actually made commitments for any long lead items. I think certainly when we're in a position to do so, we'll definitely consider hedging. I think right now the capital expenditure there is more related to the drilling and exploration expenditure and then, of course, we have made land acquisitions, and for Gramalote, there will be resettlements that will be done. I think that's not really the kind of expenditure that you would actually be hedging.
Certainly, going forward, when it comes to long lead items, that's something that we will consider hedging in future. Of course, when we look at other types of risk mitigation around the project, I think particularly for Quebradona, we would be looking at different types of financing risk mitigation. I think certainly what comes to mind is project financing for the project.
Although Ian stated that our preference is to self-fund it and we've got significant headroom in our balance sheet, we would consider project financing on a limited recourse basis. We'll also consider long-term offtake agreements, and other types of risk mitigation, financial risk mitigation around the project. That's all part of the feasibility study, and by the time we make an investment decision, we'll be able to give you a better line of sight from that perspective.
Just on those long-term offtake agreements, would that be for the copper?
Yes. That is what we've been looking for the copper products. Of course, these long-term offtake agreements, as much as you'd have a fixed formula, I think it would be actually linked also to market pricing in there. I think that the details of that are still being considered at this point in time. We'll give you better visibility on it once the feasibility study has been completed.
Okay. Thanks very much.
Sure.
Irene?
Thank you. Our next question is from Arnold van Graan of Nedbank.
Yes, good afternoon. I have two questions from my side. The first one relates to greenfields exploration. You're spending about $35 million this year. How does that compare to, let's say, the last three years? Then strategically, what is your view on exploration as a way of adding long-term value? What's the best approach? Do you go at it yourself, or is it better to invest in a junior company, as you've alluded to there?
That's the first one on exploration. Then secondly, just practically on dry stack tailings, a quick one. Does it have any impact on productivity, first of all? In other words, can you just keep on producing at the same rate, even if you do that? Is there any cost impact associated further down the line with tailings management, when you've got dry stacks tailings? Thank you very much.
I'd like Tim to handle the question relating to greenfields exploration and the detail, but I think just as an overall, I think we've proven, as a company, that we've been quite successful at exploration, doing it ourselves. We sort of added to resources at about $33 an ounce. We've got a very successful track record in that regard. Tim, would you like to add more to that? I think specifically flesh out the greenfields exploration track record and the spend in that regard. Ludwig, if I can ask you to please deal with the question on the dry stack tailings facilities, please.
Thank you, Christine. With respect to the greenfields investment or exploration programs and budgets that we've had over the past few years, we have been running at roughly $30 million a year, for the past four or five years. We've seen some new opportunities developing within our Western Australia and Nevada portfolios. We have incrementally increased those budgets to be able to accommodate additional drilling.
To the second part of your question, in terms of our strategic view on greenfields exploration, it's very much a portfolio management approach, where we are able to stake tenements and be able to take 100% control of targets at the right stage early on. We will, of course, make that a priority within our greenfields exploration portfolio. At the same time, if we recognize opportunities in the space that are in the right terrains or with the right companies in the right projects, that's where we also maintain that optionality to look at the opportunity for strategic investments.
Okay. Ludwig, if you can please handle the question on dry stack tailings and any future costs that we envisage in that regard.
Thank you. Yeah. Thanks for the question, Arnold. In terms of capacity, we've designed the dry stacking to match our current capacity. It won't impact the capacity. In terms of cost, obviously, there will be an element of operational cost that will be added. You should also remember that we offset the capital required for tailings dams lifts.
There's a bit of a balance on that. In terms of the material, we're going to stack mostly on top of the existing tailings. If you look at the footprint, you're also saving cost by actually stacking on top of your existing footprints. Also, eliminate some of the rehabilitation work or cost that is involved with that original tailings dam. Thanks.
Thank you very much, Tim and Ludwig. Cheers.
Irene?
Thank you.
Thanks.
Our next question is from Dominic O'Kane of JPMorgan.
Hi, guys. Thank you very much for the presentation. Very detailed. Just two questions. The first is maybe a bit of a broad question and goes back to the first question, which is, could you maybe just give us some insight to what you're thinking on risk mitigation for Gramalote and for Quebradona? Maybe some of the technical risk mitigation considerations that you've made and also maybe some of the sort of downside stress tests that you're thinking in terms of gold price and copper price assumptions.
In addition to that, could you maybe just comment in a bit more detail on power for those projects and how renewables are currently fitting into your thinking and the cost competitiveness of renewables in Colombia, given that it's a relatively virgin jurisdiction for gold mining? Yeah, those are my key questions. Thank you.
Thanks, Dominic, for those questions. Risk mitigation is at the forefront of our mind. As we look at our capital allocation framework and also in the way that we look at decision-making around projects, the criteria that we apply, I think bear in mind very prudent assumptions is part of the financial risk mitigation that we do apply on these projects. I have spoken a little bit earlier, to Shilan and about around financial risk mitigation options. I think built into that prudency, around the assumptions that we make.
Of course, when it comes to also the copper price assumptions, we've given the assumption, at the time of the pre-feasibility study, we said we've assumed $2.89 per pound of copper long-term price at that stage. Of course, it is largely a copper product, although there is gold content. You can see even in the price assumption that it's actually very conservative. Of course, this is very premium copper concentrate, and we have not factored that premium into the assumptions.
I spoke a little bit yesterday about the technical, social, and fiscal, but I am going to ask Graham and Stewart to talk more around the social aspects of the project. I think just broadly, this also, like you say, it plays very much into renewable technologies, and we're very comfortable around the long-term view, in terms of supply, demand, fundamentals around copper and the assumptions we've made on that. Of course, when it comes to technical, Graham will talk now, but I think for us, it's also in terms of how we've looked at both projects and how we've split our execution capabilities.
Bear in mind that B2Gold, being the JV partner on Gramalote, will be executing fully on that project. However, there is a management committee structure that we have in terms of joint decision-making around the project. I think it's very important because it's to ensure alignment, given the capital that we'll be spending there. From a technical execution capability perspective, bear in mind on Quebradona, our teams have actually executed on the feasibility study. We are ensuring we do already have significant technical capability in our company.
Obuasi is just about to be completed, and clearly there is going to be capacity in those technical skills that we will also be able to transfer to Quebradona. On the social side, we're seeing just good momentum in the social, let's just say, support for the project, social and environmental. Of course, the environmental and mining license are critical milestones that we'll have to meet before decision-making is made in that regard. Just overall, Colombia from a fiscal perspective, we're very comfortable with the fiscal framework in Colombia.
Like I've said, we've been there now for more than 10 years. We've developed also very good relationships with the government, with the ministries. So I think in particular, as regards fiscal assumptions in the project, we're not reliant on any capital allowances or any special sort of exemptions from the government, and that's actually quite important. In terms of the royalty structure, it's 4% on copper, it's 3.2% on the gold content.
Then, certainly when it comes to the tax rate that we're assuming it's 30% from 2022 onwards, that has been included in the project. No special requirements, like I said, for capital allowances. That's quite important that the project works without any special requirements or requests from the government. I'm going to hand over to Stewart first to social, and then Graham, if you can just please deal with the technical and the power renewables aspect of the project as well.
Dominic, just very briefly on the actual power generation side, 80% of Colombia's power installed capacity is hydro. The 20% thermal component, or actually just under 20% thermal is really, in most instances, just standby power capacity in the event of drought or other issues with the hydro baseload. The overwhelming power draw for this project will be satisfied by hydro. The price we'll come back to within a second.
On the social front, as Christine said, we've steadily been building support in the local community for the project. Obviously have a fairly elaborate set of programs to ensure that benefit is shared with the community, including development of a community trust, which ensures that benefit from the project goes directly to the community, not only to the national fiscus. We're happy to talk about that in a little bit more detail. If you watch the video after this Q&A session, some of your other questions will be answered as well. I'm just going to hand over to Graham.
Yeah, thanks, Stewart. Thanks, Dominic. I think Christine gave you a very full and comprehensive answer in terms of managing risk. I'll try and add to that in probably three parts. Firstly, we have quite a rigorous process in terms of how feasibility studies are conducted. We commence early on with concept studies. We move into pre-feasibility studies, and then we move into feasibility studies. At each time, one is refining the scope of the project and one's bringing more engineering effort to the project.
That by the time you've completed feasibility study, the project is not fully engineered, obviously, but it's well engineered such that the quantities, the cost, the equipment selection are very tightly defined and the scope of the project is tightly defined. The costs that go into the estimate are budget quotations, and also reflects the contracting strategy that will be used for the project's execution. In the case of Quebradona, we've used pricing from contractors that we would use within Colombia to give confidence to the capital estimate.
The next part would be to look at how one is going to build the project and how one is going to operate the project. From a build point of view, we'll undertake or prepare a detailed project execution plan. It defines not only schedule, but covers all the other elements from safety, environment, commercial procurement, through to construction management, commissioning, and so on. Quite a detailed approach to how the project would be built and how the team would be put together and how they would work together. The other element is the operational readiness plan.
One can build, one needs to operate. How does one put a team together? When does that team come together? How does the team work? What skill sets do you use? What are the operating systems that you're going to put in place? That's quite detailed work. That's done in parallel with project construction. That can often take quite an effort to put together so that when you're operating and ready to operate, you've got all the systems and people in place. We do some checks and balances in the course of all of that.
Obviously, the technical reviews with external experts, we have our own internal stage gate review process. Where we need a check with international experts, we bring them in, such as a mining expert on sub-level caving. As a final check on execution planning and readiness, we use the International Projects Association, who have examined capital projects across the globe and can advise and check whether we have got everything in place and whether we are ready to actually start the build. In that way, we de-risk the project execution. Thank you.
Thanks, Irene. Next.
Thank you.
Thank you. Our next question is from Adrian Hammond of SBG.
Good day. I've got three quick questions for Stewart, one for Ian, and two for Tim. Stewart, firstly, ESG is still quite gray in my mind in terms of all the metrics out there. How do you pick a benchmark given all the bodies that represent ESG? What are your top two ESG metrics that your shareholders are measuring you on? How do you benchmark yourself versus your peers on those metrics, and do you think it plays a part in your discount? On the ESG side of costs, you've given us some information on tailings. You've mentioned your intentions to cut emissions, et c.
