Mines can be vulnerable to climate extremes as repeated downtime during and after such an event can be costly and time consuming and also damaging to a mine's reputation. Whilst modelling and risk management processes are part of a mine's normal operation, repeatability and developing alternative future models are costly and slow. We have developed an alternative, faster, less expensive vulnerability and adaptation assessment tool, CRATER (climate related adaptation from terrain evaluation results). It identifies the current status for potential flood hazards, provides a snapshot of the site at the current time and can improve mine planning to reduce risk. In the second phase of development, we are performing forward modelling of pre-existing GIS layers to consider changes to extreme events such as flood or drought, volume or extent of vegetation cover, locations and depths of new pits or heights of new levées, proposed locations of redirected creeks and infrastructure placement. The CRATER method will use various iterations to assess how flood-vulnerable hot-spots may be reduced or may be moved to less critical areas, whilst evaluating best water storage options during extreme drought. Iterative use of multiple ‘what-if' scenarios will help develop alternative planning options to protect revenue whilst reducing environmental and reputational damage.