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Home Our operations test, trial and implement solutions for enhanced biodiversity and tailings management outcomes

Our operations test, trial and implement solutions for enhanced biodiversity and tailings management outcomes

Location

Australia

WA Mungari
NSW Cowal, Northparkes
QLD Mt Rawdon

Like sustainability, continuous improvement is embedded into everything we do at Evolution. Across our operations, we strive to leave a positive legacy – undertaking progressive rehabilitation, approaching potential environmental challenges as continuous improvement opportunities and pursuing innovation to bring about improved biodiversity outcomes.

Mungari Operations continues to take a proactive approach to rehabilitation, delivering progressive earthworks across its operations to support long-term environmental outcomes. Rehabilitation of a 35-hectare area that included a waste rock dump, ROM pad and paste plant was completed in May 2026, following successful topsoiling, ripping and seeding. This marked an important step toward establishing a stable, non-polluting and self-sustaining landform and reflects the strong collaboration between Mungari’s Environment team and rehabilitation earthworks contractor, Raywell Contracting. Through innovation, open communication and the application of lessons learned from previous projects, the team continues to refine and strengthen rehabilitation practices for future works.

At our Cowal Gold Operations, we developed an innovative aquatic management approach when the team was faced with the challenge of removing a large population of invasive common carp during the Open Pit Continuation Project. Invasive common carp are known to degrade water quality and have a negative impact on native aquatic fauna. The safe identification, capture and relocation of native aquatic species was prioritised, with native fauna carefully protected whilst the carp were removed and humanely euthanised. Traditional disposal practices for invasive aquatic species often involve burial or landfill disposal, contributing to significant waste generation and long-term land management liabilities. The project moved beyond standard industry disposal practices, diverting carp from burial or landfill to a local processing facility, where 17 tonnes of biomass was converted into nutrient-rich organic fertiliser for rehabilitation and regional agriculture. Some fertiliser will be sent to Cowal for use in future rehabilitation activities.

Northparkes Operations established vegetation trials on an inactive tailings storage facility, with the aim of reducing dust and investigating alternative rehabilitation methodologies. The trials utilised treated biosolids from the Parkes Shire Council to improve the ability for plants to grow directly into the tailings material. A range of native seed mix combinations were used to determine the optimum combination for growth and performance. Following initial success of this trial, Northparkes is looking to expand the trials across two other tailings facilities that are transitioning into a period of inactivity. Vegetation establishment directly into the tailings material provides a long-term dust management solution whilst informing future rehabilitation practices using waste sourced through regional partnerships.

These rehabilitation studies and continuous improvement initiatives are complemented by the ongoing capping trials being undertaken at Mt Rawdon Operations.