Mt Todd Gold Mine

Vista Gold - Parent Company

Technical Reports

Environmental Impact
Statement

Industry Capability Statement

Welcome to Mt Todd Gold Mine

The Mt Todd mine site is located approximately 50 km north of Katherine and 250 km south of Darwin. The site covers a mine tenement of more than 153,700 ha, which includes both the Batman and Quigley's gold deposits.

The site was acquired by Vista Gold and its wholly owned subsidiary Vista Gold Australia in 2006.

Currently not in production, Vista Gold is working with the authorities to obtain the necessary permits for the mine prior to making a final investment decision on the project.

A favorable investment decision could lead to a two-year construction phase employing approximately 350 people with an ongoing workforce of 300 during operations.

Vista Gold announced estimated mineral resources for the Mt Todd Gold Project on July, 30 2025 in the Mt Todd Gold Project Feasibility Study (Batman Deposit, Quigleys Deposit and Heap Leach Pad) as follows:

2025 Feasibility Study @ 15,000 tpd

Approach

The 2025 FS prioritizes an initial project scale designed to significantly reduce initial capital costs, development risk, and operating risks. Vista leveraged GRES’ extensive experience in designing and building similarly sized gold projects in Western Australia to achieve these objectives.

Additionally, the Study prioritizes grade over tonnes. The cut-off grade was raised from 0.35 g Au/t to 0.50 g Au/t resulting in average plant feed grade of 1.04 g Au/t in years 1-15 and 0.97 g Au/t over the life of mine. The metallurgical recovery is dependent to a small degree on mill feed grades. We expect gold recoveries to range from 87-89% resulting in average annual gold production of approximately 153,000 ounces (years 1-15) and 146,000 ounces (life of mine).

The 2025 FS contemplates contract mining and third-party power generation using experienced Australian contractors, contributing to capital cost savings and reducing operational risks. Staffing assumptions have also been adjusted to provide the Project with a highly experienced operating team with a balance of fly-in-fly-out and community-based employees. The Study does not evaluate future expansions, but the designs and layouts have allowed for this opportunity.

Production

The Batman deposit has a large, higher grade central core. The Study concentrates on mining that core at a higher cut-off grade. Ore stockpiles will be used to prioritize higher grade ore to the processing plant in early years. Material below the cut-off grade with economic potential (0.35-0.50 g Au/t) is not included in Mineral Reserves but will be segregated in the waste rock dump for possible future processing.
Processing will include primary gyratory, secondary cone, and third stage high pressure grinding roll crushing followed by single-stage x-ray transmission sorting and two stages of grinding (ball mill and vertical mill) to produce a final product with an 80% passing size of 40 microns. This final product of the communication circuit will be leached in a conventional CIL circuit followed by adsorption on activated carbon, stripping, electrowinning and smelting to produce doré bars. Tailings will be deposited in one of two tailings storage facilities (“TSF”). The existing tailings storage facility (TSF 1) has an approved expansion capacity for approximately 90 million tonnes. Construction of the second facility is expected to commence in year 19.

The Study contemplates concurrent reclamation of the waste rock dump and tailings storage facilities. A water treatment facility is planned as part of the water management plan, with installation to take place during the initial Project development phase.

For the full 2025 Feasibility Study Report and the latest Corporate Presentation please head to our corporate website www.vistagold.com

Mt Todd Environment Protection and Biodiversity Conservation Act 1999 (the EPBC Act) Approval

In early 2018 the project was issued an approval for a "Controlled Action" (mining) under the Environment Protection and Biodiversity Conservation Act 1999 (the EPBC Act). This was a product of a number of studies and a comprehensive "Management and Mitigation Plan" outlining the commitments made by the project to ensure effects of mining (if any) are identified and minimised. Below are links to the approval documents and the associated plans that they refer to;

We are now finilising the Management and Mitigation Plan (which is required prior to commencement of "works") and Offset Proposal. Both of these are well advanced.

Pictured is the water release point taken 17th Jan 2017

2013 Batman Mine void 2017 Batman Mine void 2018 Batman Pit Void

2019 Batman Pit Void

2020 /03 Batman Pit Void

2020 /09 Batman Void

2021 Batman Void

2022 Batman Void

2023 Batman Void

2024 Batman Pit Void

Mt Todd Drone Flyover December 2022

Community Feedback Number

(08) 8941 9108

Call the Mt Todd Community Feedback Line at 08 8941 9108 with any issues, comments or questions you may have – and we will listen.

You can also reach us through this website at http://www.mttodd.com.au/contact-us.html - simply click on “Contact Us” tab and select any one of the contacts listed or fill out the online comment form at the bottom of the page.

Mt Todd Gold Mine Project