IAMGOLD Corporation provided second quarter update on activities at its Côté Gold Project. All dollar amounts are in US dollars at a USDCAD exchange rate of 1.30, unless otherwise indicated. The second quarter saw an increased number of COVID-19 cases in the Timmins area. Although some cases were experienced by a small number of workers during this wave, heightened testing and additional constraints on site circulation were implemented which limited the number of cases. To date, the Company has not experienced a material impact on the construction schedule due to COVID-19. Earthworks activities continue to progress with roadwork, water pumping, fish relocation, the completion of the tailing management coffer dam and continuation of drill and blast activities in the open pit. Plant site blasting has been completed and final level adjustments are ongoing. The concrete batch plant has been commissioned and is in production and concrete pouring and form work has started with a focus on the ball mill and vertical mill foundation work. The freshwater line and overhead 13.8kV power line have been completed, are being commissioned and are expected to provide 4MW line power availability to site in the third quarter of 2021. The Hydro One electrical upgrade work continues with the completion of tie-in modifications at the by-pass at Timmins Porcupine Main Substation and tower reinforcements and stringing in progress. Construction of the permanent camp is progressing with approximately 60% of the planned permanent capacity commissioned at the end of July. The Project was accommodating over 700 workers at site at the end of July between temporary and permanent camp accommodations. The administrative building has been completed and the wastewater treatment plant is being commissioned. Permitting and stakeholder engagement continues. On June 28, 2021, the Company, the Métis Nation of Ontario and SMM celebrated the signing of an impact and benefit agreement relating to Côté Gold. In addition to the existing IBA with Mattagami First Nation and Flying Post First Nation, the Company has completed all of the IBAs it expects to complete relating to the Project. Operational readiness commenced with the start of the operation's new General Manager and a focus on organizational design review, maintenance and health and safety systems. The Company's remaining 70% share of Project costs from July 1, 2021 forward, based on these assumptions, is estimated at $930 million to $980 million. On an annual basis, the Company's share of estimated remaining total costs to completion is expected to be expended as follows: second half of 2021 ­ approximately $301.3 million; 2022 ­ approximately $510 to $540 million; and 2023 ­ approximately $120 to $140 million. The above-noted amounts are estimated at a USDCAD exchange rate of $1.30 and take into consideration working capital adjustments, therefore, actual amounts are expected to vary. At June 30, 2021, the Company had total available liquidity of $1.3 billion. As previously disclosed, based on information currently available and work completed to date, which is ongoing, the change in the project costs estimate was primarily driven by increased structural, mechanical, piping, electrical and concrete estimates for the processing plant facility and increases in earthworks and concrete estimates due to estimates updates and certain scope changes representing, collectively, almost 50% of the increase. Additional increases were estimated in mine facilities costs and the inclusion of a portion of the camp cost previously included in operating costs as a lease; resulting increases in indirect costs, EPCM and owner costs; direct costs related to COVID-19; and changes in the currency exchange rate; partially offset by the transfer of certain costs to the operating period. The revised project costs range includes new contingency amounts for the remaining expenditures estimate. These revisions result from increases in estimates including quantities and manpower, changes in scope, the negative impact of COVID- 19 on labour productivity and inflation. The Project metrics remain similar as previously announced in the Company's July 21, 2020 news release with some estimated increases in cash costs and all-in-sustaining costs per ounce of gold sold primarily resulting from the impact of recent inflation on operating consumables. Work will continue to focus on earthworks, haul road construction and water management infrastructure around the pit site. Pre-stripping work in the pit is expected to continue and the permanent camp is expected to be fully commissioned in the third quarter 2021. Civil works, currently underway at the plant site, are expected to continue with the placement of pre-cast and cast-in-place concrete, as well as the preparation for erection of the plant building shell. The Company continues to work on opportunities to further optimize the schedule. The schedule does not account for any potential delays or disruptions caused directly or indirectly by the COVID-19 pandemic, including potential impacts on timing of activities, productivity or workforce numbers, supply chain and logistics. The Company has all key permits in place for construction activities planned for 2021. Additional permits are required to complete certain subsequent construction elements planned for 2022 as well as commissioning of operations planned for 2023, all of which the Company expects to receive in due course. District Potential: The Project has estimated mineral reserves totalling 7.3 million ounces of contained gold (on a 100% basis) in proven and probable reserve categories (calculated at $1,200 per ounce gold) and estimated mineral resources (calculated at $1,500 per ounce gold) totaling 10.2 million ounces in measured and indicated resource categories (including mineral reserves), with a further estimated 3.8 million ounces in inferred mineral resources. In addition to planned delineation drilling programs to support the future mining activities of the Côté Gold deposit itself, the Company is also carrying out an ongoing greenfield exploration program on the Côté Gold property. This greenfield exploration is included in the corporate exploration budget. In 2021, the Company expects to spend $2.8 million on greenfield exploration related to the Côté Gold property, including the Gosselin zone, and has spent $1.4 million in the first half of 2021. The Gosselin zone is centered approximately 1.5 kilometres northeast of the Côté Gold deposit. Approximately 13,000 to 16,000 metres of diamond drilling is planned in 2021, focused on the delineation drilling program on the Gosselin zone, of which 10,200 metres were drilled in the first half of 2021. The Company expects to release an initial resource estimate for the Gosselin zone in the fourth quarter of 2021.