Rob Atkinson
Executive Vice President and Chief Operating Officer at Newmont
Thank you, Tom, and good morning, everyone. I'll begin my discussion around the high-margin Tier one assets in our portfolio today, starting with Boddington. During the third quarter, I had the opportunity to visit Boddington and spend time with the team as they continue to ramp up the planned waste movement in the North and the South pits and prepare for the planned mill maintenance shutdown in the fourth quarter. Laybacks are progressing well, and Boddington delivered solid production in the third quarter as expected. The strong quarterly performance has helped to offset the impact from mill maintenance and unusually wet weather. Despite the heavy rainfall in the third quarter, effective utilization for the autonomous whole fleet has improved significantly compared to this time last year.
Funds mined are expected to increase in the fourth quarter. And I'm pleased to say that we have successfully completed the commissioning of a further five new Cat autonomous haul trucks to accelerate stripping in 2024 and position this cornerstone gold copper mine to reach higher grades in 2025. Turning to Tanami. Our Tier one mine in the Northern Territory continues to deliver consistently strong results. following the record wet weather and extended flooding experienced in the region during the first quarter of the year. We achieved record mill throughput in August, beating the previous record we set in March of this year.
And we continue to expect to reach the year's highest rates and production levels in the fourth quarter. However, we are closely monitoring the impact and the status of the very large wildfires currently burning in the immediate vicinity of Tanami and in the Northern Territory, and we will continue, as always, to prioritize the health and the safety of our workforce. We also continue to progress our second expansion project at Tanami, and I was encouraged to see the headway the team is making during my recent visit. We've achieved a significant milestone in the concrete lining of our 1.5 kilometer deep shaft, fully aligning the upper sections and removing the mid-shaft And as is typical with projects of this size, we will review the project plan as we commence the lining of the lower sections, taking into account the work that has been done so far, the current ground conditions and the overbreak needing to be mitigated in the lower section of the shaft.
Once complete, this project will deliver significant ounce and cost improvements, further strengthening the already strong margins at our Tier one operation at Tanami, and we look forward to providing an update with our guidance in February of next year. Turning to Ahafo. As Tom mentioned, third quarter mill throughput was impacted by routine condition monitoring by our asset management team, identified hairline fractures to one of the large grinding mills at Ahafo. To reduce any further deterioration to the and to prevent a catastrophic failure, we made the decision to operate at less than full capacity, bringing throughput to around 60% for the third quarter.
We have in October swapped the gut tiers between our two milling circuits at Ahafo to ensure our most productive milling circuit is able to run at 100%. This will allow Ahafo to run at approximately 80% of until we again reached full processing rates in the second quarter of 2024 when we will install a brand-new Also, during the quarter, Ahafo accessed higher-grade ore from Subika Underground and successfully commissioned the replacement conveyor ahead of schedule and below budget. The Ahafo North project continues to progress as planned, and we have access to all critical parcels of land to commence construction of the processing plant and mine services facilities.
Airports are ongoing, heavy mining equipment is being assembled and commissioned, contractors are fully mobilized, and we remain on track to commence pre-stripping of the first mining area called the pit in the fourth quarter of this year. Turning to Penasquito. As Tom mentioned in his opening remarks, we reached a definitive agreement with the union and received approval from the Mexican Labor Court on October 13. We have safely restarted operations, and the ramp-up is progressing well so far. We are anticipating a return to full productivity in the next two to three weeks, and we have restarted waste stripping in the Penasquito pit and are now feeding the crusher with ore from the Chile Colorado pit.
We are importantly also continuing to strongly focus on the engagement with our workforce. This unnecessary strike caused significant hardship for all of our employees, contractors communities, suppliers and customers. Penasquito is the largest employer in Zacatecas with a direct workforce of more than 5,000 and another 28,000 people in neighboring communities who are part of the mines local and national supply chain, service providers and contractors. As we look ahead to the exciting and profitable future for Penasquito, we will continue to honor our commitments, work closely with all of our stakeholders with the law and the collective bargaining agreement and work to protect the long-term value of this Tier one polymetallic mine.
Moving to our non-managed joint ventures. Through our joint venture partnerships, Newmont has an interest in four Tier one assets Cortez and Turquoise Ridge. The joint ventures are core to Newmont's portfolio and contributed 352,000 ounces or 27% of attributable gold production in the third quarter. As Tom mentioned, reported performance from our non-managed operations has been below expectations for the year, impacting our ability to achieve our production and cost targets for 2023. We have adjusted our projections for both Pueblo Video and Nevada Gold Mines and look forward to an improved performance in the fourth quarter from our joint venture partners.
On top of the 800,000 ounces of gold produced from our Tier one operations and joint ventures, the remainder of Newmont portfolio contributed approximately 500,000 ounces of profitable gold production, an increase of more than 100,000 ounces compared to the second quarter, and we anticipate solid results from these efforts through the rest of the year. Before I hand it to Karyn, I'd like to take a moment to cover a few highlights from our development projects we are currently executing. On top of the achievements that I already noted at our second expansion at Tanami and Ahafo North, we also achieved key milestones at Cerro Negro, Porcupine and At Cerro Negro, we declared commercial production for San Marcos across the six ore bodies associated with this exciting district expansion.
This opens up a further 650,000 ounces of high-grade gold, which will be mined over the coming 10 years. This milestone was delivered on time and on budget, and we expect to start realizing the benefit from these high-grade stopes in the fourth quarter of this year. At Porcupine, the Pamour project has been approved for full funds by the Board. This opens up a further 2.1 million ounces of gold and will be mined over the coming 11 years, which helps extend the Porcupine complex operational life to at least 2035. Our mining team will commence pre-stripping in the fourth quarter and are tracking well to produce in 2024.
And finally, we advanced our underground project to Akyem to the feasibility stage, where drilling from the surface has already delivered results that are beyond our initial expectations. And with that, I'll pass it over to Karyn to cover our financial results.