We aim to minimise disturbance where possible and where unavoidable, rehabilitate land to an agreed use.
At MRM, the rechannelling of McArthur River and Barney Creek as part of the open pit development altered the riverine and riparian environments. The rehabilitation of these areas is a high priority for the establishment of the ecosystem in waterways and surrounding areas. Our rehabilitation program also plays an important part in ensuring the stability of the new channels to prevent erosion.
A major upgrade to our on-site nursery has lef to a dramatic improvement in the number of tubestock available for rehabilitation planting. In 2018, our team planted more than 100,000 trees, shrubs and grasses on the river channel, bringing the total since rehabilitation began to more than 530,000 plants.
Our aim is to recreate the natural environment by using plants native to each area and environment type. To plan for this, studies were conducted of the environment to identify the plant species and their natural density.
The rehabilitation of the new McArthur River and Barney Creek channels was designed to provide a suitable environment for fish passage and to establish a functioning riverine ecosystem by:
- including large woody debris along the channel bed and creating shallow pools to provide micro-habitats for fish
- revegetating the banks using seeds and seedlings from local species already growing along the river bank, using appropriate soils and fine sediments on the channel banks to promote root development, recreating rocky crevices and banks
- maintaining, monitoring and replacing plants and weeds as necessary.