What is the $1 per ounce cost on AISC? Is that something that's included in these forecasts? For Ian, you've got some money owed to you from the D.R.C. What are your intentions to do with that cash? Will some come to shareholders? For Tim, I was quite impressed with your exploration portfolio, but I don't find any conclusion as to where does that leave your reserve base in five years from now.
A lot of work being done, but does that allow you, is that enough to at least sustain your reserves and replenish them five years from now? I guess what's missing from here is that we've got a 2025 outlook, but we're also cognizant of your portfolio with short mine lives. Could you perhaps give us a color on, is that exploration enough to paint a picture beyond 2025? Thanks.
Thanks, Adrian. Let me handle those ESG ones first, and then I'll hand off to Ian. I think ESG being gray in your mind, you're probably not the only one. I think ESG as an intense focus for companies and for investors together at the same time is reasonably new. I think there's still a lot of attention being paid to or focus on what areas specifically matter. I think there's a statistic that gets bandied about a lot, which is about the lack of congruency between the different ESG ratings firms and service providers, given how fragmented that industry is.
Whereas you get credit ratings agencies between Fitch, Moody's, and S&P because of quite common frameworks in terms of analyzing credit risk for companies, you'll get similar ratings between those agencies for the same companies. That kind of close or that correlation does not exist yet amongst the ratings agencies. I think what you've seen recently is a lot of more consolidation in the ratings agency space, and that'll start to bring those together and start to help companies and ratings agencies come together with respect to what they're focused on.
That's still, I think, a work in progress for the industry. We don't have a specific area that we're focused on. I can tell you some areas that matter to us. Local procurement matters to us enormously because it matters to our host communities, it happens to our host governments. I think increasingly you're seeing it come into legislation in a lot of jurisdictions. There's a lot of attention, particularly in our Africa business, to make sure that we are putting as much benefit back into those local communities as possible. I think you saw the underground mining contract at Obuasi as a great case in point.
Huge amount of work happening at Geita as well on that front to make sure that the biggest chunk of your, or as big a chunk as possible of your procurement budget is going into first the local community and then the country. Local employment, ditto for that. If you look at Quebradona, huge focus to make sure that people in the town of Jericó, people in the province of Antioquia, and then Colombians more generally, those are the kind of levels of priority for employment. I think if you want that lasting social license to operate in the communities that you're in, that matters.
I think the days of flying in hundreds of expats in areas where their skills may not exist are really at an end. And you use expats on a target basis, and then you better have a plan to transfer skills as quickly as possible. Climate is obviously enormously important for us. Greenhouse gas emissions intensity, not on a per-ounce basis, but on a per-ton basis and then on an absolute basis, is something that is obviously front and center, not only for us, but certainly for a lot of our investors. If you look at the BlackRock letter from Larry Fink over the last two years, I think it really sort of underlines why that is such a big focus.
In line with that, it's making sure that our disclosure, in line with TCFD, is done. Some of our peers are doing it. We're certainly in that queue as well, and I think that increasingly, without unifying or having uniform disclosure around that, you're going to battle to remain attractive as an investment over the long term. In terms of capital or OpEx required to get to your emission targets over time, that's something that's a work in progress, and certainly we'll look to dovetail those medium-term targets with our existing capital plans to the greatest extent possible.
Some of it is around substitution. It's not just throwing out what you have. You'll transition to the greatest extent possible. In the near term, what the big focus on is mitigating climate risk. Again, you just have to look at what's happened in Texas over this last week or two, where extreme weather events create problems for existing infrastructure. It really is a big focus on what happens in inclement weather or heavy rain events, what happens in extreme heat, et c.
A lot of that is not actually hugely expensive. For example, on the wet weather, it's making sure that your drainage system's unblocked, that they're sufficient to carry large volumes of water, et c. We're busy doing all that detailed work at the moment, making sure that our policies are adequate to deal with it, and then that the oversight matches that too. It's on three, really on three levels, and it's not all about capital. We'll be prudent on that basis as well. I'm going to hand over to Ian, and hopefully I've answered your questions on the ESG, and Ian will take it from here.
Thanks. Adrian, thanks for giving me the question that I don't have to give you such a long response. Mine is probably very simple. We have indicated before that any cash lockup releases will roll into our free cash flow metric and dividend payouts. That definitely remains the intention. Any D.R.C cash that we manage to release in the next while would roll into our next biannual dividend payouts. As I've mentioned, from 2021 onwards, we start to do the payouts on a biannual basis. It will definitely run in there as we get it released. Thanks.
Great.
Tim.
Tim on exploration and the reserve base.
Yeah. Hi, Adrian. I think to cover your question, if you want to look at this next five-year window, one of the things we do have is, I had mentioned that we have an exploration process that we use to plan and prioritize our targets. And that's actually something that allows us to look at planning not only the activities, but also the funding that goes with it, that's linked to the expected target advancement and eventual ore reserve addition as it moves through the pipeline of establishing an inferred resource, upgrading that inferred resource to measured and indicated, and then eventually moving it forward into an ore reserve.
Each of our mine sites following this process, and Vaughan will actually speak to it in more detail later. Following that process, we're able to give an outlook within, or have an expectation within our exploration processes of being able to replace depletion within our portfolio, by staying on track with our programs. When you look at, I think you had a second question with regard to our ability to sustain that five years out.
If you look at a lot of our deposits, the portfolio has quite a few underground mines in it, compared to where we were, say, five or six years ago. While some of those underground mines may have what appears to be a short mine life, if you look at those mines, they're 20-year-old mines that have had essentially the same sort of reserve profile for 20 years. Where we're investing our additional strategic funding into the program right now is to be able to push that ore reserve development out farther. By pushing that ore reserve development out farther, that gives us the ability to extend that life out from sort of the three-year into the four or five-year range.
Thanks. Just while I have the floor, you've done well to go from nine to 11 years on life of mine, many of your senior peers would say that premiums are sort of a 14.5-year level, largely because of single assets getting them there. Do you need a single asset discovery to take you there, do you think you can get there through what you're doing with the multiple portfolio approach?
I think we're in a fortunate position compared to a lot of our peers because we do have the robust brownfields exploration programs that essentially are able to sustain the assets within that portfolio. In some cases, we have the opportunities for growth. One of the things that you'll hear about later in the presentation, and was mentioned yesterday in the results call, was the addition of a brand-new open-pit mine at Geita, Nyamulilima.
We have these types of opportunities within our portfolio, and we continue to advance them through new discovery. We also carry the benefit on our greenfields portfolio of being able to add a new discovery, whether it's a Tropicana, a Gramalote, a Quebradona, a La Colosa, or other projects. They come through on a fairly regular basis, about every five, six, seven years, that a new one of those projects comes into the portfolio that is a meaningful new single-asset discovery.
Thanks very much. Irene, we're gonna just go straight to the webcast. There's a few questions. We're mindful of keeping to time. What we're gonna do, please, if you'll indulge us, is move some of those questions to the Q&A session at the end of this session. I am gonna ask just a couple off the line, starting off with Marcelo Kim from Paulson, who says, "In your 2025 guidance, which includes Quebradona, have you incorporated an all-in sustaining cost guidance using copper as a by-product? If so, what is the impact?
Stewart, in 2025, the uptick in Quebradona is very minimal, so it has really a very small effect on that AISC number.
Got it. Beyond, Ian?
Beyond that, we will disclose, as I've indicated, we will look at Quebradona as a copper project and disclose in guidance going forward a copper AISC separated from the rest of the portfolio, which will have a gold AISC.
Great. Another one from Jonathan Bloom at Bullion Top Investments says, "Given the exciting reserve additions at Geita and Obuasi, could you please look at issuing 43-101 reports on these mines?" Jonathan, I'll tell you what, we'll come to that with Vaughan Chamberlain, who's gonna speak about MRM in just a few minutes. The final question then will be from Lonwabo Maqubela from Perpetua. He says, "Can you expand on your project team's ability to deliver on the projects in the pipeline?" I think, Graham, maybe we'll throw that one over to you.
Thanks, Stewart. Thanks for the question. I think maybe the best example there is to look at our track record and in terms of project delivery. The Tropicana project was built from around 2013, or sort of commissioned in 2013. At the same time, we worked successfully with Randgold at the time on the delivery of Kibali. Randgold were the operator. As we move into Colombia now, we will be the operator and manager for Quebradona, and we'll work with B2 as the partner and operating partner for Gramalote. That focuses our effort.
Tropicana was very successful as a project, and subsequent to that, it's gone through a number of upgrades, also done successfully and also managed by AGA. We're just coming to the final laps on Obuasi. Obuasi was a very complex project, probably one of the more complex than a greenfields project because it was very much a rebuild and a redevelopment as well as a new construction, and we're progressing on that successfully.
I think the track record sort of demonstrates that we have the capability to deliver the projects. For Quebradona, we've already got a pretty experienced engineering team in place. The person leading the feasibility study is a seasoned project manager within South America and North America. We'll get continuity with that team rolling into the project.
We'll work with selected EPCM contractors who have also been involved in the feasibility study. I think in terms of the people that we partner with for the builds, and our own owners, teams, and experience, we've shown that we've been able to deliver these projects in the past, and we'll be able to deliver them in the future.
Thanks, Graham, and Lonwabo, thanks for the question. Irene, I think we're ready to go to the break now, and we'll be back in 10 minutes. Over that time, for those of you who are interested, the Quebradona video will be playing. Yeah, we've got some exciting information coming up next with the operations. Thank you very much.
[Presentation]
Welcome back, everyone. We at AngloGold have developed a system for ensuring that our exploration activities are focused on maximizing the value to the business, and that all our answers are delivered into the business plan and ultimately brought to account. The system is known as Exploring for Value or E4V, and in order to maximize value, we had to establish the system that goes beyond the norm, that being the SAMREC Code, and allows us to bring into play at a very early stage, very low confidence material in order to ensure that our exploration pipeline can deliver into the life of mine plans at the right time and at the right level of confidence.
The system allows for the capture of geological understanding from the very earliest stages of development. The system runs from the lowest and most inclusive category, named endowment, which is an estimate of the inventory of all the gold in a lease area and its immediate surrounds. With increased geological information and understanding, the confidence levels increase through a series of steps to an ultimate estimate of produced ounces. In effect, each category is a subset of the previous category.
It's almost like peeling an onion, in that we are systematically removing the discardable material and exposing the core of the good stuff, in this case, the gold bars. We also adjust the estimates included in the plan for the level of confidence we have in it up front. For materials classified, for instance, as endowment or blue sky intangible, we would adjust for the probability of occurrence, the probability of conversion to a mineral resource, and the probability that that ounce would be mineable and convertible therefore into an ore reserve.
