Perched at 848 meters above sea level, Klöntalersee has charmed artists and tourists since 1655. A recent addition of a 220-meter-long and 21.5-meter-high earth bulk dam boosts its water capacity to 39.8 million cubic meters. This enables flexible electricity generation to meet varying demands. IngenieurTeam GEO GmbH conducted pioneering hydrography and photogrammetry techniques to create a detailed 3D model of the reservoir, crucial for accurate capacity assessment and simulations.