Reclamation has carried out its mission to manage, develop, and protect water and related resources in 17 western states since 1902. The agency has led or provided assistance in constructing most of the large dams and water diversion structures in the West for the purpose of developing water supplies for irrigation, as well as for other purposes, including hydroelectric power generation, municipal and industrial water supplies, recreation, flood control, and fish and wildlife enhancement. Reclamation is organized into five regions, with technical and policy support provided by its central office in Denver.