Finally, for the metallurgical recoveries. In the case of a blue sky intangible ounce, the overall plan conversion could be as low as 10%, whereby the plan conversion for an inferred mineral resource could be as high as 80%. These conversion factors are tracked, reconciled, and used in future planning. They account generally for geological uncertainty in a plan and reflect the complexity of the ore body, the exploration maturity of that specific site, the skills of our geologists, and ultimately the mining style, be it open pit or underground.
Keeping track of the incremental costs of exploration studies and construction allows for more accurate cost planning. We maintain these records and use them in our planning. On the slide, we show the group average based on the last 10 years, including both greenfields and brownfields. More detailed records at an operational level or regional level allow for the granularity to local planning, but these numbers serve as a good check. Besides integrating our E4V process with our life of mine planning, we also integrate the process with our stage gate reviews process and our accounting standards.
As an area is explored and drilled, a series of stage gate reviews and appropriate economic studies are used to justify the next level of exploration. The size of the area naturally controls, to an extent, the scope of the study. For example, a large greenfields discovery will require a full series of studies, moving from early scoping to a conceptual study and ultimately all the way to a feasibility study, naturally assuming that it passes all the hurdles on the way. Each of these steps will be associated with the required level of confidence in the material to be mined and will undergo a defined stage gate review.
Naturally, in the case of a small underground extension, for instance, in a brownfields operation, the studies would be infinitely less detailed, but would nevertheless be required. The process therefore ensures that funds are not expended on areas that will not report into the business plan and add value as produced ounces. The integration with the business planning is also designed to set the timing for the exploration.
In order to maximize the return on exploration investment, the timing of drilling campaigns is critical in order to ensure the delivery of ounces at the required time. Part of the skill in using our E4V process is to recognize that a level of flexibility is always required to cover for the failure of a process to deliver. It can also not be rigidly applied, as this may shut off the opportunity for step change discoveries at an operation or within a project. To this end, some long-range exploration targeting very low confidence concepts may still be appropriate.
In our planning process, we include material falling into all categories but have rules controlling how much of the lowest confidence material can be included in the early years. We minimize inferred mineral resource in the first two years and try to delay the use of blue sky material for as long as possible. The requisite exploration planning for the upgrading of the confidence levels is an integral part of our planning process. In the case of blue sky, the plan would be for a full exploration program to move the material firstly to an inferred mineral resource, and then onward to an indicated mineral resource to allow for mine planning and ultimately to allow for reporting as an ore reserve. We would also plan for additional infill drilling that might be required to provide further confidence to the plan.
This includes advanced grade control and grade control. All of these costs are then incorporated and included in the life of mine plan. The E4V process ensures that our exploration is done just in time and that we don't spend monies too early, except in the case where we are chasing a step change for the operation and need to prove up sufficient material to support the capital required to implement the step change project. Moving forward onto our ore reserve process.
Obviously, this is a subset of our life of mine planning. We control the process with the Mineral Resource and Ore Reserve Steering Committee that is staffed by all our senior technical competent persons and relies on internal, regional, and group reviews and audits to provide us with confidence for the reporting of our ore reserve. Each operation is audited externally on the average every three years by an external auditor, and all our operations have Competent Persons based on site, one that looks after the Mineral Resource and another to look after the Ore Reserve. We do regular ongoing training of our Competent Persons to actually enhance our confidence on the overall process.
The Ore Reserve reconciliation, which is shown on this slide, is a standardized process which incrementally changes parameters in a defined way from the previous year's Ore Reserve to the current Ore Reserve by changing only one of the modifying factors at a time and quantifying these changes. This chart serves as an example, moving from 2019- 2020, and the categories are defined as follows. We have depletion and exploration, which are really self-explanatory. Methodology quantifies the changes due to estimation processes where no new data is present.
Price captures the changes due to any change in ore reserve price or exchange rate, whereas cost reflects changes resulting from reduction or increases in the actual cost base at the operation. Geotechnical parameters and metallurgical changes are pretty much what we would expect. While operational changes then encompass changes due to issues such as selection of the revenue factor for open pit mine planning, ground instability, access, mining width, or just a process to ensure future access to a specific area.
The other category is really a catch for anything that has not been picked up, and these numbers are generally very low. Just on an aside, we're planning to move our reporting in terms of our listing in the U.S., from Industry Guide 7 to Rule S-K 1300 next year. This is pretty much a global process that all mining companies listed in the U.S. will have to follow as well. AngloGold Ashanti maintains a monthly group view on the reconciliation of our produced grade and tonnage relative to the mineral resource. This reconciliation provides, on an annual basis, the reconciliation factors which we need to improve our life of mine plan and its subset ore reserve.
The reconciliation assumes that our planning is pretty much perfect, and then it measures the accuracy of the mineral resource modeling relative to our grade control processes, the efficacy of our long-term planning process, the congruence between the long-term planning and the short-term planning, the amount of dilution and planned ore loss that we incur in our planning process, the efficiency of the actual mining or extraction process, i.e., how much unplanned dilution or unplanned ore loss is incurred.
We look at stockpile management processes and the mining actual movements. We look at the overall production tracking process, the efficiency of the plant measured primarily by the metallurgical recovery. We also measure the overall effectiveness of planning via a long-term factor and a short-term factor. These are very similar to what is traditionally called a mine call factor. Using the outcomes of this process and feeding back into the planning process, we're able to improve the overall efficiency and confidence of the planning process and of the reporting of our ore reserves. With that, I'll hand over to Sicelo.
Thank you, Vaughan. Good day, everyone. We will now look at the Africa portfolio. The Africa portfolio has been transformed with the sale of South African assets and the Mali assets. This deliberate and decisive action has resulted in a focused portfolio with three world-class assets in Geita, Obuasi, and Kibali, and two steady-state assets in Siguiri and Iduapriem, further strengthening our position as the continent's largest gold producer.
All five assets have upside potential, and production is expected to increase by 20%-30% over the next five years. Today's presentation will showcase where the potential lies at each asset and our plans to unlock value for all stakeholders. Starting with Geita in Tanzania. Geita is a world-class asset which has historically produced on average 500,000 oz for the last 20 years and is set to continue at similar levels in the medium term.
However, 2021 is a transition year at Geita of bringing in the third underground mine, which is Geita Hill, and also bringing in a new open-pit mine, which is Nyamulilima. Geita has, over the last four years, consistently improved production whilst improving on costs and ensuring a disciplined capital allocation approach. This solid performance has been achieved whilst leading in world-class safety matrices, transitioning to underground operations, achieving the third highest produced ounces in 2020, increasing the reserve base by 1.4 million ounces at a cost of only $35 an ounce with more growth opportunities available.
The key to unlocking Geita's potential is ore reserve conversion, both from underground and open pit. 2020 was a very successful year, with 1.4 million ounces added to reserves before depletion. Our aim is to continue with this level of performance and funding. This success has increased Geita's reserve life by two years to five years, which provides a strong foundation and allows us to prioritize our exploration program to effectively target the conversion of 5.41 million ounces of exclusive mineral resource to reserves.
Mineral resource and ore reserve growth targets will be unlocked from detailed, efficient, and adequately funded exploration programs that will focus on down-plunge and strike extensions of main deposits at the three underground operations. Nyamulilima open pit satellite targets, as well as the Matandani and Kukuluma terrain of refractory deposits. The above upside potential will provide opportunity to maintain full plant throughput to 2034. Exploration all-in cost of approximately $35 an ounce for a new ore reserve addition was achieved for the last five years, and this is expected to continue in the medium term.
As mentioned, 2021 and 2022 are transition years for Geita. We will have a dip in production from 2020 levels as we bring in the third underground mine, as well as bringing in the open pit. From 2023 onwards, production normalizes to between 500,000 oz and 550,000 oz per annum, with a commensurate decline in all-in sustaining cost. Over the last five years, we have been able to successfully grow open-pit reserves as well as from the underground reserves. We are confident on being successful on the exploration program and incrementally increasing the reserve life towards the 10-year target.
Nyankanga is a good demonstration of our exploration process and how we have converted mineral resource to ore reserve over the years. It clearly shows the success over the last four years, incrementally understanding the potential of the ore body and opening up further mining blocks. Since underground mining started in 2017 at Nyankanga, over 1.2 million ounces of ore reserve has successfully been converted, and we plan on continuing on this trend. Since the initiation of underground mining at Star and Comet complex in 2015, 617,000 oz have been mined.
Established production and exploration platforms at Cut II and III ensure that down-deep extensions are drilled out. Based on current exploration intercepts, similar grades are expected in gap areas of Cut IV and Cut V being explored. There is further opportunity at Ridge 8 Deposit to bring this entire ore body together and unlock its fullest potential. As previously announced, Geita Hill permitting has been granted to access this vast ore body. The first portal has been established in Block one, with development now 50 m into the ore body to establish drilling platforms.
A mineral resource of approximately 4 g/ton in Block One is expected to be converted from underground drill platforms. Also, down-plunge extensions will be tested from these underground platforms. In total, the Geita Hill Underground Project offers the potential of converting a largely inferred mineral resource of approximately 1.5 million ounces. We are very excited about Nyamulilima in terms of the potential that it brings as a new open pit to supplement the underground operations and the district potential as a whole.
Environmental permitting for this project was obtained, and the mining plan approval process is in progress, with mining expected to commence during the second half of 2021. Almost 1 ,000,000 oz of ore reserve were declared at the end of 2020 from Nyamulilima, extending open-pit life by five years and providing the necessary source to fill the plant to full capacity. This highly prospective area within the district is being prioritized over the next five years, with a reasonable likelihood of finding another similar-sized open-pit mineral resource and ore reserve.
In wrapping up Geita will be a combination of three underground mines producing approximately 120,000 oz each annually and an open-pit mine producing approximately 140,000 oz annually. An aggressive open-pit and underground exploration strategy is in place to ensure a timely conversion of ore reserves and achieve the targeted 10-year-plus reserve life and then grow it further. Moving to Kibali. Kibali is located in the northeast D.R.C. It is an underground and open-pit mine that is a joint venture between AngloGold Ashanti, Barrick, and the D.R.C gold mining parastatal, SOKIMO.
