The Purpose Of This Contract Is To Contract A Service That Provides A Coherent Methodological Framework That Allows To Evaluate, Objectively, The Viability Of Each Of The Hydroelectric Infrastructures After The Completion Of Each Of The Concessions In The National Park Of Aigüestortes And Estany De Sant Maurici, In Charge Of The Funds Of The Recovery Plan, Transformation And Resilience, "Conservation And Restoration Of Ecosystems And Their Biodiversity."