Tomingley Gold Extension Project
Central Western New South Wales
100% Alkane Resources Ltd
>1 million oz gold (indicated and inferred)
Development application in progress (SSD)
Open cut and underground
Carbon-in-leach processing at the existing Tomingley Gold Operations facility
About the Tomingley Gold Extension Project
Alkane plans to extend mining at Tomingley Gold Operations (TGO) to the San Antonio and Roswell (SAR) Resources immediately south of the current mine.
The SAR Resources are now incorporated into Alkane’s life of mine (LOM) plan, which has been extended to at least 2031. The current plan shows the production of approximately 745,000oz of gold, with processing ramping to a 1.5Mtpa feed rate.
The NSW government classifies this project as a State Significant Development (SSD). We’ve been consulting extensively with government agencies, industry regulators, stakeholder groups and the local community about the project. Feedback from these ongoing consultations continue to inform the project design and rehabilitation plan.
The key elements of the Tomingley Gold Extension Project are outlined below.
Open cut and underground mining
The open cut will comprise three pits combining the adjacent San Antonio and Roswell deposits (the SAR open cut). The total open cut will be up to 1.7km long, 700m wide and 310m deep. We expect to mine this open cut in stages to minimise biodiversity disturbance and allow progressive rehabilitation.
We also plan to develop an underground mine at Roswell, utilising the exploration drive originating at the Wyoming One underground operation. A portal may later be established within a completed stage of the SAR open cut.
Processing of the ore will take place at the existing TGO processing plant, which will undergo some modifications to achieve the already approved 1.5Mtpa rate, with production to be increased to 1.75Mtpa for short periods. We will also increase the height of the second residue storage facility (RSF) to the south of the existing RSF.
A haul road will transport ore via the existing Newell Highway underpass from the SAR open cut to the TGO processing plant.
Waste rock and progressive rehabilitation
A waste rock emplacement will be established in the vicinity of the SAR open cut. We also propose to backfill the two Caloma open cuts and, in time, backfill a a portion of the SAR open cut.
We intend to undertake progressive rehabilitation of these waste rock emplacements to ensure they are returned to stable and productive landforms that reside sympathetically within the environment.
Newell Highway realignment
Since the San Antonio and Roswell deposits are underneath the current Newell Highway, TGO proposes to construct a new section of highway to bypass the development. The new section of highway will be built to the latest Austroads standards and incorporate several safety features.
Kyalite Road also needs to be realigned since it currently runs through the proposed open cut and needs to remain outside the 500m blast exclusion zone. We propose to divert the road slightly northwest via an overpass over the haul road, to meet the Newell Highway about 770m north of the current intersection.
These activities are being planned in close consultation with Transport for NSW, as well as Narromine Shire Council, residents and road user groups.
TGO has negotiated purchase of seven properties (approximately 2700ha) for this project. Some of this land holds the SAR deposit or is earmarked for waste rock emplacements and other supporting mine infrastructure. We also need some of the land for construction of the new sections of Newell Highway and Kyalite Road.
Once the new sections of road are open, TGO will gift the associated land to Narromine Shire. The balance of those properties (not needed for the mining operation) will be restored to a mix of agricultural land and biodiversity offsets (e.g. native bushland).
Upon conclusion of mining, the SAR mine site will be fully rehabilitated and restored to stable and productive agricultural land or ecosystems. The final landform will include one final void and a rehabilitated waste rock emplacement. We are committed to maintaining agricultural productivity, as well as protecting, enhancing and re-establishing areas of native vegetation during and following the life of operation.
The timeline for this project to commence depends on the SSD approval process. Broadly, we anticipate the Environmental Impact Statement (EIS) to be submitted Q3 and exhibited Q4 2021. Following our response to submissions, the timing for assessment of the application is a matter for the NSW Department of Planning, Industry and Environment.
Since this project is an extension of our existing operations, we are working with the NSW government to expedite the approval process. TGO has a proven track record and has demonstrated substantial benefits for the local community. We hope to obtain consent by Q3 2022. Stakeholders and the local community can help by making a submission in support or otherwise of the project at the public exhibition stage (anticipated to be Q4 2021).
Once we have consent, we’ll begin construction of the Newell Highway and Kyalite Road realignments, which is expected to take around six to nine months.