Free, prior, and informed consultation and consent has become an important interface in encounters between governments, corporations, grassroots organisations, and other actors, particularly in cases involving extractive activities. Based on over two years of collaborative research, this article examines the consultation and consent processes for the Environmental Management Plan for a large hydroelectric dam in Afrodescendant and Indigenous ancestral territories in Western Colombia. We identified several problems lessening the effectiveness of the consultation processes, particularly the seeming impossibility of crafting conditions for genuine interculturality, and the state's lack of political will to uphold consent. We conclude that the most significant variable in achieving concrete benefits for the communities is the strength of their political organisations.