Argentina v. Uruguay (Case Concerning Pulp Mills on the River Uruguay)

Uruguay (defendant) authorized construction of two pulp mills on the shared Uruguay River without referring its plans to the bilateral river commission or notifying Argentina (plaintiff) as the treaty required, though it did conduct an environmental-impact assessment considering at least four alternative mill sites; Argentina sought removal of the already-built mill, arguing both procedural and substantive treaty violations, including an inadequate site-alternatives analysis.