The Duero River Basin Authority (Confederación Hidrográfica del Duero) is the autonomous organism responsible for water management within the Spanish territory of the Duero River Basin (as the Duero Basin is an international basin, shared by Spain and Portugal). For administrative purposes, it is attached to the Spanish Ministry of Agriculture, Food and Environment. It was created in 1927. In the beginning, it was in charge of administering water for irrigation and hydroelectric power. Nowadays, the River Basin Authority’s main duties include water planning, water quality management, flood prevention, environmental matters and managing water rights and licenses, among others.