This article describes the preliminary results of a study in the Port of Rotterdam to assess the carbon footprint of port infrastructures, In the study two types of port infrastructure have been selected, a road construction and a quay wall construction. For both structures the individual components of these structures were categorized to assess of each element of the contribution to the carbon footprint. The total carbon footprint has been derived for the whole process, design, construction and demolition. With this study first insight has been obtained over the carbon footprint of these structures. On the basis of the results of this study further analysis for other types of other port structures will be performed to try to reduce carbon footprint in the construction chain of port structures.