page_title: Möhne Reservoir
section_title: Construction and inauguration
hierarchical_section_title: Möhne Reservoir / History / Construction and inauguration
caption_attribution_description: Deutsch: Überlauf der Möhnetalsperre
context_page_description: The Möhne Reservoir, or Moehne Reservoir, is an artificial lake in North Rhine-Westphalia, some 45 km east of Dortmund, Germany. The lake is formed by the damming of two rivers, Möhne and Heve, and with its four basins stores as much as 135 million cubic metres of water.
context_section_description: In 1904 calculations about the future demand for water for people and industry in the growing Ruhr-area determined that the existing storage volume of 32.4  million m³ in dams of the Ruhr river system needed tripling. Thus, on 28 November 1904, the general assembly of the Ruhrtalsperreverein decided to construct additional dams. During 1908 to 1913 they built the Möhnetalsperre at a cost of 23.5  million marks.
  When opened, the dam was the largest dam in Europe. 140  homesteads with 700  people had to move.
  It was built to help control floods, regulate water levels on the Ruhr river downstream, and generate hydropower. Today, the lake is also a tourist attraction.
caption: The dam in overflow
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