Rob Atkinson
Executive Vice President and Chief Operating Officer at Newmont
Thank you, Tom, and good morning everyone. Turning to the next slide, let's dive into the operations and projects starting with Africa. Tom and I had the opportunity to separately visit Ghana recently, and we were impressed with the progress at both operations as we continue to advance important growth opportunities in this proven mine industry, including sublevel shrinkage at Subika Underground, the Akyem layback and of course Ahafo North.
As indicated during our fourth quarter earnings call, Ahafo South has had a challenging start to the year. The sites first quarter performance was impacted by supply chain disruptions and global border closures, impacting labor availability and the delivery of new equipment and critical spares. As an example, last year the site ordered four new drills for the underground pit operations and we only received the first drill in March this year with delivery of the remaining drills expected sometime in the third quarter, much later than originally planned.
In addition, the delay in of replacement parts for existing drills, as compounding the situation creating availability challenges with the equipment that we have on hand to date. Improved drill performance has helped to offset these delays, but the impacts from the pandemic have affected our ability to ramp up mining rates in the Subika Inderground, and as a consequence, we are evaluating ways to improve our mining rates which may include adding a third production level to access higher rates in late '22 and into '23 and we expect to have an update with our quarter two earnings in July.
Akyem delivered a solid performance in the first quarter due to sustained throughput and strong recoveries. Akyem continues to progress stripping of the next layback and new pit, which will extend mine life by an additional four years and provide future optionality for both underground and open-pit growth. And finally, we continue the development of the Ahafo North project. Engineering is nearing 90% complete and procurement is 60% complete as we continue to work together with local communities, traditional leaders, and regulators to get full land access and commence construction.
And just in the last few weeks, Tom and I met separately with key stakeholders and received strong support for this important project. And last week, we also achieved an important milestone with the cabinet in Ghana formally approving the diversion of the highway that currently passes through a section of the new mine site. When operations begin, Ahafo North is expected to add approximately 300,000 ounces of gold per year while creating lasting value for host communities through enhanced local sourcing and hiring as we develop its prolific ore body.
And now coming to Australia. At Boddington and Tanami, we experienced the impact from the Omicron surge in the first quarter as labor availability and close contact isolation protocols impacted the region. In addition, the West Australian border was reopened in early March, leading to an increase in on-site cases, but also allowing our teams, contractors, and business partners to move more freely through the country and to Tanami for the first time in many months.
At Boddington, we reported lower production compared to the fourth quarter due to planned maintenance and COVID-related absenteeism as we saw our first COVID cases on the site. These impacts were partially offset by improved grades and higher ore tons mines from Boddington's fleet at fully autonomous trucks. The team is diligently working multiple phase positions in the circle to access higher grade ore and we expect some mine in grade to remain strong for the year as we continue to optimize consistency, efficiency, and productivity on our autonomous truck fleet, a key component to delivering a strong finish to the year.
At Tanami, the site delivered a strong performance despite the impacts from the Omicron surge in the first quarter and a very competitive labor market in Australia. The site also delivered more ore grade than in the fourth quarter due to mine sequencing and unplanned maintenance at our processing facilities. The team continues to progress to the second expansion at Tanami, a project with the potential to extend mine life beyond 2040. As you can see here in the photo, the assembly with the headframe is nearing completion, which is an important milestone as we transition from the rewind of the shaft to commencing the shaft winding activities. Nearly 85% of the project engineering and procurement has been completed and over the coming months, the site will focus on the completion of the headframe installation and commencement of the shaft lining bringing Tanami not much closer to delivering significant ounce, cost and efficiency improvements.
And now over to North America. Penasquito delivered another solid quarter, a strong mill performance that delivered higher core product production from lead and zinc to offset lower gold production. Stripping has continued at both Penasco and Chile Colorado pits, with lower gold grade and harder ore coming from Chile Colorado in the first quarter. And looking ahead due to efficiency, gold production from this large polymetallic mine is expected to decrease in the second quarter, but increase in the third quarter due to higher grades delivered from the Penasco mine.
Moving to Canada. Our operations in the country as a whole continues to be impacted by ongoing challenges stemming from the global pandemic and a very competitive labor market. As indicated, a couple of months ago, the Omicron surge reintroduced flight capacity constraints, testing requirements, and strict close contact isolation protocols. And working closely with the first nations, we have maintained our stringent protocols and testing regimes, even as restrictions have relaxed. Due to the remote locations, these impacts were particularly pronounced in Musselwhite and Eleonore where both sites delivered lower tonnes mined and process compared to the fourth quarter. As an example, we saw absenteeism rates as high as 15% to 20% during the peak of the Omicron surge in our Canadian operations. And at Musselwhite, we decided to play safe and care maintainance for seven days in February to reduce the spread of the virus and protect the health of our workforce and communities.
At Porcupine, our ore grades were offset by lower tons processed as a result of COVID-related labor absenteeism and now maintenance in addition to challenging rent conditions and some ventilation constraints at Hoyle Pond. The site continues to progress Pamour layback project that will extend mining occupancy through 2035. Construction of the water treatment plant is well underway to dewater the pit and advance toward full funds approval in the second half of this year.
And finally, at CC&V the mine required a mill shutdown from a conveyer fire that occurred during the first quarter. With the pending conclusion of our contracts like concentrates from CC&V to the valley gold mines, we are stepping back to assess our operating strategy at the site to determine if there is the potential for a simpler, higher value over the life reach only operation that does not carry the complexity and cost of running a mill to process a relatively small amount of ore mine. This work is underway and we expect to have an update with our quarter two earnings in July.
Coming to Central America. Merian delivered a solid performance despite very heavy rain and no maintenance during the first quarter as the site continues to utilize an ore binding strategy to balance heavy grade and strong mill performance. At Yanacocha, record rainfall resulted in a federal emergency declaration of Peru impacting the site as it continues to deliver leach only production, while we've worked to develop the first phase of the Sulfides project, which continues to advance towards an investment decision in late 2022. Engineering is approximately 50% complete and the early earthworks and construction activities continue to progress at site. And once finished the camp will allow the construction workforce to begin ramping up in 2023.
And finally, Cerro Negro delivered a strong performance in the first quarter as a result of higher grade mine from Marianas North and Marianas Central and ongoing improvements for productivity, despite disruptions from the Omicron surge. During the first quarter, the team successfully completed the tailings storage facility expansion project, and they continued to progress the first wave of expansions at Cerro Negro, including the development of the Marianas and Eastern districts to extend existing operations beyond 2030. The team is advancing the development of the San Marcos decline. And as you can see in the quarter, the construction of the roads, infrastructure platforms and portal access are all well underway in the Eastern district. And with that, I'll turn it over to Nancy on the next slide.