This paper presents a case study outlining the positive learnings from proactive corrosion design at a remote gold mine in Northern Canada. It was recognised from the design stage that many assets in the process plant would be exposed to high levels of salinity due to the water recycling process. One asset of concern was structural concrete as it was estimated that Ordinary Portland Cement (OPC) concrete would only last 4 years’ service life before the first damage (caused by rebar corrosion), particularly in the wet process locations. In 2017, the design team optimised the concrete mix design for durability over the life of mine (15 years) and included a concrete monitoring system to measure ongoing performance (consisting of reference electrodes and corrosion rate probes). The plant started operation in 2019. Over the past 5 years of operation, corrosion monitoring data have been collected, concrete cores have been used to determine chloride diffusion rates and concrete service life models have been populated. This paper provides an analysis of the assumptions made in design including a quantitative comparison of the impact of the selected option versus continuing with OPC. The paper will cover an assessment of the performance of the concrete (and risk) versus expectations, general costs and CO2 emission impact. Discussion will be presented on the scale of the benefits and the importance of including proactive corrosion considerations from the design stage of a project.