<p>Floods are considered as one of the most recurring and significant natural disasters around the world affecting land, lives and livelihoods of communities. The Misings, a riverine community of Assam in India, have been co-existing with riverine floods for decades with the help of their traditional knowledge and flood management practices. This paper tries to elaborate on this complex web of relationship between the human and the non-human river using Posthuman theory. Based on a qualitative case study of a riverine Mising village, this paper will argue that their traditional ways of living with the river was more in consonance with the river flow and ecology which resulted in co-creation of knowledge for survival and co-existence. However, the construction of a Megadam on the upstream of the river has led to considerable changes in the river flow and nature of floods. The paper will further explore how the nature of floods in the downstream of Ranganadi has changed to more devastation affecting their natural way of life with the river and leading to a failure of their traditional wisdom of flood prediction. This new nature of dam-induced floods has brought considerable changes in their agricultural practices, livelihood, housing structure and their overall relationship with the river. Finally, the paper will argue that de-contextualized development which is ignorant to this complex web of relationships between the human and the non-human entities leads to a loss of the Mising’s sense of place and cultural identity altogether.</p>