Installation designed to use hydraulic power in the department of Orne in 2011.

Installation comprising the device supplying mechanical energy (beam wheels, turbine) and equipment using this energy (manufacturing of flour, generators of electricity, etc.).Old installations (such as old mills) — more or less conserved — may benefit from a special regime (water rights) and must therefore also be known to the services, and therefore listed in this data.The dams, thresholds, or other restraints, but not providing energy, are identified in specific layers.The installations with a power of more than 4500 Kilowatts are covered by the law of 16 October 1919 on the use of hydraulic energy. Cascade retains only those with a power of less than 4500 kw under the water police (the others are concessions under the DRIRE).