It is operated by Barrick. First gold was poured in September 2013 from the open-pit operations, while development of the underground mine also commenced in 2013. The underground project was completed in 2018, and since then, the mine has been in steady-state operations, producing approximately 360,000 oz annually of attributable gold at an all-in sustaining cost of $800 an ounce. The mine has a potential life of mine of over 15 years, with 4.25 million ounces of ore reserves and an additional 2.65 million ounces of exclusive mineral resource.
The base plan consists of primary production from the KCD underground operations, supplemented by a number of open pits, with the tonnage split between underground and open pit around 50%, 50%. Kibali is a steady-state producer and has a steady production outlook. With a plant capacity of 7.2 million tons per annum and an underground mine constrained at around 3.6 million tons per annum, the short-term strategy for the mine is to maximize underground production while supplementing plant throughput with open pit ore sources.
Kibali has a robust exploration pipeline in place, targeting to replace resources and reserve depletion annually. The plan on the left shows the main exploration KZ Trend extending 40 km north and south from the main KCD mining complex in the center. Extensive exploration has taken place along this Trend over the last few years, highlighting its prospectivity through new finds such as the Kalima and Ikamva in the north, in support of the mining strategy. The picture on the right is a zoom-in of the KCD mining complex, showing the KCD ore body as well as the underground workings and open pits.
The underground exploration at KCD is focused on delineating down and up plunge extensions along the KCD corridor. Moving to Siguiri in Guinea. Following the initial challenges with the commissioning of the combination plant, I am pleased to say that the operation is now stabilized, and we are now shifting our focus on growth opportunities such as Block 2, which we plan to bring in during 2021. The operational improvements will come with a declining cost trend towards the $1,100 per mark and below.
We have an exploration strategy to bring in new oxide and sulfide deposits to extend the reserve life. The exploration strategy will simultaneously target short, medium, and long-term potential. The short-term strategy is ore reserve conversion at Saraya and Foulata from Block 2 and Bidini pit in Block 1. I will talk to this potential in more detail shortly. The medium term is new mineral resource conversion targets at Kossise, Kozan, and Seguelen pits.
This plan will further be supported by an aggressive exploration plan in Block 3 to pursue growth potential from Kounkoun and surrounding areas. With regards to the combination plant, I'm happy to report that the initial challenges with the commissioning have been successfully completed, and the project has been officially closed out. As you can see, the recovery is currently exceeding design parameters for the February month- to- date, which is a massive turnaround and demonstrates the bench strength of our technical teams.
These improvements, however, did not come without challenges. There were significant process modifications and new equipment installations to overcome the geometallurgical recovery challenges experienced. With the combination plant now having reached stability, the focus is on commencing Block 2 execution, and we are confident of an increased production outlook for the next five years.
Siguiri has great sulfide potential with some good intercepts in Block 1, as can be seen on the first cross-section. Studies will be carried out to test the feasibility of further cutbacks. Two main ore bodies currently exist in Block 2, namely Foulata and Saraya, with a reserve of 314 kg oz declared in 2020. The project is now in execution phase, with the mining schedule to start in the second half of the year within the current stability agreement window called the Convention de Base. In addition, the possibility of sulfide extensions will be tested at Block 2.
Lastly, moving on to Iduapriem in Ghana. The operation is in a favorable jurisdiction and has been a solid performer, consistently exceeding expectations. For the last decade, Iduapriem has been growing production, achieving record production levels, particularly in 2019 and 2020, with an all-in sustaining cost well below $1,000 an ounce. After a strong 10-year run, this operation is now embarking on a three-year investment cycle to secure its future by stripping the major pushbacks in the main pit and the construction of a TSF and retained water dam.
This investment is expected to increase the reserve life to 2032 and beyond. Iduapriem has a significant endowment in exploration potential. Iduapriem reserve base is very sensitive to cost, and any reduction in cost will unlock reserve potential, and this is what we are focused on delivering. Whilst reinvesting for the future, Iduapriem's production is expected to reduce over this investment period but expected to exceed current levels post the investment period. To further enhance Iduapriem's values proposition, we are in the process of awarding a long-term mining contract, which will enable the mine to unlock costs and unlock further value.
We are also finalizing studies investigating the opportunity to increase the plant throughput from the current 5.2 million tons per annum to 5.8 million tons per annum by 2024. With the first phase of installing a tertiary crusher to the current circuit being completed in the second half of the year. Our concluding slide in the Africa region is an illustration of the cutbacks that support Iduapriem's life of mine, as mentioned earlier.
Importantly, the pit has high confidence resource levels with more than 90% of the material in the measured and indicated category. Ladies and gentlemen, this concludes the Africa portfolio. In summary, the portfolio is focused. We have a prioritized exploration program. We are allocating capital adequately. There is a clear pathway for growth. The ESG lens and our values will continue to guide our actions. We are collaborating with our host communities and governments, and we have the right skills and teams to get this done. I will now like to hand over to my colleague, Ludwig, to give us an overview of the international portfolio. Thank you.
Thank you, Sicelo, good day, everyone. As Sicelo said, I'll be giving a brief overview of the international operations. I'm starting with Australia. We have two Australian assets located in the eastern goldfields of Western Australia, where we have operated for 25 years. I would like to start with Tropicana Gold Mine, a joint venture in which AngloGold manages and holds 70%. Tropicana has produced almost 3.5 million ounces since it was commissioned in 2013. It's worth noting that the mine life of Tropicana has been extended by seven years.
In mid 2020, the operation moved from mill constraint to being mine constraint as grade streaming came to an end. Production has been supplemented with lower grade stockpiles. You will see this reflected in the lower gold production and higher costs last year. Tropicana is entering an exciting new era. I'm pleased to report that in 2020, we successfully established a new underground mine below the Boston Shaker open pit. The Boston Shaker underground will contribute higher-grade mill feed and improve future gold production, enhancing cash flows for this year while we are stripping the Havana open pit.
From 2022, together with the ore mined from the Havana Stage II open pit, will support the mine to bring production back to historical levels by around 2023. The underground mine will reach full production of 1.1 million tons later this year and contribute around 100,000 oz a year to the gold production. There are a number of other opportunities at Tropicana, including a trade-off study to determine if we should mine the deeper Havana ore body with a cutback or from underground.
We expect to have a decision on this later this year. There's also significant potential to unlock known ore body extensions beneath the Tropicana and Havana open pits, as well as extensions at depth at Boston Shaker underground. In addition, there are various satellite open pits opportunities along the mineralized corridor to the north at Springbok and Angel Eyes, to the south at Crouching Tiger and Rusty Nail, and even further south at Madras and New Zebra. This view of Tropicana's system, looking west, showing the Boston Shaker, Tropicana, Havana South pits, stretching out over a strike length of 5.5 km.
We have complemented development of a 500 m underground drive off the Boston Shaker decline. This is indicated by the black line on this picture from Boston Shaker to Tropicana. The diamond drilling is well advanced and to drill beneath the Tropicana and Havana open pits. Moving to Sunrise Dam. The strategy is simple. Fill the processing plant with the best possible ore. We are focusing on aggressive underground development, exploration, drilling, and to build ore body knowledge, add Ore Reserves, and create additional mining areas.
This includes maximizing the extraction of the main ore body and also developing additional mining areas to deliver around 3 million tons per annum, yielding gold production of around 300,000 oz. Currently, Vogue, the anchor underground ore zone at Sunrise Dam, contributing about 80% of the underground ore, supplemented by low stockpiles. This will be supplemented in 2021 by the new Golden Delicious satellite open pit, situated 12 km from Sunrise Dam and within trucking distance. Mining has progressed well, and we are on track to deliver first ore by mid-year.
Golden Delicious ore will displace low-grade stockpile material in the second half of 2021, to be followed by a number of highly prospective targets. We expect steady production over the short term, followed by an increase of production to around 300,000 oz as we displace lower-grade stockpile material with run of mine ore. This will enable us to offset the fixed cost of the mine and lower the overall unit cost. Looking ahead, Sunrise Dam's story is one of endowment, and exploration is critical to its future. We have an aggressive program underway, which will see us spend about $60 million on drilling over the next couple of years.
We have currently 11 underground drill rigs in action, along with six grade control rigs. This drilling has already identified the exciting new Frankie ore body to the north and significantly extended the Vogue and the Carey Shear ore zones. Multiple ore zones remain open along strike and depth. This slide demonstrates the exploration successes over the last years with expansion of existing ore bodies as well as new discoveries. I'm particularly excited about the discovery of the Frankie ore body, located close to the infrastructure and to surface, which will significantly reduce costs.
Based on the initial results, Frankie has the potential to deliver approximately 500,000 tons of ore per year, starting in 2023. Frankie is open in all directions. There are other highly prospective targets around Frankie, which we plan to fast-track into production. We are also exploring for additional satellite ore sources similar to Golden Delicious, which will be within tracking distance of the Sunrise Dam processing plant, along with the Butcher Well, a JV with Northern Star, in which we have 70% shareholding.
Moving to Brazil, I will start with the AGA Mineração, which includes all of the AngloGold Ashanti operations in the Minas Gerais state. The largest asset is the Cuiabá complex, which accounts for about 70% of production, along with the Queiroz metallurgical plant and the smaller Córrego do Sítio complex. Gold production has been stable over the past three years at around 360,000 oz, despite a decrease in average grade. It's pleasing to report that all these operations set new records for development and processing in 2020, which positions us well to increase the production from 2022.
Key to the future is the conversion to dry stacking tailings, and this is planned to be completed during the course of this year. Over the short term, the focus is on increasing confidence levels of existing resources and adding new proven reserves. The current investment in ORD will create flexibility and open up high-grade production in the deeper levels of the mine. Looking ahead, AGA Mineração has a potential life of 11 years when taking into account measured and indicated mineral resource.
However, the total endowment is significant at 48 million ounces, 29 million ounces for Cuiabá and 19 million ounces for Córrego do Sítio, and exploration remains key to unlock this potential. As mentioned, the near-term exploration focus is on resource conversion and main orebodies in Cuiabá, which will create flexibility in the upper and lower levels of the mine. There are also a number of exciting new targets in Cuiabá, including the Abraxas near-mine target and this go back to exploration target, which is expected to deliver significant additional ounces in the medium term.
