Toward a social and environmental history of the building of Cahora Bassa dam

This paper examines the intertwined social and environmental histories of t he Cahora Bassa dam constructed on the Lower Zambesi River in Mozambique. A basic premise of this historical analysis is that social and ecological su stainability are necessarily linked. We trace the transformations wrought b y Cahora Bassa and the devastating effects on peasant communities inundated by the dam's reservoir, on down-river communities and on the ecosystems of the Lower Zambesi. The grandiose aims of the Portuguese colonial state to 'develop' the Lower Zambesi by regulating the river contrast sharply with t he exploitation of African workers recruited to build the dam. The project was also steeped in the discourse of national security, which provided a co nvenient rationale for burying information regarding the dam's likely conse quences. Oral testimonies from the labourers who constructed the dam and pe asants whose livelihoods were disrupted reveal the harsh costs of Cahora Ba ssa. Similarly, the regulation of the Lower Zambesi irrevocably altered the region's ecosystems contributing to a general loss of ecological integrity . The Cahora Bassa project demonstrates that questions of sustainability ar e linked to relations of domination and struggles over meaning. The history of Cahora Bassa is about an authoritarian colonial state willing to achiev e a set of economic and strategic objectives using all the coercive power a t its disposal without regard for the social and ecological consequences.