Interestingly, the substantial variation in surface pipeline cost models does not provide sufficient granularity to compare the effect of CO 2 -compatible pipeline materials on cost. One would expect a CO 2 pipeline to have a higher cost than a steel pipeline of the same diameter. This increased cost would be due to the higher costs associated with procuring and working with stainless steel. Nonetheless, we assume that the pipeline cost is insensitive to material type and recommend using the genGEO relation derived in this study for both CO 2 and water.