Objectives:
This research aims to provide an evaluation of the consistency of the fundamental assumptions behind a newly proposed DAC matrix (within LOP II) against acceptability criteria adopted more broadly in open pit mining. It is postulated that risk tolerance, measured as the likelihood of human loss or injury and environmental damage, shows little variability within mature industries; and that variability in DAC for engineering structures follows differences in the elements at risk, their exposure and the achievable control over the hazards associated with the structure. Therefore, this work will be expanded to include civil engineering slopes to assess the fundamental underlying assumptions for risk tolerance, particularly in terms of consequence magnitude and risk appetite.