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The practice of public control and supervision of dams in Norway started in 1909 with the foundation of the Control Department in the former Norwegian Water Administration, which was succeeded by the Norwegian Water Resources and Energy Administration (NVE) in 1920.
NVE, which is now a directorate under the Ministry of Petroleum and Energy, is still the governmental authority on dam safety in Norway. Today the function of the former Control Department is taken care of by the the Licensing and Supervision Department, Section for Dam Safety in NVE. The main activities of the Section for Dam Safety are related to supervision of dams and appurtenant structures, including approval of plans for construction and rehabilitation, and administration of the legal framework for dam safety, including development of new technical guidelines.
The main goal of the public supervision is to ensure a uniform high level of safety on Norwegian dams and appurtenant structures, and thereby ensure that these structures are not posing a threat to life, property or the environment. NVE give the highest priority to the dams in the highest consequence classes, i.e. consequence class 3 and 2. The number of dams subject to public supervision, and thereby included in the dam register held by NVE, are approximately 2600. More than 290 of these dams are classified as class 3 dams, and 335 are large dams (height > 15 m). The dam register also include some technical data for other structures such as intake structures, penstocks, tunnels and canals.