The Queensland Department of Transport and Main Roads published a Guidance Note – Infrastructure Sustainability Base Case Framework. This guidance supports the Queensland Government’s requirement for all government infrastructure projects over $100 million to have a sustainability assessment. The guidance uses the Infrastructure Sustainability Council’s IS Rating Scheme. 

The purpose of this guidance note is to provide guidance for Consultants and Project Managers on how to prepare a Base Case Proposal and calculated Base Case for assessment as part of a project’s Infrastructure Sustainability (IS) Design and/or As Built rating (infrastructure sustainability assessment). The Base Case is to include ‘business as usual’ (BAU) technologies, processes, components and methodologies. This guidance outlines what materials, designs and methodologies the Department of Transport and Main Roads regards as BAU. 

However, projects are cautioned not to rely on this Framework as an IS rating evidence document, and any assumptions taken from this document must be reviewed, confirmed, and evidenced at a project level.