Exploration is also a key focus for Córrego do Sítio complex, and the intention is to confirm the current geological through an accelerated exploration program campaign across multiple targets. Looking more closely at Córrego do Sítio, the declared mineral resource in 2020 was 3.6 million ounces. However, the total endowment is around 20 million ounces, as mentioned earlier. It's exciting to note that there have been encouraging intercepts at depth, which confirms the strike and the down-plunge of all the main production ore bodies and the near-term intentions to grow the mineral resource.
These are ore bodies like Laranjeiras, Cachorro Bravo, and Rosalino. At Cuiabá, historical production has reached 6.8 million ounces, and mining is currently at level 19. The ore body is in a contiguous geological structure, which is open at depth, with positive drill results from both main ore bodies, as well as parallel narrow veins. As noted earlier, there is also a potential for further supplementary production from parallel ore bodies, new satellite ore bodies, and near mine targets like Disco Berta. Staying in Brazil, we have the Serra Grande mine located in Goiás State.
Serra Grande produce about 130,000 oz from both underground and open pit, noting that 84% of the gold production is from underground. Like the other Brazil assets, exploration remains key to the future growth of MSG, with a specific focus on improving the geological confidence in the near-term plans. Context, Serra Grande was a 50/50 joint venture, which became 100% owned in 2012. At this stage, the life of mine was approximately five years based on the inferred material. After AGA acquired full ownership, it implemented an aggressive exploration strategy, resulting in the current expected potential life of mine of 15 years plus, based on measured and indicated mineral resource.
The production will be steady over the short term and increase on the back of higher mining volumes that will enable us to grade stream. The key focus for Serra Grande is the continued investment in exploration to add underground high-grade ore bodies and unlock open pit sources. We already had a quick win last year where we increased the mine reserve by 53%. This is critical to support the growing production from the current 130,000 oz to a sustainable 160,000 oz including exploiting the Palmeiras Sul tenement. A plant expansion can even be on the cards for the future, pending the success of the exploration program.
For now, we'll focus on the ore reserve conversion and maximizing grade to the plant. Historical production at MSG has been 4.6 million ounces, the deepest sub-level is 990 m below surface. The surface and underground exploration drill campaign has successfully confirmed the down-planned continuity of almost every orebody, with the positive results in mines three and four. In addition, the discovery of the new orebodies, including Palmeiras Sul, has consistently grown mineral resource. There's also significant open pit potential, which will help increase operational flexibility in the mine, including the mine three open pit, which will start production in the second half of this year.
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Moving to Argentina.
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We have the Cerro Vanguardia mine in the Santa Cruz province of Patagonia. This mine has contributed substantially to the company over the years, with low costs and healthy free cash flows. Following the decision not to sell the mine, we renewed our focus on the asset from exploration and investment position. More recently, Argentina has been severely impacted by COVID in the form of closures and travel restrictions, which impacted the production and the cost in 2020. The situation is managed well by a very experienced management team, and we are hopeful to return to normal operations soon.
In 2020, CVSA produced 187,000 ounces of gold, but also 3.8 million ounces of silver. It is noteworthy that the ratio of silver to gold production is 22:1 , and this is expected to increase to around 24:1 this year, taking advantage of the high silver prices. Now that the decision has been taken to keep CVSA in the portfolio, we have launched an aggressive brownfields exploration strategy to grow resource and convert reserves, targeting an additional 2,000,000 oz of resource. This includes the addition of various tenements in our portfolio after a successful agreement with our partner, Fomicruz, which consolidate our position in the region.
We've already seen successes in the program last year by increasing reserves by 23% after depletion, and we're confident that this will continue to increase the life of mine in the years to follow. Production is expected to be flat over the next couple of years while we follow our exploration program and invest in the tailings dam lift at new heap leach and the mind fleet. You still expect a healthy cash margins while investing back into asset. Investment will turn the mine to traditional volumes over the next two years.
The current related situation out Argentina a s I mention i s adding complications to the team on the ground, but with this experience team that has proven themselves last year, I'm quite confident that they will be able to handle. This exploration program at CVSA is aimed at extracting all remaining value from the asset. This slide shows the success of mainly last year's exploration, extending our current ore bodies. The short term target is to add around 400,000 are preserved in 2021 in Osvaldo and adjacent ore bodies. Over the medium and longer term, the drilling program will extend to the tenements quiet that are within tracking distance of the mine.
Looking ahead, our intention is to add 1,000,000 oz of gold and 7,000,00 oz of silver reserves over the next three years. International operation has a clear path to create value by continuing our commitment to safeguarding Health, Well-being, and safety of our vehicle, driving our operation excellence program to continuously improve costs capital inefficiencies, improve resource cost, confidence, and driving near-term reserve throughout exploration training programs. Develop new projects with. This will add low cost production to the portfolio. And use technology to strengthen our and improve our metrics on ESG. Lastly, we have a highly skilled and motivated team to deliver on all these commitments. And with that I'll hand over to Graham.
Thank you, Ludwig. Today, I'll cover Obuasi, which is 90% through construction, and our two Colombian projects, which are in the late stages of their feasibility studies and permitting. Obuasi's redevelopment was approved in 2018. The project is rebuilding all aspects of the operation to deliver a modern, efficient, mechanized underground operation. Since approval, all reserves have increased from 5.9 million ounces- 8.7 million ounces. Phase I, to achieve a capacity of 2,000 tons per day, was completed in 2019. The first gold pour was celebrated on schedule in December 2019.
Phase II, to achieve a capacity of 4,000 tons per day, is 90% complete. There is a third phase from 202- 2023. This is to refurbish existing infrastructure and construct new infrastructure to support the underground mine as the mine progresses deeper. I'll recap on the project dimensions. Obuasi's redevelopment is underpinned by a suite of agreements with the government of Ghana, which is being ratified by parliament. A key measure for the government of Ghana and the Obuasi community was that there'd be substantial and meaningful Ghanaian participation.
I'm pleased to say that the project has met and even exceeded these expectations. 80% of the project spend has been with local and multinational companies registered in Ghana. 97% of the project and operational workforce is Ghanaian. Where international companies participated, business partnerships were established with local companies to develop Ghanaian capability. Our social management plan is aligned to the Sustainable Development Goals that Stewart discussed earlier. As an example, AGA facilitated the establishment of the Obuasi Campus for the Kumasi Technical University using the former management offices and Obuasi Sports Complex.
We're also on schedule with rehabilitation of old areas. The old treatment plant and shaft area in the north have been completed. Obuasi is a long life mine. Reserves already cover over 20 years, and there is plenty of scope to extend the mine life. Gold production ranges from 350,000 oz-450,000 oz per annum. At the lower end in the first 10 years and the higher end in the latter 10 years, when the high-grade areas of block 10 and block 11 are mined. All-in sustaining costs are expected to be around $725-$825 an ounce in 2018 terms. Taking a closer look at the next five years, construction and commissioning of phase II will be completed in the first half of this year.
This includes the process plant and associated surface and underground infrastructure. We are targeting ramp up to 4,000 tons a day, but this is a tight schedule and may overflow into Q3. The ramp up is progressing somewhat slower than we had planned due to the second wave of COVID, which hit Ghana and Obuasi in early January. This is impacting mining in particular, with key operating staff in quarantine or isolation. Nevertheless, we expect to achieve steady state production in the second half of this year.
This slide shows the distribution of mineralized resource category. Note that a high proportion of the resource is in the indicated and measured category. In other words, the high confidence category. As mining progresses, we will infill drill the inferred and blue sky areas to convert these to measured and indicated. This slide illustrates the grade distribution on a long section of one of the three Obuasi mineralized structures. The actual and planned decline development is illustrated in black. Broadly, the mining sequence follows the decline development downward.
Though we will be mining areas concurrently to have two or three mining areas active at any point in time, mining at Sansu commenced in 2019, and Block 8 commenced in 2020. Block 9 and 10 are scheduled for 2023, and Block 11 in 2025. This is when we hit the high-grade quartz veins and we'll see a lift in gold production. Note that the two main cleansing structures have not been closed off and offer opportunity for the future. Obuasi ore is refractory, and the process plant uses flotation and bio-oxidation. The plant has now been operating for a year, now at 2,000 tons a day. Metallurgy is good, and the recoveries are in the mid to high 80s.
We are commissioning the phase II plant now. This brings gravity recovery, flash flotation, and concentrate regrind into the flow sheet. This will lift recovery further to the high 80s. Pictures tell a 1,000 words. The main phase II process plant circuits are being commissioned, including crushing, milling, flotation, BIOX, CIL, and the new gold room. We're now bringing on the gravity/flotation and regrind circuits. The KRS shaft and underground conveyors are being commissioned. We are now commissioning the shaft automation, the underground materials handling system, sizing, grizzlies, rock breakers, and ore passes.
Yet to be completed in this half of the year are the second underground materials handling system, the new ventilation shaft and fans, paste fill plant, and the underground fiber data network. In terms of surface infrastructure, the BIOX, TSF, water ponds, and emergency generators have been completed. Areas in progress include the new high-voltage switchyard, the power factor correction, fire protection system, stormwater drainage, and demolition of the remaining old and redundant facilities. To wrap up on Obuasi, the mine has a very bright future, even beyond the current 20-year mine life.
The redevelopment has addressed all the legacy issues of the past. We're on the final lap of the redevelopment. The pandemic's presenting some challenges, but the team is focused and determined to deliver what has been promised. Now turning to Colombia. Quebradona is an exciting copper-gold project. This is an AngloGold discovery and is 100% owned. We are in the late stages of completing the feasibility study and are well advanced on permitting for both the environmental license and the mining permit. The mining tenements are secure, and the land required for the development has been acquired.
Construction would take approximately four years, starting first with the underground access tunnel development, then the ore body development and process plant construction. Quebradona is a high-grade, high-quality copper-gold porphyry deposit. Quebradona will diversify AngloGold into copper, a commodity that is often associated with gold and requires similar mining and on-site processing technologies. You would note that several of our peers are also diversified into copper. In terms of global trends in urbanization, renewable energy, electric vehicles, and climate change technologies, the outlook for copper in the long term is very bright.
Quebradona improves AngloGold's portfolio. It provides production growth, will have a positive impact on the all-in sustaining cost of the group, and diversifies our currency and jurisdictional risk. With reserves of 3.1 billion pounds of copper and 2.5 million ounces of gold, average annual production is expected to be 130 million pounds of copper and 67,000 oz of gold for 23 years. The mine is an underground sub-level caving operation. The process plant uses conventional grinding and flotation to produce a copper gold concentrate, which will be sold into the global copper market.
