This Quesnell Bridge case study was undertaken following the steps outlined in the PIEVC Engineering Protocol for Climate Change Infrastructure Vulnerability Assessment (October 2007) (the Protocol) which was developed by PIEVC for the purpose of providing a uniform platform in assessing infrastructure vulnerability to climate change. The five major steps in the protocol guide the practitioner in defining the project parameters and gathering relevant information, then, subsequently, in performing qualitative and indicator analyses to identify whether vulnerability exists in certain infrastructure components. If vulnerability is identified, the practitioner then provides recommendations and proposes actionable items for the particular infrastructure and/or for the design or evaluation of similar structure types in general. Since it is recognized that data may not always be accessible, the Protocol allows the practitioner to state any data gaps and propose methods to develop the data for future studies.