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Bauxite mining

The extent of strip-mining

Long-term mining leases held by ALCOA and Worsley Alumina cover most of the northern Darling Range State forests and drinking water catchment areas. They include a majority of the walk areas on WalkGPS.  Strip-mining for bauxite first commenced at Jarrahdale in 1963 and major expansions of mining operations within the leases have since been approved by Government.

Impact on bushwalking

The expansions will increasingly impact on and greatly diminish quality bushwalking opportunities in the region in coming years. Bushwalking areas to be affected by the mining will in the future stretch from Bannister Hill in the south to beyond Mount Dale in the north. Walks that will be affected include at least Bannister Hill Walk, Geddes Rock Walk, Gibbs Rocks Walk, Upper Dale River Walk, Qualen Road Walk, Willies Road Walk and Christmas Tree Well Walk. Further south the expansion of the Willowdale operations into Lane Poole Reserve south of Dwellingup will soon reach within 200m of the Murray Campsite on the Bibbulmun Track; mining noise impacts will presumably require re-location of the campsite. (Click for time lapse image of Willowdale operations for 1987-2016 period.)

Changing conservation priorities

Over the decades since the mining began, some new national parks have been declared in the Darling Range, but some forest conservation areas proposed in a 1994 plan were later greatly modified. These affected the proposed Gyngoorda Conservation Park around the Bannister Hill walk area and the proposed Gibbs Conservation Park around upper Dale River walk area. The changes evidently accommodate Worsley’s evolving mining expansion priorities. In the current Forest Management Plan produced by the Conservation & Parks Commission of W.A., the area of the proposed ‘reinstated’ Gyngoorda CP is 1350ha, less than 40% of the original planned area, and no longer protecting the whole of Bannister Hill; The total area of the proposed Gibbs CP has been reduced to 2280ha, also less than 40% of the original. (See WalkGPS video below.)

Worsley mining expansion

The State’s Environmental Protection Authority (EPA) in February 2008 gave its approval for a major expansion of Worsley Alumina’s operations. The EPA is an independent Authority with the broad objective of protecting the State’s environment. One of the EPA’s responsibilities to the community is to ensure that existing and planned recreational uses are not compromised. Worsley’s mining expansion environmental submission (‘ERMP’) in 2005 was misleading, stating that “most of the identified [recreational] sites [within and near the proposed mining areas] are in the area around the Bibbulmun Track” though acknowledging in the same document a number of affected walk areas that were published on WalkGPS and clearly remote from the Bibbulmun Track.

ALCOA mining expansion

In late 2016 ALCOA announced its plans to start exporting unprocessed bauxite to China, bypassing its existing refineries near Perth and greatly accelerating the rate of removal of mature forest for the mining. For ALCOA’s Huntly operation alone, the gross area so far affected is over 400 sq km and the mining footprint is now expanding at a rate of over 3000ha a year around the Mount Solus area (see time lapse image for 1987-2016 period).

Environmental impacts

The extraordinary accelerated rate of expansion is surely outstripping the forest’s ability to eventually recover. Despite the miners’ claims of globally unparalleled excellence in rehabilitation of mined native forest areas, huge areas of mature forest habitat on Perth’s doorstep are being lost. The degraded landscape is quickly and cosmetically re-greened by the miners, but we would be gullible to accept any assurances that this young replacement forest will thrive in the longer term. Alcoa has claimed “over an expected 100-year or so life of the viable bauxite reserves, [the company] will have disturbed [only] 5.6% of the northern jarrah forest”. Today, less than 15 years after that 2003 assurance, satellite imagery across the Huntly operation reveals that the actual disturbance  is already much greater and is increasing at an unprecedented rate.

