In 1981, the city of Eschweiler developed concepts for an Eschweiler lake; The Eschweiler See Sailing Club was founded in 1979. In 1982, the resettlement of the population from Erberich, Langendorf, Laurenzberg, Lürken, Langweiler and Obermerz began, mainly to Neu-Lohn and Fronhoven. Blausteinsee GmbH was founded as a municipal sponsoring company for the municipalities of Aldenhoven, Alsdorf, Eschweiler and Würselen and the planned Eschweiler Lake was renamed Blausteinsee. The Blausteinsee was the first intermunicipal project in the Aachen region.
It was named after the old district of Am blau Stein north of Dürwiß. This name can already be found in old field maps and German base maps. It goes back to the 3.50 meter high Fronhoven Cross that once stood on the provincial road between Dürwiß and Fronhoven, a wayside cross from the 17th or 18th century, not a bluestone quarry.