The cost of copper production is expected to be around $1.10 per pound after gold credits based on a $1,300 per ounce gold price. Capital costs are expected to be around $1.3 billion-$1.4 billion, spent over four years. The returns on the project are very attractive at conservative copper and gold prices. The feasibility study is based on a single ore body, the Nuevo Chaquiro ore body. Nuevo Chaquiro is the copper-gold porphyry deposit.
It has no surface expression and is approximately 400 m below surface. Copper exists as chalcopyrite. The mineral resource within a 0.1% copper envelope is 600 million tons at 0.73% copper and 0.37 g/ton of gold. The project targets the high-grade envelope, containing an ore reserve of 113 million tons at 1.25% copper and 0.7 g/ on gold, containing the 3 billion pounds of copper. Note that the project is based on only one of several mineralized systems and mines only the high-grade Nuevo Chaquiro envelope. The mine is developed as a sub-level cave. Because of the very favorable topography, access will be via 2km, 6 km tunnels from the valley below the plateau.
A shaft system is not required. The mine has 4 m, 5 m diameter ventilation shafts, each approximately 500 m deep. The sub-level caving production rate from the three production levels is planned at 6.2 million tons per annum. The mine will utilize electric equipment and will be highly automated with production drilling and bogging and haulage. Process plant capacity matches the mine at 6.2 million ton per annum. The crushing and grinding circuit is similar in size and flow sheet to Tropicana, using high-pressure grinding rolls.
A copper gold concentrate is produced using flotation, a process applied at several of AngloGold's operations. The concentrate is filtered and transported approximately 200 km to port. Some aspects are new to AngloGold, like hyperbaric filtration and tailings filtration for dry stacking, but these are not new to industry. On-site power demand is about 58 MW and would be drawn from the national hydropower grid. Finally, AngloGold has been working with the local community, regulators, and government to understand and address their aspirations and concerns regarding the development.
The project has been sensitively designed to incorporate environmental and social concerns and the employment and business aspirations of the community. AngloGold Ashanti has developed a concept of mining as a tangible tool for social, environmental, and economic benefit with an innovative plan to create and integrate a park and a biodiversity center into the project. The project implements AngloGold's objective of reducing and, wherever possible, offsetting impacts on biodiversity. The initiative is intended to gradually facilitate the regeneration of more than 2,500 hectares of indigenous tropical dry forests and high mountain forests.
The park will incorporate a series of innovative architectural designs and has the potential to attract tourism to the area, complementing the development opportunities brought by the mine. Our second project in Colombia is Gramalote. Gramalote is a 50/50 joint venture with B2Gold as operator, and is a large open-pit gold project with attributable reserves of 1.7 million ounces. We are in the late stages of completing the feasibility study. The project is already permitted, and minor amendments are being discussed with the regulators.
Construction would take about three years, leading to production in 2024. Gramalote is a mesothermal gold deposit. All reserves of 100 on 100% basis are 125 million tons at 0.86 g/ ton, providing a life of 14 years at a processing rate of 11 million ton per annum. A higher mining rate combined with grade streaming will deliver a production rate of over 400,000 oz per annum for the first five years. This is a similar approach that was adopted at Tropicana. Average life of mine gold production is 284,000 oz per annum.
The capital costs are expected to be between $900 million and $1 billion. All-in sustaining costs are very attractive at $650 an ounce, providing a short payback period of approximately six years from the start of implementation. Mineralization starts from surface. The ore zones vary in width from tens of meters to 150 m, enabling good selectivity with large mining blocks. Mining is by conventional truck and shovel. Four cut backs are currently planned. The mine infrastructure will include the open pit, waste dumps, process plant, and a conventional tailings facility. Power will be drawn from the national grid. The process plant capacity is 11 million tons per annum.
The flowsheet takes advantage of the coarse sulfide mineralization to reduce the processing cost and yield a high recovery of approximately 92%. The process plant will consist of primary crushing, two-stage grinding to the coarse grind size, conventional flotation, concentrate regrinding, and cyanide leaching of the concentrate. Due to the 1:1 gold-silver ratio, a Merrill-Crowe circuit will be used for gold and silver recovery. In summary, this is a very exciting time for AngloGold Ashanti's growth.
Obuasi is on the final lap of project completion. Quebradona is a world-class and brings copper into the portfolio. Gramalote adds low cost ounces to the portfolio. The three projects together add approximately 20 million gold equivalent ounces of production to the portfolio, or approximately 1 million gold equivalent ounces of gold production per annum. AngloGold Ashanti has a good record for project delivery and for successfully working with host governments and communities. Our experienced team's in place, delivering real value through project development. I'll hand back to Christine to conclude and draw everything together.
Thanks, Graham. If I take a step back and consider everything I heard today, four key themes emerge. First, operational excellence. 2020 saw real momentum in our ore reserve growth program. We'll build on this success with continued investment in the development of the portfolio to unlock further reserves. We are poised for growth through our brownfields over the next five years, even before we factor in our exciting potential greenfield opportunities. We understand how critical the next two years will be for AngloGold Ashanti.
Let me be clear, we are thinking about the long-term sustainability of the current operating portfolio and the full investment picture for our business. This is a self-funded investment in the development of our portfolio, will increase longevity and reduce cost over time. In short, will provide growth, production, and margin growth across a diversified world-class portfolio. That is a compelling opportunity. Next, our healthy balance sheet. We are in an enviable position. We have a robust balance sheet that has been significantly deleveraged. This gives us strategic flexibility and ample headroom through the cycle. Our capital allocation framework is clear, with clearly defined guardrails in place.
When I think about this, coupled with our operational excellence, I think about our ability to self-fund growth capital and focus on generating risk-adjusted returns over the long term. Across all of this is our commitment to ESG. A great ESG performance equals great overall business performance. We've seen in countless ways how this mutually reinforcing cycle creates value for a wide range of stakeholders. It makes our community stronger, makes our jobs more fulfilling, and is good for shareholders too. It means reducing our environmental impact, reducing the waste and emissions we produce, and optimizing the use of scarce resources like land and water.
It means maximizing the benefit we provide to our communities and our host governments. The product of this equation is clear. More efficient operations with lower risk profiles, more supportive communities, and increased access to growth opportunities. We aim to be leaders in this area, and as you heard from Stewart earlier today, we're making real measurable progress towards our goals. Goals that we know will always be a moving target, pushing us to do better and strive for more. All the successes you've heard today are the result of a careful strategy endorsed by our Board and executed by every member of management and the entire AngloGold Ashanti team.
It is this vision for the future that makes our valuation so compelling. We have an exciting growth story and the building blocks to unlock value are already in place. We're taking a long-term view, but we've already demonstrated a track record of delivery. Our commitment to our shareholders is unwavering. As we've demonstrated today, we have and will continue to assess all options to improve shareholder value. We'll remain disciplined and steadfast in our approach, and in delivering on the strategy through the cycle within the guardrails of our balance sheet.
We'll maintain this discipline even as we benefit from a suite of visible catalysts in the short, medium, and long term to unlock value. Our investment case is indisputable, and I look forward to AngloGold Ashanti's next chapter as we build on our momentum to unlock the value of our unique portfolio. Our aim remains very clearly to build a solid, predictable business that delivers value for all stakeholders through the cycle. Thank you for your time today.
Thanks, Christine. Irene, we'll take questions from the line, please.
Thank you. We have a question from Raj Ray of BMO Capital Markets.
Thank you, operator, and good afternoon, Christine and team. I have four questions, if I may. The first on the two projects. With respect to Quebradona, what proportion of the project are you looking to execute in-house versus EPCM contractors? With respect to potential for capital appreciation risk, what strategies are you looking at? The reason I'm asking this is because we're starting to see people talk about a commodity super cycle.
We'll see if it's true, but we have seen the impact of this in the last cycle where we have seen industry congestion and significant capital appreciation. If we can talk to that. Second question is on Gramalote. There was news about the open ground application by Zonte Metals, that is now awaiting a court decision. Is that a risk in terms of the timeline for the project? I'll keep it at those two, and then I'll ask the other question on Obuasi later.
Thanks for the questions, Raj. I think in particular, if I can ask Graham to handle the questions on Quebradona, given that he's actually just spoken to it and he's closer to that. Then I will just handle the Gramalote question.
Thanks, Christine. Thanks for the question. Interesting question you pose in terms of the build market and how that might affect Quebradona and in terms of its capital. We've realized that. We realize there is a risk. We're aware of what the construction program looks like in future years. In preparing our cost estimates, we've looked at our contracting strategy, both in EPCM terms and in the implementation contractor terms, using local Colombian contractors.
I believe we're rightly positioned in terms of the cost associated with the project and those applied to the estimate. In terms of your question about balance between EPCM, at this stage, our thinking is to use two. One focused on tailings and water systems and another focused on plant and infrastructure. There are elements that will be handled in-house, particularly the tunnel development, mine development. An approach tailored to the particular work. I hope that answers your question.
I think specifically, does that handle all of your questions relating to Quebradona, Raj?
Yeah, I think it does.
Okay, thank you. I think Gramalote is, specifically the Zonte Metals case, our understanding, and clearly we've had discussions also with B2Gold recently in this regard, this does date quite far back. It's certainly nothing to be concerned about. I think there is a legal process. I think it will extend over quite a lengthy period of time. My understanding is that these claims that are being made does not relate to the project area, so nothing to be concerned about.
You're saying that you are able to start your construction activity despite the legal case that's going on?
There is no concern from that perspective. I think what you've got to bear in mind is that we already do have the mining license for Gramalote. There is a notification, not relating to the Zonte matter, but there is some changes to the mine plan, relating to Gramalote in terms of the feasibility study. There's a notification that has to be made to the authorities. It does not impact the mining license. It just means it's a notification that has to be made. This particular matter does not impact the project at all.
Okay. Thank you. Graham, sorry, if I may go back to you once more on the Quebradona. The CapEx that you have, $1.3 billion-$1.4 billion, what's the underlying assumptions for commodity prices? If you include today's spot prices, what does that do to the CapEx, or what's the sensitivity?
If I understand your question, I don't understand the connection between the copper price and what the CapEx might be.
No, the copper price-
The assumption-
The steel and the other raw materials, yeah.
Oh, as in supply into the project?
Yes.
