The case on the Indus Waters Kishenganga Arbitration between India and Pakistan has been started in May 2010 by Pakistan. Between 2011 and 2013, an arbitral Tribunal established in accordance with the Indus Waters Treaty of 1960, issued four decisions, notably the Order on the Interim Measures of 23 September 2011, the Partial Award of 18 February 2013, the Decision of 20 December 2013 on India's Request for Clarification or Interpretation dated 20 May 2013 and the Final Award of 20 December 2013. These decisions relate to an hydroelectric project, planned by India on the Kishenganga river that is part of the Indus river basin. The Kishenganga decisions are the first cases in which an arbitral Tribunal has been established to solve a dispute concerning the application and the interpretation of the 1960 Treaty. This Treaty is an emblematic example of cooperation on an international watercourse: it continued to be applied despite the hostilities in the Kashmir region and the three wars fought between India and Pakistan since its adoption. From an environmental point view, the recognition of the principle of the minimum environmental flow in a river is the most significant aspect of the Awards of 2013. India has the right to divert the waters of the Kishenganga River for the production of hydroelectric energy but it must do so by ensuring a minimum flow to protect water resources.