In a 2007 article “Bauxite Mining in Jarrah Forests” Roger Underwood, a former General Manager of W.A. Department of Conservation and Land Management (CALM), noted that “Apart from the loss of native forest, there has been a significant loss of run-off into streams and dams in the mined-over catchment areas. Pits have been designed to retain rather than shed rainfall, so run-off to forest streams is close to zero, and in many cases old mine pits cover nearly 50% of each sub-catchment. This has obvious impacts on water resources and aquatic ecosystems.”

CSIRO has measured the substantial decreases in water yield from mined catchment areas. The cost to the State to boost desalination to replace this loss in drinking water availability is now likely to annually exceed the royalties paid to the State by the miners (for details see F. Batini, FIFA, 2016). But the DoW in its published Plans of 2007 was more concerned with the impact of bushwalkers than with bauxite miners:  Its “Mundaring Weir Catchment Area Drinking Water Source Protection Plan” considered perceived risks of bushwalking and camping activities on water quality but made no mention of the substantial impact planned future mining will have within that same catchment and its risks for water run-off. The DoW’s “Canning River Catchment…Plan” noted only  that “bauxite mining does not currently occur in the catchment” but will be “acceptable if operated in compliance with conditions…”.

Public awareness

The general public is not informed as to what is happening to the Darling Range and the consequences for future generations. The battle to stop expansions of the strip-mining was lost by conservationists back in the early 1980’s. The Campaign to Save Native Forests continued to fight for conservation of our forests; the impacts of  mining were no longer a focus but CSNF publications such as “Forests on Foot – 40 walks…” (Meney & Brown 1985) encouraged continuing public awareness and connection to our forests. But today the conservationists are strangely silent on the mining expansions and – in the absence of information –  the community is at present largely disinterested. That will change if expanding exports of bauxite lead to refinery cut-backs and massive local job losses.

Consultation?

The State forests affected by the mining have multiple uses. Recreational bushwalking is one legitimate use. The miners are required to submit updated mining plans annually for approval to a multi-agency liaison group (‘MMPLG’) so that the activities of other forest users can be integrated. But this group has no community representation or public accountability; And the miners’ community consultation processes focus on ‘local’ communities, bypassing the broader community including bushwalkers. The miners’ claimed “social licence to operate” cannot be legitimate in the absence of transparency and proper consultation with the community on the impacts of the current rate of mining expansion and the export of unprocessed bauxite.

What to do?

In the face of such obstacles, the bushwalking community needs to find its own ways to keep itself more informed and aware of the impacts of the mining expansions on popular walk areas. We should also attempt to achieve at least the following:

1. forest roads giving access to our walk areas are kept open;

2. mining plans retain attractive breakaway landscape plus sizeable pockets of original forest wherever possible;

3. vegetation buffers are preserved to screen operations from adjacent bushwalking areas ; and

4.  blasting noise and dust emissions from sites close to walk areas are minimised.

The legacy

Future generations may well ask in dismay how any growing city could have allowed a once extensive mature and unique forest right on its doorstep to be so plundered and degraded.  As Roger Underwood, also said in his 2007 article:

“One of the most interesting anomalies in Australian environmentalism is that the alumina industry is destroying the jarrah forest – and nobody seems to care. At least, nobody is complaining.” …..there will come a time in the not-too-distant future when West Australians realise what has gone on, and the extent and cost of the ecological damage which has occurred. Then perhaps they will look back on the …. destruction of the jarrah forest by bauxite mining as one of the greatest conservation blunders in our history.”


“Bannister Hill – once was a Conservation Park”
– WalkGPS video.

(length = 3:59 minutes)

Alternatively: Click here to view the video on Vimeo.

Additional information

“Changing the Mt Solus landscape” – WalkGPS video.

“Disappearing wandoo woodlands & laterite breakaways” – WalkGPS video.

“Impact of bauxite mining on water yield” presentation – F. Batini FIFA (from “Managing forested catchments – threats and opportunities”, Institute of Foresters Australia workshop, 2016)

“Mostly out of sight and mined?” – Dave Osborne article, Aug. 2013.

 

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