Yes, it would have an influence on copper, sorry, on things like cabling and so on. Certainly, the copper price has certainly rocketed up. We haven't finished the feasibility study yet. The range that I've provided is still one under review. One of the areas to be looked at is the contingency, and at this stage, we've just applied a factor. As we finalize the capital estimate, we will look at those sorts of factors and see what the prevailing market is and see what level of contingency should be applied to deal with those sorts of issues. I think that that will be our approach to getting to the final estimate.
Okay, thank you. And then Graham, I think the Obuasi, I have a question on Obuasi that might relate to you as well. With respect to the underground development, can you give us some idea as to how much underground development remains to be done to arrive at a steady state, and where you are as of today?
Maybe a way to express it would be how much have we got developed for production. At this point, we've got about 9- 10 months of developed production in terms of capitalized development, and we'd like to get that out to about 18 months to two years. In those terms, we've probably got about another 10 km or so of the capital development to do, which would get us into a position that we would then sustain through the ongoing business.
Okay. What's your advance rate right now in terms of per day?
We're doing around 14,000 m per annum. If you can do the math quickly on that would give you the number. Sorry, I'm just on my phone, so I don't want to use a calculator.
Okay. In terms of where you want to get to, is that or how far are you away from what your annual development rate should be?
Right now, because of the impact on COVID that I've sort of outlined and the issues we've had with skilled labor, we're working at around 70%, 75% of development capacity. That's not because of equipment. That's really due to the COVID impacts we're seeing right now. We want to bring that up in capacity and then sustain that and get further ahead in terms of development. Right now, the capital development is fine in terms of the ramp up.
We'd like to be a little more advanced, but we're dealing with the sort of priorities and restrictions around the COVID impacts at the moment. From a drilling point of view, production drilling in terms of drilled stocks and available stocks, that's all fine. It's the capital development and production that we're really seeing ourselves constrained somewhat just now.
Irene?
Thank you. Our next question is from Grant Sporre of Bloomberg Intelligence.
Hi, good afternoon, everybody. Just two follow-up questions from my perspective. The first one is probably for Tim. In your presentation, you mentioned you were targeting 3.5 million ounces of additional ore reserve additions in 2021. First question, is that with depletion or accounting for depletion, or is that on a gross basis? If it is on a gross basis, so that'll mean roughly an additional 500,000 oz of reserves in 2021. Would that be an acceptable sort of run rate going forward, sort of incrementally adding 500,000 oz per annum? That's my first question.
Then second question, perhaps one for you, Christine. Just in terms of, and it has been alluded to, and you alluded to it in your closing remarks, the sort of the value or the discount versus peers. Do you consider sort of as a management team why AngloGold does trade at a discount to some of your larger peers? Perhaps an unfair question, but do you think the plan that you've laid out today, which is very, very extensive, would close that valuation gap over time? Thanks very much.
Thanks for that. I think, Tim, if you can address the first question.
Okay. No, thank you for that. We note in the presentation that we're looking to add 3.5 million ounces or more. That's sort of our baseline target, but there are opportunities out there to add more. Our number one goal is to always make sure that we replace depletion, and the 3.5 million ounces that we note there will be gross. There, we're always working to build a margin above depletion. Continue to do that so that we continue to increase reserve life.
Okay. Thanks, Tim. I think certainly, as a management team, we constantly are looking at ways of unlocking value in the portfolio. I think certainly the plan that we've outlined today, firstly focusing on brownfields exploration, and extending the reserve life, I think is one of the very key areas that is going to help us unlock value across our portfolio. Of course, we've got the growth projects are also very exciting, and they're very key. Firstly, Obuasi, completing that, and we're well on our way, actually in the final lap of Obuasi, as we said.
Of course, then it is also getting the two Colombian projects to investment decision. That is certainly going to improve the quality of our portfolio and extend reserve life. I think certainly also addressing the free cash flow conversion challenges that we do have, we spoke about that yesterday, is one of the other ways that we can unlock value. It's quite significant uplift in our share price if we can get the cash out of the D.R.C, and it is looking very imminent.
We've spoken about this a few times, but certainly it is looking like we just about there. March is the date we will get the first chunk of cash. Clearly also addressing the VAT receivable in Tanzania. I think, look, as a management team, we will have to constantly, I don't think this is just once-off that we do this Capital Markets Day presentation. I think we're certainly going to have to constantly be looking at ways of how we can improve, how can we unlock value. We call ourselves active portfolio managers for that reason. It's not about being complacent. It's about constantly tracking against our plans, but also looking at ways of further unlocking value for our shareholders.
Thanks, Irene.
Thank you. Thanks very much.
Thank you. Our next question is from John Tumazos of John Tumazos Very Independent Research.
No family of three families that are 13 different devices. I don't know that those are right. That's just one family of products. The modern ones have the built-in backup.
Irene?
Seems there's no response from that line.
Next question, please.
We'll take the next question from Shilan Modi of UBS.
Afternoon, everyone. Thanks for taking some further questions from me. I've got three. The first one is just more clarification. Like, when you go through all of the mines in your portfolio, you kind of give a little bubble with the life of mine. Is that an aspirational number? Given that currently your reserves actually don't support that life of mine number. The second question is, if I look at your portfolio and I think about it for the next couple of years, am I correct in thinking that implicitly for the next, say, two years, we're looking at, on average, a lower grade scenario for the company, before things start improving?
From late 2022, early 2023, when things start improving. Implicitly, does that mean we're gonna go through like a high-cost period? The third question is, in terms of the projects, they seem to have quite positive outlooks. I'm talking about Quebradona and Gramalote. If I look back 10 years ago, you all said two projects ongoing at the same time. At the time, it was Tropicana and Kibali. How is the company positioned differently this time around? Thanks.
Thanks for that, Shilan. I'm going to ask Vaughan to address your first two questions, actually.
Okay. First, on the life of mine plan and the bubble in the report. Effectively, that bubble is calculated as the ore reserve. The current ore reserve divided by the sustainable production from the previous year. It's just an estimate. It's certainly not a life of mine plan. That's all it is. It's just an indicative estimate of what the life could be. It's coherent across the entire presentation. All of them are calculated in the same way.
Can you answer the question in terms of grade?
Grades over the next-
Yeah, the average grades over the next two years, I would not expect to see a significant difference. Christine did obviously explain earlier today that our reserve grades have gone up quite dramatically with the sale of South Africa, specifically Mine Waste Solutions with the big tonnages. Those grades have stepped up. We would expect to see the operations maintaining their head grades. There's no expected major dramatic changes on any one of the operations in terms of average grade mined.
Just a follow-up to that. If you're talking about no change to the grade profile for any of the mines, even with Geita in your outlook, you say there's a dip in production for the next two years. If the grade stays constant, that implies the plant will actually be operating at a lower rate. Maybe explain the gap there.
Okay. I guess for Geita, it might be a bit of an exception in that, as we have explained, it is very much a different year coming up with us moving to more underground, losing and completing the Nyankanga pit late last year, and then moving through into Nyamulilima. There is a difference. Nyamulilima is slightly lower grade than Nyankanga was, there will be a slight reduction on that perspective. I guess Geita is an exception to the rest of the company.
Thanks for that, Vaughan. I think specifically as relates to the two projects, Graham actually spoke about how these projects are going to improve our portfolio quality and help us lower cost and extend life. I think what's important to note is that in the first four years, you actually already see, in terms of the guidance numbers that we've given out, that you already see growth coming through from our existing portfolio. Clearly, the Colombian projects do come in at the back of that five-year period. It's really then thereafter you will see steady state. I think certainly you will see that improvement in our portfolio.
You heard the operators speaking today about the optionality within both the Africa portfolio and the international portfolio in terms of very long life assets. Our track record in terms of exploration success speaks for itself. Clearly with that will also come an improved portfolio and lower cost. I think certainly in the longer term, we've given you a five-year view on production.
I think our focus very much with this increased exploration program that we have is to improve reserve confidence over the longer term, and we'll be able to guide hopefully to 10 years. I'm not going to give you when, but I think the focus of it is to give us a longer visibility on our assets. Clearly, it is to lower cost, to improve the quality of our portfolio, and to extend reserve life.
My question actually referred to 10 years ago when AngloGold was building Tropicana and Kibali, I think Venkat was the CFO at the time, and Mark Cutifani was the CEO. Effectively, I think the company came from effectively an unlevered position. I think you just had paid off all of the loss-making hedges that had constrained the company for a long time.
There was a positive outlook on most of the operations, and then there were these two projects that were going to be developed. Now, where the question relates to today is effectively, I am indirectly asking you, are you doing procyclical investment? Is the risk that, in three years' time, if the gold price is lower than it is today, then you will be caught with a levered balance sheet like you were last time. Therefore, how is the company different today?
Look, that's a very good question, but I think it once again talks to how are we seeing through the cycle in terms of when we make assumptions on projects. I think the fact that we have stuck to a very conservative reserve planning price, project planning prices as well. It's $1,240 long-term real that we assume for gold projects. I think certainly when it comes to copper, you can assume similar prudent assumptions going forward. I think the other aspect of it is in improving the quality of our portfolio, you are going to see a lower cost profile coming through, and we'll be able to capture margins over the longer term.
We're certainly, in the long term, not planning to lever up the balance sheet of the company. Of course, one has to allow for some flexibility. That's why we give a one-time target through the cycle. I think the way we think about planning for the company over the long term is actually to position us better to capture margins and deliver improved returns to shareholders.
Okay, thanks very much.
Thanks.
Thanks, Shilan. Irene, I'm going to take some questions from the webcast. We're kind of running a little short on time, and I've got a line of them, so let's see how many we can get through here. Chris DiSalvatore at RWC Partners says that, "Project CapEx on Quebradona looks very low relative to other similar projects of size in the region. Why is initial project capital intensity so low?" Graham, can I hand that one to you?
Thanks, Stewart. I'll have a go at answering the question. These sorts of things come down to the characteristics of the project itself. Quebradona, firstly, is high grade. One of the slides shows a comparison of the Quebradona grade versus several others. At 1.25% copper and 0.7 g/ ton, you're looking at somewhere like a 1.7% copper equivalent. A good grade, which means that volumes are lower per pound of copper production. I think the nature of the ore body, it sits within an escarpment, it therefore doesn't require shafts and will have twin tunnel access.
