From to cooperation – engineers overseas and the rise of planning expertise in the twentieth century

By shedding light on the overseas branch of the Corps des Ponts-et-Chaussées (CPC), this article analyses the scientific and technical contribution of this sub-group of engineers in the post-Second World War era. After introducing the historical background of the early involvement of the CPC in the French colonies, this paper concentrates on the late colonial period. Details of the strong interconnectedness of metropolitan and overseas technical expertise are provided. It is shown that civil engineering practised overseas not only enhanced many technical fields within the traditional preserve of the Corps but also facilitated the rapid expansion of the Corps out of this very preserve. Engineers were prompt in including urban expertise and town planning, rural hydraulic and hydrogeology within their current field of activities. Consequences were highly significant not only for overseas urban and rural milieu, but also for metropolitan territories undergoing post-war redevelopment. The last section of this article shows how the techno-scientific practice acquired overseas was instrumental in the post-colonial years to foster the redeployment of the CPC as a whole in the different fields of civil engineering on an international scale.