Oxide Expansion Project

A positive aspect of the heap leaching method for gold production is that it does not generate mine tailings as waste. The leached ores are continually recycled onto the leaching pads until recovery is completed. The leach pad is rinsed to remove any solution, and will then be covered and revegetated a the end of the project. 

As an additional safeguard, a fully lined storm water pond is built below the heap leach bays to 
trap water. 

To prevent sediments and silts that travel down from the mountain along natural waterways such as creeks and streams, with the potential of converging on coastlines where water is discharged into the seas, PT BSI has constructed multiple check dams and brush fences along those creeks and waterways. During a particularly heavy downpour, rainwater would quickly collect in the main Katak Creek that runs down the mine site. A high volume flow of water in the creek would consequently increase sediment transport downstream. However, the rock and geotextile check dams built by PT BSI have been proven able to slow water velocity and retain most of the sediments. 

PT BSI has ensured that its environmental safety and safeguard measures comply with best-practice international standards and are therefore adequate to protect the environment and communities in which the Company operates. In 2016, as in the previous year, there were no environmental compliance issues that had compromised BSI’s activities.

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