Also, the mining method in sub-level caving, we'll mine that entire envelope. Compared with large open pits, where you've got big movements because of strip ratios and therefore large quantities of equipment, your costs are therefore lower. We're using grid power, we don't have anything other than power line requirements. Location. It's favorably located close to Medellín, and very close to a highway, very close to water access. I think those sorts of attributes of the project together with the grade explain the lower capital intensity that you're observing.
Great. Thanks, Graham. Vaughan, the next one for you from Jared Hoover at RMB Morgan Stanley. He says, "What exactly does the $45 an ounce to add reserves relate to? Is this all the exploration and drilling related to convert resources and reserves? Does it include the written off exploration that doesn't deliver any reserves?
Okay, thanks, Jared. To start off, yes, it does. It includes the entire budget expensed in converting from inferred mineral resource into indicated and measured mineral resources prior obviously to our life of mine planning. That would then deliver the ore reserve. It's fully inclusive of all the costs that we incur in the process, and obviously, it does include any write-offs of resource and reserve. In reality, our conversion rates are pretty high, probably 80%-85% conversion from inferred to indicated. As a result, we don't have too much falling away in that process.
All right. The next question is from Nkateko Mathonsi at Investec. Nkateko says, "What is the level of production reductions at Geita in 2021- 2022?
Thanks, Nkateko, for the question. As mentioned, Geita is transitioning from Nyankanga, which has been the mainstay, the main open pit. It is transitioning into the closure of that pit into the opening of a new pit, which is Nyamulilima. As Vaughan said, that that pit comes in at about a gram per ton lower than at the moment, than Nyankanga. I think that's the first thing. Coupled with the fact that we will be accessing that pit, Nyamulilima, probably in the second half of this year. Therefore, there is a delayed effect in terms of bringing those ounces into 2021.
The second aspect, of course, is the opening up of Geita Hill, and that is expected to start delivering ore as well in the latter part of 2021. In terms of our conservative planning assumptions is that, the main sources of feed for particularly this year is going to be the stockpiles, which is basically the ore from the last remaining benches of Nyankanga, which we mined last year. The two underground sources, which is Nyankanga Underground and Star and Comet.
We have adopted conservative planning assumptions to make sure that we are able to go through this transitional period with a fail-proof plan. There is upside. If we're able to go into Nyamulilima a little bit earlier, we do believe there will be some outcropping ores there, which will then actually strengthen our production profile for this year. As we go into Geita Hill as well, we may encounter some development or we may access those a little bit earlier, depending on our success in terms of the drilling.
We have gone in a little bit on the conservative side, but we believe it's prudent to do so. However, we do see a bit of upside, in 2021 and possibly as also we get to understand the ore bodies a little bit more, with exploration success this year, it will feed into next year. It will actually make the production decreases we are seeing now much less than in our plans. Thanks.
Thanks, Sicelo. We have another one from Jared where I'll boil it down, but in effect, what are our long-term planning assumptions, reserve price assumptions, resource, revenue planning? Maybe we'll start there, Christine, if that's okay.
Yeah. Thanks for that question, Jared. The reserve price assumptions long-term is $1,200 an ounce. We recently increased it from $1,100- $1,200 an ounce, and the resource price planning assumption is $1,500 an ounce. It was increased from $1,400-$1,500 an ounce. Still very prudent. When we compare that to our peer group, we're certainly at the conservative end of the scale there.
Great. I think, Christine, Jared also asks about what drives our view of jurisdictional risk as we are looking at these capital investments in new areas.
Yeah, that's a good question, Jared. I think quite importantly is when we do look at jurisdictional risk, we do also look at it through the eyes of how the market looks at it, in particular, institutions. That would involve rating agency views as well as how funders potentially look at it. We take the country risk premium into account, the risk-free rate of return. I think what we also take into account when it comes to project is any project-specific risks. There are a variety of factors that would actually impact the cost of equity and how you would adjust your cost of equity to particular jurisdictions.
In this instance, we particularly do look at the external impacts, and then internally, in particular, it is looking at project risks in itself. Typically, for example, Australia would be a very low-risk jurisdiction. Colombia is a bit higher. We still also see it as a low-risk jurisdiction. There are some other jurisdictions for example, in the D.R.C, and we've seen it with the issues that have arisen recently. Yes, we've been successful as a company in managing jurisdictional risk.
There, for example, it would have a higher risk than, for example, Colombia. Hopefully, that sort of gives you a sense of how risk is adjusted across jurisdictions, and it does impact the discount rate at which project returns are calculated. Typically, when we do look at the overall project, it's not just price that factors into it's a number of these other risk factors, capital, operating costs, as well as the price. Hence, for these projects in particular, we would be putting out ranges. We'd be put out the feasibility study so that you can actually understand the parameters. Of course, we will be stress testing all of that through a Monte Carlo analysis as well.
Thanks, Christine. Just one quick question from Marcelo Kim at Paulson. Was the copper gold split at Quebradona? Marcelo, that's 80/20, 80 copper, 20 gold over the life of the project on average. I'm going to just hand over to Claudia to take the last two questions from Arnold and Leroy before we wrap, please.
Thank you. The next question comes from Arnold van Graan from Nedbank. Please go ahead, Arnold.
Yes, thank you. Christine, quick question on Quebradona. Would you consider bringing in a partner to spread the funding risk and I guess also the country risk? It goes to some of the earlier questions. Perhaps maybe B2Gold given that you already have a partnership in country. Lastly, you talk about essentially being portfolio managers. I guess a bit of a left field question, but would you ever consider a offer for Kibali or do you consider it to be part of the crown jewels? I'm asking that in the backdrop against the difficulties getting the cash out of the country and all the other challenges. Yeah, that's it from me. Thank you very much.
Thanks for that question, Arnold. I think in Quebradona, we're not looking for an equity partner. In particular, what I did speak to is financial risk mitigation. I think we're quite comfortable with all the other aspects of risk, including country risk. As a matter of fact, Colombia is ranked by the World Bank as one of the highest risk-rated, risk-adjusted return countries for investments that they've actually been involved in.
I've spoken to all of the other risk mitigations, and I think improving confidence that we've actually seen in the country as well, and quite importantly is both of these projects are ranked as strategic projects in Colombia, and we've seen very good support at different levels of government within the country. I think it is more about financial risk mitigation. We're quite comfortable that we've got sufficient headroom in our balance sheet to fund this project at 100%, Quebradona at 100%, and then Gramalote, our 50% share of it as well.
Clearly, the refinancing of the $700 million bond, as well as the undrawn facilities, the RCF facilities, $1.4 billion on our balance sheet. We're sitting with $1.3 billion of cash at the end of December. That's quite a lot of firepower to execute on our growth strategy. As regards Kibali, I think certainly this is a crown jewel for us. We're very focused on working with Barrick to get the cash out of the country. Of course, both Barrick and ourselves are affected in the same way. It's not for sale. Of course, if we offered a premium price for our share of the asset, we'll certainly consider it, but I do need to state that it's very much a core asset within our portfolio.
Thanks, Christine. Claudia, last question from Leroy, please.
Thank you. The final question comes from Leroy Mnguni from HSBC. Please go ahead, sir.
Thanks, guys. I'm glad I could sneak in. I have two questions. The first one is probably for Stewart. It relates to the G in ESG. If I look at your board composition, I look at sort of strategically where the company is going, there's a disproportionately high number of South Africans on the board. Is that a concern at all? Is that something that you would be looking to change to get some more of the ground expertise in some of the areas that you're more concentrated in terms of production?
My second question is, when you look at allocating funds towards exploration, what are the main characteristics you look at, in terms of prioritizing certain assets over others? Is there a jurisdictional risk issue? Do you focus on the ones that have critically short life of mine or is it maybe a profitability thing? Do you prioritize assets that are more profitable? Just some color on how you look at that. Maybe a third one. When I look at your assets that are going to underpin your organic growth, they all seem to be the assets in the regions where you haven't recently struggled to get cash or VAT refunds out of. Is that purely coincidental or is that intentional?
Leroy, I'll quickly tackle the first question. I think the number of South Africans on our board is, no, is not a concern to us. I think we're certainly comfortable with that. I think the skills mix on the board is appropriate. The board is always looking at its composition to ensure that it's appropriately staffed and skilled for whatever lies ahead of us. They're never standing still in that regard, and they certainly are keeping a focus on whatever particular challenges are coming at us at any point. I would say that it's certainly front of mind for them, but the number of South Africans on the board, no, is not a concern. I'm gonna hand over to Vaughan for the next question.
Okay, thanks. In terms of prioritizing exploration. In reality, it starts off with our understanding of the geology. We're focused absolutely on not wasting money on exploration. We would only target the areas where we have a geological understanding that suggests to us that that ore body could extend at depth or along plunge or along strike. That would be the starting point. Naturally, there has to be a portfolio look at it, but it all starts with the geology. We superimpose a portfolio look, and it's really around those operations that we would like to extend the life. In general, it always comes back at the end of the day to the geology.
I think certainly when it comes to capital allocation, because that's in essence the question that you're asking about, on capital allocation. I think quite importantly, is that we do have a diverse portfolio, which already brings balance to capital allocation. Of course, in terms of how we allocate capital, it's very much driven based on opportunity, but also based on level of confidence that we see in that opportunity. Typically, in our business plans, and certainly for the five years going forward, you've in essence been given a snapshot of our five year business plans.
You will see all the high-confidence opportunities that have actually been factored in here. I do need to say to you, it's certainly balanced across our jurisdictions, and I think Geita is a point in case we have battled to get our VAT recovered. We have decided that we really want to be focusing on extending the reserve life there, both underground and open pit reserve life. The fact that we are balancing it across our jurisdictions, I think certainly is a form of risk mitigation as well.
Thanks, Christine. Just before I ask you to make a few concluding remarks, and we'll wrap up. Just to assure everybody who has sent questions through on the webcast that we'll get to those and respond to you over the next day. Apologies for not getting to you live on the call and ditto for those who were in the queue on the call. Christine?
Thanks, Stewart. In closing up, I'd like to say that AngloGold Ashanti is really at an exciting inflection point in its growth path, primed to generate returns from its strategy. We are proving that there are high-return investment options open to us, and after several years of rationalizing our portfolio, we now have a clear and credible path to disciplined, high-return, and low-risk growth.
Our investment case is indisputable. I'm certainly looking forward to AGA's next chapter as we build on our momentum to unlock the value of our unique portfolio. Our aim remains very clearly to build a solid, predictable business that delivers value for all stakeholders through the cycle. Thank you very much for joining us today. Take care.