The development of acceptable and achievable completion criteria is fundamental to the successful relinquishment of mined land to a post-mining use. Despite the central role of completion criteria, there is still a need to build capacity and understanding of how to set targets and develop measurable completion criteria that are accepted by all stakeholders involved. The work described in this paper aimed to elicit industry practice, barriers, and opportunities for the development of feasible and acceptable completion criteria. We developed a quantitative survey that was administered online. The target respondents consisted of mining companies, consulting businesses, and relevant regulators in Western Australia. The survey questionnaire, raw survey data, and summary statistics are provided in this paper to increase research transparency and facilitate reproducibility of the methods by researchers in other jurisdictions.