Since the 20th century, the Black Forest has seen the large-scale generation of electrical power using run-of-the-river power plants and pumped storage power stations. From 1914 to 1926, the Rudolf Fettweis Company was established in the Murg valley in the Northern Black Forest with the construction of the Schwarzenbach Dam. In 1932, the Schluchsee reservoir, with its new dam, became the upper basin of a pumped-storage power plant. In 2013 the association of the Southern Black Forest's Schluchseewerk owned five power plants with 14 storage tanks. At the Hornberg Basin topographical conditions allow an average head of water of 625 m to drive the turbines before it flows into the Wehra Reservoir.